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  • How to use multiple flatpages models in a django app?

    - by the_drow
    I have multiple models that can be converted to flatpages but have to have some extra information (For example I have an about us page but I also have a blog). However I understand that there must be only one flatpages model since the middleware only returns the flatpages instance and does not resolve the child models. What do I have to do? EDIT: It seems I need to change the views. Here's the current code: from django.contrib.flatpages.models import FlatPage from django.template import loader, RequestContext from django.shortcuts import get_object_or_404 from django.http import HttpResponse, HttpResponseRedirect from django.conf import settings from django.core.xheaders import populate_xheaders from django.utils.safestring import mark_safe from django.views.decorators.csrf import csrf_protect DEFAULT_TEMPLATE = 'flatpages/default.html' # This view is called from FlatpageFallbackMiddleware.process_response # when a 404 is raised, which often means CsrfViewMiddleware.process_view # has not been called even if CsrfViewMiddleware is installed. So we need # to use @csrf_protect, in case the template needs {% csrf_token %}. # However, we can't just wrap this view; if no matching flatpage exists, # or a redirect is required for authentication, the 404 needs to be returned # without any CSRF checks. Therefore, we only # CSRF protect the internal implementation. def flatpage(request, url): """ Public interface to the flat page view. Models: `flatpages.flatpages` Templates: Uses the template defined by the ``template_name`` field, or `flatpages/default.html` if template_name is not defined. Context: flatpage `flatpages.flatpages` object """ if not url.endswith('/') and settings.APPEND_SLASH: return HttpResponseRedirect("%s/" % request.path) if not url.startswith('/'): url = "/" + url # Here instead of getting the flat page it needs to find if it has a page with a child model. f = get_object_or_404(FlatPage, url__exact=url, sites__id__exact=settings.SITE_ID) return render_flatpage(request, f) @csrf_protect def render_flatpage(request, f): """ Internal interface to the flat page view. """ # If registration is required for accessing this page, and the user isn't # logged in, redirect to the login page. if f.registration_required and not request.user.is_authenticated(): from django.contrib.auth.views import redirect_to_login return redirect_to_login(request.path) if f.template_name: t = loader.select_template((f.template_name, DEFAULT_TEMPLATE)) else: t = loader.get_template(DEFAULT_TEMPLATE) # To avoid having to always use the "|safe" filter in flatpage templates, # mark the title and content as already safe (since they are raw HTML # content in the first place). f.title = mark_safe(f.title) f.content = mark_safe(f.content) # Here I need to be able to configure what I am passing in the context c = RequestContext(request, { 'flatpage': f, }) response = HttpResponse(t.render(c)) populate_xheaders(request, response, FlatPage, f.id) return response

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  • Most efficient algorithm for merging sorted IEnumerable<T>

    - by franck
    Hello, I have several huge sorted enumerable sequences that I want to merge. Theses lists are manipulated as IEnumerable but are already sorted. Since input lists are sorted, it should be possible to merge them in one trip, without re-sorting anything. I would like to keep the defered execution behavior. I tried to write a naive algorithm which do that (see below). However, it looks pretty ugly and I'm sure it can be optimized. It may exist a more academical algorithm... IEnumerable<T> MergeOrderedLists<T, TOrder>(IEnumerable<IEnumerable<T>> orderedlists, Func<T, TOrder> orderBy) { var enumerators = orderedlists.ToDictionary(l => l.GetEnumerator(), l => default(T)); IEnumerator<T> tag = null; var firstRun = true; while (true) { var toRemove = new List<IEnumerator<T>>(); var toAdd = new List<KeyValuePair<IEnumerator<T>, T>>(); foreach (var pair in enumerators.Where(pair => firstRun || tag == pair.Key)) { if (pair.Key.MoveNext()) toAdd.Add(pair); else toRemove.Add(pair.Key); } foreach (var enumerator in toRemove) enumerators.Remove(enumerator); foreach (var pair in toAdd) enumerators[pair.Key] = pair.Key.Current; if (enumerators.Count == 0) yield break; var min = enumerators.OrderBy(t => orderBy(t.Value)).FirstOrDefault(); tag = min.Key; yield return min.Value; firstRun = false; } } The method can be used like that: // Person lists are already sorted by age MergeOrderedLists(orderedList, p => p.Age); assuming the following Person class exists somewhere: public class Person { public int Age { get; set; } } Duplicates should be conserved, we don't care about their order in the new sequence. Do you see any obvious optimization I could use?

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  • Flex: Create custom stroke on LineSeries?

    - by John Isaacks
    You can easily set a stroke on a line series like this: <mx:LineSeries yField="apple"> <mx:lineStroke> <mx:Stroke color="0x6699FF" weight="4" alpha=".8" /> </mx:lineStroke> </mx:LineSeries> This will set alpha for the entire stroke to .8 But I want to be able to set a different alpha on the stoke for each plot based on something in the dataProvider. For example the yField in the lineSeries is "Apple" which is how it knows where to plot for the lineSeries. I want to be able to add something like alphaField which tells it what to set the stroke alpha for each plot. so if my dataProvider was: <result month="Jan-04"> <apple>81768</apple> <alpha>1</alpha> </result> <result month="Feb-04"> <apple>51156</apple> <alpha>1</alpha> </result> <result month="Mar-04"> <apple>51156</apple> <alpha>.5</alpha> </result> And I set alphaField="alpha" then I would have a solid stroke from plot 0 to plot 1 and then a 50% alpha stroke from plot 1 to plot 2. How can I do this??? I am looking in the commitProperties() and updateDisplayList() methods of LineSeries and have no idea what would need to be added/changed to make this? I am pretty sure, this class has to use Graphics.lineTo() to draw each plot, so basically it would need to "get" the current alphaField value somehow, and apply a Graphics.lineStyle() with the correct alpha before drawing each line. Thanks!! UPDATE I have gotten much closer to my answer. When I extend LineRenderer I override updateDisplayList() which calls GraphicsUtilities.drawPolyLine() I extend GraphicsUtilities and override the method drawPolyLine() as this is where the line is actually drawn. I can call lineStyle() in here and change the alpha of the line... I still have 1 thing I cannot figure out, from within the drawPolyLine() method how can I access that data that dictates what the alpha should be? Thanks!!!!

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  • From a 3D modeler to an iPhone app - what are best practices?

    - by bonkey
    I am quite new in 3D programming on iPhone and I would like to ask for hints about organizing a work between designers and programmers on that platform. Most of all: what kind of tools, libraries or plugins cooperate the best on both sides. Although I consider the question as looking for general best-practices advice I would like to find a solution for my current situation which I describe further, too. I've already done some research and found following libraries: SIO2 Khronos OpenGL ES 1.x SDK for PowerVR MBX Unity3D Oolong Game Engine I've checked modellers or plugins to them giving output formats readable by those tools: obj2opengl Wavefront OBJ to plain header file converter Blender with SIO2 exporter iphonewavefrontloader Cheetah3D PVRGeoPOD for 3DS / Maya Unfortunately I still have no clear vision how to combine any of that tools to get a desinger's work in an application. I look for a way of getting it in the most possible complete way: models, lights, scenes, textures, maybe some simple animations (but rather no game-like physics), but I still got nothing. And here comes my situation: I would like to find right way to present few (but quite complicated) models from a single scene. The designers mostly use 3DS Max 9, sometimes 10 (which partly prevents using PVRGeoPOD) and are rather reluctant to switch to something else but if there's no other choice I suppose it would be possible. The basic rule I've already found in some places "use Wavefront OBJ" not always works. I haven't got any acceptable results with production files, actually. The only things worked fine were some mere examples. Some of my models did imported incomplete, sometimes exporters hung or generated enormous files not really useful on an iPhone, sometimes enabling textures (with GL_TEXTURE_2D) just crashed an app. I know it might be a problem with too complicated models or my mistakes coming from inexeperience but I am not able to find any guidelines for that process to have streamlined cooperation with designers. I am even willing to write some things from scratch in pure OpenGL-ES if it's necessary, but I would like to avoid what might be avoided and get the most from the model files. The best would be the effect I saw on some SIO2 tutorials: export, build & go. But at that moment I've got only "import, wrong", "import, where are textures?", "import, that almost looks fine, export, hang" and so on... Is it really so much frustrating or I am just missed something obvious? Can anybody share his/her experience in that field and tell what kind of software uses for "making things happen"?

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  • Insert default value if input-text is deleted

    - by Kim Andersen
    Hi all I have the following piece of jQuery code: $(".SearchForm input:text").each(function(){ /* Sets the current value as the defaultvalue attribute */ if(allowedDefaults.indexOf($(this).val()) > 0 || $(this).val() == "") { $(this).attr("defaultvalue", $(this).val()); $(this).css("color","#9d9d9d"); /* Onfocus, if default value clear the field */ $(this).focus(function(){ if($(this).val() == $(this).attr("defaultvalue")) { $(this).val(""); $(this).css("color","#4c4c4c"); } }); /* Onblur, if empty, insert defaultvalue */ $(this).blur(function(){ alert("ud"); if($(this).val() == "") { $(this).val($(this).attr("defaultvalue")); $(this).css("color","#9d9d9d"); }else { $(this).removeClass("ignore"); } }); } }); I use this code to insert some default text into some of my input fields, when nothing else is typed in. This means that when a user sees my search-form, the defaultvalues will be set as an attribute on the input-field, and this will be the value that is shown. When a user clicks inside of the input field, the default value will be removed. When the user sees an input field at first is looks like this: <input type="text" value="" defaultvalue="From" /> This works just fine, but I have a big challenge. If a user have posted the form, and something is entered into one of the fields, then I can't show the default value in the field, if the user deletes the text from the input field. This is happening because the value of the text-field is still containing something, even when the user deletes the content. So my problem is how to show the default value when the form is submitted, and the user then removes the typed in content? When the form is submitted the input looks like this, and keeps looking like this until the form is submitted again: <input type="text" value="someValue" defaultvalue="From" /> So I need to show the default value in the input-field right after the user have deleted the content in the field, and removed the focus from the field. Does everyone understand what my problem is? Otherwise just ask, I have struggled with this one for quite some times now, so any help will be greatly appreciated. Thanks in advance, Kim Andersen

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  • Utility that helps in file locking - expert tips wanted

    - by maix
    I've written a subclass of file that a) provides methods to conveniently lock it (using fcntl, so it only supports unix, which is however OK for me atm) and b) when reading or writing asserts that the file is appropriately locked. Now I'm not an expert at such stuff (I've just read one paper [de] about it) and would appreciate some feedback: Is it secure, are there race conditions, are there other things that could be done better … Here is the code: from fcntl import flock, LOCK_EX, LOCK_SH, LOCK_UN, LOCK_NB class LockedFile(file): """ A wrapper around `file` providing locking. Requires a shared lock to read and a exclusive lock to write. Main differences: * Additional methods: lock_ex, lock_sh, unlock * Refuse to read when not locked, refuse to write when not locked exclusivly. * mode cannot be `w` since then the file would be truncated before it could be locked. You have to lock the file yourself, it won't be done for you implicitly. Only you know what lock you need. Example usage:: def get_config(): f = LockedFile(CONFIG_FILENAME, 'r') f.lock_sh() config = parse_ini(f.read()) f.close() def set_config(key, value): f = LockedFile(CONFIG_FILENAME, 'r+') f.lock_ex() config = parse_ini(f.read()) config[key] = value f.truncate() f.write(make_ini(config)) f.close() """ def __init__(self, name, mode='r', *args, **kwargs): if 'w' in mode: raise ValueError('Cannot open file in `w` mode') super(LockedFile, self).__init__(name, mode, *args, **kwargs) self.locked = None def lock_sh(self, **kwargs): """ Acquire a shared lock on the file. If the file is already locked exclusively, do nothing. :returns: Lock status from before the call (one of 'sh', 'ex', None). :param nonblocking: Don't wait for the lock to be available. """ if self.locked == 'ex': return # would implicitly remove the exclusive lock return self._lock(LOCK_SH, **kwargs) def lock_ex(self, **kwargs): """ Acquire an exclusive lock on the file. :returns: Lock status from before the call (one of 'sh', 'ex', None). :param nonblocking: Don't wait for the lock to be available. """ return self._lock(LOCK_EX, **kwargs) def unlock(self): """ Release all locks on the file. Flushes if there was an exclusive lock. :returns: Lock status from before the call (one of 'sh', 'ex', None). """ if self.locked == 'ex': self.flush() return self._lock(LOCK_UN) def _lock(self, mode, nonblocking=False): flock(self, mode | bool(nonblocking) * LOCK_NB) before = self.locked self.locked = {LOCK_SH: 'sh', LOCK_EX: 'ex', LOCK_UN: None}[mode] return before def _assert_read_lock(self): assert self.locked, "File is not locked" def _assert_write_lock(self): assert self.locked == 'ex', "File is not locked exclusively" def read(self, *args): self._assert_read_lock() return super(LockedFile, self).read(*args) def readline(self, *args): self._assert_read_lock() return super(LockedFile, self).readline(*args) def readlines(self, *args): self._assert_read_lock() return super(LockedFile, self).readlines(*args) def xreadlines(self, *args): self._assert_read_lock() return super(LockedFile, self).xreadlines(*args) def __iter__(self): self._assert_read_lock() return super(LockedFile, self).__iter__() def next(self): self._assert_read_lock() return super(LockedFile, self).next() def write(self, *args): self._assert_write_lock() return super(LockedFile, self).write(*args) def writelines(self, *args): self._assert_write_lock() return super(LockedFile, self).writelines(*args) def flush(self): self._assert_write_lock() return super(LockedFile, self).flush() def truncate(self, *args): self._assert_write_lock() return super(LockedFile, self).truncate(*args) def close(self): self.unlock() return super(LockedFile, self).close() (the example in the docstring is also my current use case for this) Thanks for having read until down here, and possibly even answering :)

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  • algorithm optimization: returning object and sub-objects from single SQL statement in PHP

    - by pocketfullofcheese
    I have an object oriented PHP application. I have a simple hierarchy stored in an SQL table (Chapters and Authors that can be assigned to a chapter). I wrote the following method to fetch the chapters and the authors in a single query and then loop through the result, figuring out which rows belong to the same chapter and creating both Chapter objects and arrays of Author objects. However, I feel like this can be made a lot neater. Can someone help? function getChaptersWithAuthors($monographId, $rangeInfo = null) { $result =& $this->retrieveRange( 'SELECT mc.chapter_id, mc.monograph_id, mc.chapter_seq, ma.author_id, ma.monograph_id, mca.primary_contact, mca.seq, ma.first_name, ma.middle_name, ma.last_name, ma.affiliation, ma.country, ma.email, ma.url FROM monograph_chapters mc LEFT JOIN monograph_chapter_authors mca ON mc.chapter_id = mca.chapter_id LEFT JOIN monograph_authors ma ON ma.author_id = mca.author_id WHERE mc.monograph_id = ? ORDER BY mc.chapter_seq, mca.seq', $monographId, $rangeInfo ); $chapterAuthorDao =& DAORegistry::getDAO('ChapterAuthorDAO'); $chapters = array(); $authors = array(); while (!$result->EOF) { $row = $result->GetRowAssoc(false); // initialize $currentChapterId for the first row if ( !isset($currentChapterId) ) $currentChapterId = $row['chapter_id']; if ( $row['chapter_id'] != $currentChapterId) { // we're on a new row. create a chapter from the previous one $chapter =& $this->_returnFromRow($prevRow); // set the authors with all the authors found so far $chapter->setAuthors($authors); // clear the authors array unset($authors); $authors = array(); // add the chapters to the returner $chapters[$currentChapterId] =& $chapter; // set the current id for this row $currentChapterId = $row['chapter_id']; } // add every author to the authors array if ( $row['author_id'] ) $authors[$row['author_id']] =& $chapterAuthorDao->_returnFromRow($row); // keep a copy of the previous row for creating the chapter once we're on a new chapter row $prevRow = $row; $result->MoveNext(); if ( $result->EOF ) { // The result set is at the end $chapter =& $this->_returnFromRow($row); // set the authors with all the authors found so far $chapter->setAuthors($authors); unset($authors); // add the chapters to the returner $chapters[$currentChapterId] =& $chapter; } } $result->Close(); unset($result); return $chapters; } PS: the _returnFromRow methods simply construct an Chapter or Author object given the SQL row. If needed, I can post those methods here.

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  • Clone a DataBound Checked List Box

    - by Buddhi Dananjaya
    Hi I have a DataBound CheckedListBox, I "check" few items on list box(source), then I need to clone it to new Checked List Box(target). It need to have all the data, with checked state. I have tried with following function. It is properly flowing through this function. But finally I can see items on target CheckedListBox but none of the items in target is checked. private void CloneCheckedListBox(CheckedListBox source, CheckedListBox target) { foreach (int checkedItemIndex in source.CheckedIndices) { target.SetItemChecked(checkedItemIndex, true); } } Edit: I have a User control which I have placed on a TabPage, on that User Control there is a "CheckedListBox", I do need to create a new TabPage with the user entered value on selected(current) TabPage(on User Control) So, what I have done is, create a new Tab Page, get a Copy of the User Control calling it's "Clone()" method. In "Clone()" method need to have CheckedListBox cloning feature. Here is my Cloning Code, which is on User Control... public SearchMain Clone() { SearchMain smClone = new SearchMain(); smClone.txtManufacturers.Text = this.txtManufacturers.Text; smClone.udPriceFrom.Value = this.udPriceFrom.Value; smClone.udPriceTo.Value = this.udPriceTo.Value; smClone.chkOld.Checked = this.chkOld.Checked; smClone.chkPrx.Checked = this.chkPrx.Checked; smClone.chkDisc.Checked = this.chkDisc.Checked; smClone.chkStock.Checked = this.chkStock.Checked; smClone.chkFirstDes.Checked = this.chkFirstDes.Checked; smClone.chkFirstPN.Checked = this.chkFirstPN.Checked; smClone.txtSuppPN.Text = this.txtSuppPN.Text; smClone.txtManuPN.Text = this.txtManuPN.Text; smClone.txtManufacturers.Text = this.txtManufacturers.Text; smClone.meDesAND.Text = this.meDesAND.Text; smClone.meDesOR.Text = this.meDesOR.Text; smClone.meDesNOT.Text = this.meDesNOT.Text; smClone.lbManufacSelected.Items.AddRange(this.lbManufacSelected.Items); smClone.lbSearchWithIn.Items.AddRange(this.lbSearchWithIn.Items); **CloneCheckedListBox(this.clbLang, smClone.clbLang);** // CloneCheckedListBox(this.clbTypes, smClone.clbTypes); return smClone; }

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  • Properly setting up willSelectRowAtIndexPath and didSelectRowAtIndexPath to send cell selections

    - by Gordon Fontenot
    Feel like I'm going a bit nutty here. I have a detail view with a few stand-alone UITextFields, a few UITextFields in UITAbleViewCells, and one single UITableViewCell that will be used to hold notes, if there are any. I only want this cell selectable when I am in edit mode. When I am not in edit mode, I do not want to be able to select it. Selecting the cell (while in edit mode) will fire a method that will init a new view. I know this is very easy, but I am missing something somewhere. Here are the current selection methods I am using: -(NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath { if (!self.editing) { NSLog(@"Returning nil, not in edit mode"); return nil; } NSLog(@"Cell will be selected, not in edit mode"); if (indexPath.section == 0) { NSLog(@"Comments cell will be selected"); return indexPath; } return nil; } -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { if (!self.editing) { NSLog(@"Not in edit mode. Should not have made it this far."); return; } if (indexPath.section == 0) [self pushCommentsView]; else return; } My problem is really 2 fold; 1) Even when I'm not in edit mode, and I know I am returning nil (due to the NSLog message), I can still select the row (it flashes blue). From my understanding of the willSelectRowAtIndexPath method, this shouldn't be happening. Maybe I am wrong about this? 2) When I enter edit mode, I can't select anything at all. the willSelectRowAtIndexPath method never fires, and neither does the didSelectRowAtIndexPath. The only thing I am doing in the setEditing method, is hiding the back button while editing, and assigning firstResponder to the top textField to get the keyboard to pop up. I thought maybe the first responder was getting in the way of the click (which would be dumb), but even with that commented out, I cannot perform the cell selection during editing.

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  • python Socket.IO client for sending broadcast messages to TornadIO2 server

    - by Alp
    I am building a realtime web application. I want to be able to send broadcast messages from the server-side implementation of my python application. Here is the setup: socketio.js on the client-side TornadIO2 server as Socket.IO server python on the server-side (Django framework) I can succesfully send socket.io messages from the client to the server. The server handles these and can send a response. In the following i will describe how i did that. Current Setup and Code First, we need to define a Connection which handles socket.io events: class BaseConnection(tornadio2.SocketConnection): def on_message(self, message): pass # will be run if client uses socket.emit('connect', username) @event def connect(self, username): # send answer to client which will be handled by socket.on('log', function) self.emit('log', 'hello ' + username) Starting the server is done by a Django management custom method: class Command(BaseCommand): args = '' help = 'Starts the TornadIO2 server for handling socket.io connections' def handle(self, *args, **kwargs): autoreload.main(self.run, args, kwargs) def run(self, *args, **kwargs): port = settings.SOCKETIO_PORT router = tornadio2.TornadioRouter(BaseConnection) application = tornado.web.Application( router.urls, socket_io_port = port ) print 'Starting socket.io server on port %s' % port server = SocketServer(application) Very well, the server runs now. Let's add the client code: <script type="text/javascript"> var sio = io.connect('localhost:9000'); sio.on('connect', function(data) { console.log('connected'); sio.emit('connect', '{{ user.username }}'); }); sio.on('log', function(data) { console.log("log: " + data); }); </script> Obviously, {{ user.username }} will be replaced by the username of the currently logged in user, in this example the username is "alp". Now, every time the page gets refreshed, the console output is: connected log: hello alp Therefore, invoking messages and sending responses works. But now comes the tricky part. Problems The response "hello alp" is sent only to the invoker of the socket.io message. I want to broadcast a message to all connected clients, so that they can be informed in realtime if a new user joins the party (for example in a chat application). So, here are my questions: How can i send a broadcast message to all connected clients? How can i send a broadcast message to multiple connected clients that are subscribed on a specific channel? How can i send a broadcast message anywhere in my python code (outside of the BaseConnection class)? Would this require some sort of Socket.IO client for python or is this builtin with TornadIO2? All these broadcasts should be done in a reliable way, so i guess websockets are the best choice. But i am open to all good solutions.

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  • Java JMS Messaging

    - by London
    Hello, I have a working example of sending message to server and server receiving it via qpid messaging. Here is simple hello world to send to server : http://pastebin.com/M7mSECJn And here is server which receives requests and sends response(the current client doesn't receive response) : http://pastebin.com/2mEeuzrV Here is my property file : http://pastebin.com/TLEFdpXG They all work perfectly, I can see the messages in the qpid queue via Qpid JMX management console. These examples are downloaded from https://svn.apache.org/repos/asf/qpid/trunk/qpid/java/client/example (someone may need it also). I've done Jboss messaging using spring before, but I can't manage to do the same with qpid. With jboss inside applicationsContext I had beans jndiTemplate, conectionFactory, destinationQueue, and jmscontainer like this : <!-- Queue configuration --> <bean id="jndiTemplate" class="org.springframework.jndi.JndiTemplate"> <property name="environment"> <props> <prop key="java.naming.factory.initial">org.jnp.interfaces.NamingContextFactory</prop> <prop key="java.naming.provider.url">jnp://localhost:1099</prop> <prop key="java.naming.factory.url.pkgs">org.jboss.naming:org.jnp.interfaces</prop> <prop key="java.naming.security.principal">admin</prop> <prop key="java.naming.security.credentials">admin</prop> </props> </property> </bean> <bean id="connectionFactory" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiTemplate" ref="jndiTemplate" /> <property name="jndiName" value="ConnectionFactory" /> </bean> <bean id="queueDestination" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiTemplate" ref="jndiTemplate" /> <property name="jndiName"> <value>queue/testQueue</value> </property> </bean> <bean id="jmsContainer" class="org.springframework.jms.listener.DefaultMessageListenerContainer"> <property name="connectionFactory" ref="connectionFactory" /> <property name="destination" ref="queueDestination" /> <property name="messageListener" ref="listener" /> </bean> and of course sender and listener : Now I'd like to rewrite this qpid example using spring context logic. Can anyone help me?

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  • Global Entity Framework Context in WPF Application

    - by OffApps Cory
    Good day, I am in the middle of development of a WPF application that is using Entity Framework (.NET 3.5). It accesses the entities in several places throughout. I am worried about consistency throughout the application in regard to the entities. Should I be instancing separate contexts in my different views, or should I (and is a a good way to do this) instance a single context that can be accessed globally? For instance, my entity model has three sections, Shipments (with child packages and further child contents), Companies/Contacts (with child addresses and telephones), and disk specs. The Shipments and EditShipment views access the DiskSpecs, and the OptionsView manages the DiskSpecs (Create, Edit, Delete). If I edit a DiskSpec, I have to have something in the ShipmentsView to retrieve the latest specs if I have separate contexts right? If it is safe to have one overall context from which the rest of the app retrieves it's objects, then I imagine that is the way to go. If so, where would that instance be put? I am using VB.NET, but I can translate from C# pretty good. Any help would be appreciated. I just don't want one of those applications where the user has to hit reload a dozen times in different parts of the app to get the new data. Update: OK so I have changed my app as follows: All contexts are created in Using Blocks to dispose of them after they are no longer needed. When loaded, all entities are detatched from context before it is disposed. A new property in the MainViewModel (ContextUpdated) raises an event that all of the other ViewModels subscribe to which runs that ViewModels RefreshEntities method. After implementing this, I started getting errors saying that an entity can only be referenced by one ChangeTracker at a time. Since I could not figure out which context was still referencing the entity (shouldn't be any context right?) I cast the object as IEntityWithChangeTracker, and set SetChangeTracker to nothing (Null). This has let to the current problem: When I Null the changeTracker on the Entity, and then attach it to a context, it loses it's changed state and does not get updated to the database. However if I do not null the change tracker, I can't attach. I have my own change tracking code, so that is not a problem. My new question is, how are you supposed to do this. A good example Entity query and entity save code snipped would go a long way, cause I am beating my head in trying to get what I once thought was a simple transaction to work. Any help would elevate you to near god-hood.

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  • Convert JSON flattened for forms back to an object

    - by George Jempty
    I am required (please therefore no nit-picking the requirement, I've already nit-picked it, and this is the req) to convert certain form fields that have "object nesting" embedded in the field names, back to the object(s) themselves. Below are some typical form field names: phones_0_patientPhoneTypeId phones_0_phone phones_1_patientPhoneTypeId phones_1_phone The form fields above were derived from an object such as the one toward the bottom (see "Data"), and that is the format of the object I need to reassemble. It can be assumed that any form field with a name that contains the underscore _ character needs to undergo this conversion. Also that the segment of the form field between underscores, if numeric, signifies a Javascript array, otherwise an object. I found it easy to devise a (somewhat naive) implementation for the "flattening" of the original object for use by the form, but am struggling going in the other direction; below the object/data below I'm pasting my current attempt. One problem (perhaps the only one?) with it is that it does not currently properly account for array indexes, but this might be tricky because the object will subsequently be encoded as JSON, which will not account for sparse arrays. So if "phones_1" exists, but "phones_0" does not, I would nevertheless like to ensure that a slot exists for phones[0] even if that value is null. Implementations that tweak what I have begun, or are entirely different, encouraged. If interested let me know if you'd like to see my code for the "flattening" part that is working. Thanks in advance Data: var obj = { phones: [{ "patientPhoneTypeId": 4, "phone": "8005551212" }, { "patientPhoneTypeId": 2, "phone": "8885551212" }]}; Code to date: var unflattened = {}; for (var prop in values) { if (prop.indexOf('_') > -1) { var lastUnderbarPos = prop.lastIndexOf('_'); var nestedProp = prop.substr(lastUnderbarPos + 1); var nesting = prop.substr(0, lastUnderbarPos).split("_"); var nestedRef, isArray, isObject; for (var i=0, n=nesting.length; i<n; i++) { if (i===0) { nestedRef = unflattened; } if (i < (n-1)) { // not last if (/^\d+$/.test(nesting[i+1])) { isArray = true; isObject = false; } else { isArray = true; isObject = false; } var currProp = nesting[i]; if (!nestedRef[currProp]) { if (isArray) { nestedRef[currProp] = []; } else if (isObject) { nestedRef[currProp] = {}; } } nestedRef = nestedRef[currProp]; } else { nestedRef[nestedProp] = values[prop]; } } }

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  • Problems doing asynch operations in C# using Mutex.

    - by firoso
    I've tried this MANY ways, here is the current iteration. I think I've just implemented this all wrong. What I'm trying to accomplish is to treat this Asynch result in such a way that until it returns AND I finish with my add-thumbnail call, I will not request another call to imageProvider.BeginGetImage. To Clarify, my question is two-fold. Why does what I'm doing never seem to halt at my Mutex.WaitOne() call, and what is the proper way to handle this scenario? /// <summary> /// re-creates a list of thumbnails from a list of TreeElementViewModels (directories) /// </summary> /// <param name="list">the list of TreeElementViewModels to process</param> public void BeginLayout(List<AiTreeElementViewModel> list) { // *removed code for canceling and cleanup from previous calls* // Starts the processing of all folders in parallel. Task.Factory.StartNew(() => { thumbnailRequests = Parallel.ForEach<AiTreeElementViewModel>(list, options, ProcessFolder); }); } /// <summary> /// Processes a folder for all of it's image paths and loads them from disk. /// </summary> /// <param name="element">the tree element to process</param> private void ProcessFolder(AiTreeElementViewModel element) { try { var images = ImageCrawler.GetImagePaths(element.Path); AsyncCallback callback = AddThumbnail; foreach (var image in images) { Console.WriteLine("Attempting Enter"); synchMutex.WaitOne(); Console.WriteLine("Entered"); var result = imageProvider.BeginGetImage(callback, image); } } catch (Exception exc) { Console.WriteLine(exc.ToString()); // TODO: Do Something here. } } /// <summary> /// Adds a thumbnail to the Browser /// </summary> /// <param name="result">an async result used for retrieving state data from the load task.</param> private void AddThumbnail(IAsyncResult result) { lock (Thumbnails) { try { Stream image = imageProvider.EndGetImage(result); string filename = imageProvider.GetImageName(result); string imagePath = imageProvider.GetImagePath(result); var imageviewmodel = new AiImageThumbnailViewModel(image, filename, imagePath); thumbnailHash[imagePath] = imageviewmodel; HostInvoke(() => Thumbnails.Add(imageviewmodel)); UpdateChildZoom(); //synchMutex.ReleaseMutex(); Console.WriteLine("Exited"); } catch (Exception exc) { Console.WriteLine(exc.ToString()); // TODO: Do Something here. } } }

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  • Lucene.NET search index approach

    - by Tim Peel
    Hi, I am trying to put together a test case for using Lucene.NET on one of our websites. I'd like to do the following: Index in a single unique id. Index across a comma delimitered string of terms or tags. For example. Item 1: Id = 1 Tags = Something,Separated-Term I will then be structuring the search so I can look for documents against tag i.e. tags:something OR tags:separate-term I need to maintain the exact term value in order to search against it. I have something running, and the search query is being parsed as expected, but I am not seeing any results. Here's some code. My parser (_luceneAnalyzer is passed into my indexing service): var parser = new QueryParser(Lucene.Net.Util.Version.LUCENE_CURRENT, "Tags", _luceneAnalyzer); parser.SetDefaultOperator(QueryParser.Operator.AND); return parser; My Lucene.NET document creation: var doc = new Document(); var id = new Field( "Id", NumericUtils.IntToPrefixCoded(indexObject.id), Field.Store.YES, Field.Index.NOT_ANALYZED, Field.TermVector.NO); var tags = new Field( "Tags", string.Join(",", indexObject.Tags.ToArray()), Field.Store.NO, Field.Index.ANALYZED, Field.TermVector.YES); doc.Add(id); doc.Add(tags); return doc; My search: var parser = BuildQueryParser(); var query = parser.Parse(searchQuery); var searcher = Searcher; TopDocs hits = searcher.Search(query, null, max); IList<SearchResult> result = new List<SearchResult>(); float scoreNorm = 1.0f / hits.GetMaxScore(); for (int i = 0; i < hits.scoreDocs.Length; i++) { float score = hits.scoreDocs[i].score * scoreNorm; result.Add(CreateSearchResult(searcher.Doc(hits.scoreDocs[i].doc), score)); } return result; I have two documents in my index, one with the tag "Something" and one with the tags "Something" and "Separated-Term". It's important for the - to remain in the terms as I want an exact match on the full value. When I search with "tags:Something" I do not get any results. Question What Analyzer should I be using to achieve the search index I am after? Are there any pointers for putting together a search such as this? Why is my current search not returning any results? Many thanks

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  • "Wrapping" a BindingList<T> propertry with a List<T> property for serialization.

    - by Eric
    I'm writing an app that allows users search and browse catalogs of widgets. My WidgetCatalog class is serialized and deserialized to and from XML files using DataContractSerializer. My app is working now but I think I can make the code a lot more efficient if I started taking advantage of data binding rather then doing everything manually. Here's a stripped down version of my current WidgetCatalog class. [DataContract(Name = "WidgetCatalog")] class WidgetCatalog { [DataContract(Name = "Name")] public string Name { get; set; } [DataContract(Name = "Widgets")] public List<Widget> Widgets { get; set; } } I had to write a lot of extra code to keep my UI in sync when widgets are added or removed from a catalog, or their internal properties change. I'm pretty inexperienced with data-binding, but I think I want a BindingList<Widget> rather than a plain old List<Widget>. Is this right? In the past when I had similar needs I found that BindingList<T> does not serialize very well. Or at least the Event Handers between the items and the list are not serialized. I was using XmlSerializer though, and DataContractSerializer may work better. So I'm thinking of doing something like the code below. [DataContract(Name = "WidgetCatalog")] class WidgetCatalog { [DataMember(Name = "Name")] public string Name { get; set; } [DataMember(Name = "Widgets")] private List<Widget> WidgetSerializationList { get { return this._widgetBindingList.ToList<Widget>(); } set { this._widgetBindingList = new BindingList<Widget>(value); } } //these do not get serialized private BindingList<Widget> _widgetBindingList; public BindingList<Widget> WidgetBindingList { get { return this._widgetBindingList; } } public WidgetCatalog() { this.WidgetSerializationList = new List<Widget>(); } } So I'm serializing a private List<Widget> property, but the GET and SET accessors of the property are reading from, and writing to theBindingList<Widget> property. Will this even work? It seems like there should be a better way to do this.

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  • How do I copy all referenced jars of an eclipse project using ant4eclipse?

    - by interstellar
    I've tried like this (link): <taskdef resource="net/sf/antcontrib/antlib.xml" /> <taskdef resource="net/sf/ant4eclipse/antlib.xml" /> <target name="copy_jars"> <getEclipseClasspath workspace="${basedir}/.." projectname="MyProject" property="classpath" relative="false" runtime="true" pathseparator="#" /> <!-- iterate over all classpath entries --> <foreach list="${classpath}" delimiter="#" target="copy_jar_file" param="classpath.entry" /> </target> <target name="copy_jar_file"> <!-- check if current is a .jar-file ... --> <if> <isfileselected file="${classpath.entry}"> <filename name="**/*.jar" /> </isfileselected> <then> <!-- copy the jar file to a destination directory --> <copy file="${classpath.entry}" tofile="${dest.dir}"/> </then> </if> </target> But I get the exception: [getEclipseClasspath] net.sf.ant4eclipse.model.FileParserException: Could not parse plugin project 'E:\...\MyProject' since it contains neither a Bundle-Manifest nor a plugin.xml! [getEclipseClasspath] at net.sf.ant4eclipse.model.pdesupport.plugin.PluginDescriptorParser.parseEclipseProject(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.model.pdesupport.plugin.PluginProjectRoleIdentifier.applyRole(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.model.roles.RoleIdentifierRegistry.applyRoles(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.tools.ProjectFactory.readProjectFromWorkspace(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.tools.resolver.AbstractClasspathResolver.resolveEclipseClasspathEntry(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.tools.resolver.AbstractClasspathResolver.resolveProjectClasspath(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.tools.resolver.ProjectClasspathResolver.resolveProjectClasspath(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.ant.task.project.GetEclipseClassPathTask.resolvePath(Unknown Source) [getEclipseClasspath] at net.sf.ant4eclipse.ant.task.project.AbstractGetProjectPathTask.execute(Unknown Source) [getEclipseClasspath] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288) [getEclipseClasspath] at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source) [getEclipseClasspath] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) [getEclipseClasspath] at java.lang.reflect.Method.invoke(Method.java:597) [getEclipseClasspath] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:105) [getEclipseClasspath] at org.apache.tools.ant.Task.perform(Task.java:348) [getEclipseClasspath] at org.apache.tools.ant.Target.execute(Target.java:357) [getEclipseClasspath] at org.apache.tools.ant.Target.performTasks(Target.java:385) [getEclipseClasspath] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1329) [getEclipseClasspath] at org.apache.tools.ant.Project.executeTarget(Project.java:1298) [getEclipseClasspath] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) [getEclipseClasspath] at org.eclipse.ant.internal.ui.antsupport.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32) [getEclipseClasspath] at org.apache.tools.ant.Project.executeTargets(Project.java:1181) [getEclipseClasspath] at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.run(InternalAntRunner.java:423) [getEclipseClasspath] at org.eclipse.ant.internal.ui.antsupport.InternalAntRunner.main(InternalAntRunner.java:137) BUILD FAILED E:\...\build.xml:132: Exception whilst resolving the classpath of project MyProject! Reason: Could not parse plugin project 'E:\...\MyProject' since it contains neither a Bundle-Manifest nor a plugin.xml! I wan't to copy just the jars, not the referenced projects. Is there a way to parametrize the task getEclipseClasspath so it only gets the jars, not the projects?

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  • Git for Websites / post-receive / Separation of Test and Production Sites

    - by Walt W
    Hi all, I'm using Git to manage my website's source code and deployment, and currently have the test and live sites running on the same box. Following this resource http://toroid.org/ams/git-website-howto originally, I came up with the following post-receive hook script to differentiate between pushes to my live site and pushes to my test site: while read ref do #echo "Ref updated:" #echo $ref -- would print something like example at top of file result=`echo $ref | gawk -F' ' '{ print $3 }'` if [ $result != "" ]; then echo "Branch found: " echo $result case $result in refs/heads/master ) git --work-tree=c:/temp/BLAH checkout -f master echo "Updated master" ;; refs/heads/testbranch ) git --work-tree=c:/temp/BLAH2 checkout -f testbranch echo "Updated testbranch" ;; * ) echo "No update known for $result" ;; esac fi done echo "Post-receive updates complete" However, I have doubts that this is actually safe :) I'm by no means a Git expert, but I am guessing that Git probably keeps track of the current checked-out branch head, and this approach probably has the potential to confuse it to no end. So a few questions: IS this safe? Would a better approach be to have my base repository be the test site repository (with corresponding working directory), and then have that repository push changes to a new live site repository, which has a corresponding working directory to the live site base? This would also allow me to move the production to a different server and keep the deployment chain intact. Is there something I'm missing? Is there a different, clean way to differentiate between test and production deployments when using Git for managing websites? As an additional note in light of Vi's answer, is there a good way to do this that would handle deletions without mucking with the file system much? Thank you, -Walt PS - The script I came up with for the multiple repos (and am using unless I hear better) is as follows: sitename=`basename \`pwd\`` while read ref do #echo "Ref updated:" #echo $ref -- would print something like example at top of file result=`echo $ref | gawk -F' ' '{ print $3 }'` if [ $result != "" ]; then echo "Branch found: " echo $result case $result in refs/heads/master ) git checkout -q -f master if [ $? -eq 0 ]; then echo "Test Site checked out properly" else echo "Failed to checkout test site!" fi ;; refs/heads/live-site ) git push -q ../Live/$sitename live-site:master if [ $? -eq 0 ]; then echo "Live Site received updates properly" else echo "Failed to push updates to Live Site" fi ;; * ) echo "No update known for $result" ;; esac fi done echo "Post-receive updates complete" And then the repo in ../Live/$sitename (these are "bare" repos with working trees added after init) has the basic post-receive: git checkout -f if [ $? -eq 0 ]; then echo "Live site `basename \`pwd\`` checked out successfully" else echo "Live site failed to checkout" fi

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  • Inline-editing: onBlur prevents onClick from being triggered (jQuery)

    - by codethief
    Hello StackOverflow community! I'm currently working on my own jQuery plugin for inline-editing as those that already exist don't fit my needs. Anyway, I'd like to give the user the following (boolean) options concerning the way editing is supposed to work: submit_button reset_on_blur Let's say the user would like to have a submit button (submit_button = true) and wants the inline input element to be removed as soon as it loses focus (reset_on_blur = true). This leads to an onClick handler being registered for the button and an onBlur handler being registered for the input element. Every time the user clicks the button, however, the onBlur handler is also triggered and results in the edit mode being left, i.e. before the onClick event occurs. This makes submitting impossible. FYI, the HTML in edit mode looks like this: <td><input type="text" class="ie-input" value="Current value" /><div class="ie-content-backup" style="display: none;">Backup Value</div><input type="submit" class="ie-button-submit" value="Save" /></td> So, is there any way I could check in the onBlur handler if the focus was lost while activating the submit button, so that edit mode isn't left before the submit button's onClick event is triggered? I've also tried to register a $('body').click() handler to simulate blur and to be able to trace back which element has been clicked, but that didn't work either and resulted in rather strange bugs: $('html').click(function(e) { // body doesn't span over full page height, use html instead // Don't reset if the submit button, the input element itself or the element to be edited inline was clicked. if(!$(e.target).hasClass('ie-button-submit') && !$(e.target).hasClass('ie-input') && $(e.target).get(0) != element.get(0)) { cancel(element); } }); jEditable uses the following piece of code. I don't like this approach, though, because of the delay. Let alone I don't even understand why this works. ;) input.blur(function(e) { /* prevent canceling if submit was clicked */ t = setTimeout(function() { reset.apply(form, [settings, self]); }, 500); }); Thanks in advance!

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  • UIImagePickerController Memory Leak

    - by Watson
    I am seeing a huge memory leak when using UIImagePickerController in my iPhone app. I am using standard code from the apple documents to implement the control: UIImagePickerController* imagePickerController = [[UIImagePickerController alloc] init]; imagePickerController.delegate = self; if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { switch (buttonIndex) { case 0: imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera; [self presentModalViewController:imagePickerController animated:YES]; break; case 1: imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; [self presentModalViewController:imagePickerController animated:YES]; break; default: break; } } And for the cancel: -(void) imagePickerControllerDidCancel:(UIImagePickerController *)picker { [[picker parentViewController] dismissModalViewControllerAnimated: YES]; [picker release]; } The didFinishPickingMediaWithInfo callback is just as stanard, although I do not even have to pick anything to cause the leak. Here is what I see in instruments when all I do is open the UIImagePickerController, pick photo library, and press cancel, repeatedly. As you can see the memory keeps growing, and eventually this causes my iPhone app to slow down tremendously. As you can see I opened the image picker 24 times, and each time it malloc'd 128kb which was never released. Basically 3mb out of my total 6mb is never released. This memory stays leaked no matter what I do. Even after navigating away from the current controller, is remains the same. I have also implemented the picker control as a singleton with the same results. Here is what I see when I drill down into those two lines: Any help here would be greatly appreciated! Again, I do not even have to choose an image. All I do is present the controller, and press cancel. Update 1 I downloaded and ran apple's example of using the UIIMagePickerController and I see the same leak happening there when running instruments (both in simulator and on the phone). http://developer.apple.com/library/ios/#samplecode/PhotoPicker/Introduction/Intro.html%23//apple_ref/doc/uid/DTS40010196 All you have to do is hit the photo library button and hit cancel over and over, you'll see the memory keep growing. Any ideas? Update 2 I only see this problem when viewing the photo library. I can choose take photo, and open and close that one over and over, without a leak.

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  • Visual Studio Express 2012 debug mode doesn't work

    - by user2350086
    I have a project in Visual Studio that I have been working on for a while, and I have used the debugger extensively. Recently I changed some settings and I have lost the ability to stop the program and step through code. I can't figure out what I had changed that might have affected this. If I put a breakpoint in my code and try to have the program stop there, it doesn't. The break point shows up white with a red outline. If I hover the mouse over it, it says "The breakpoint will not currently be hit. No executable code of the debugger's target code type is associated with this line. Possible causes include: conditional compilation, compiler optimizations, or the target architecture of this line is not supported by the current debugger code type." I know for a fact that the program executes the code where the breakpoint is because I put the breakpoint in the beginning of the InitializeComponent method. The program displays the window fine, but does not stop at the breakpoint. Yes, I am running in debug mode. It seems as though there is a disconnect between the compiled code and the source code displayed. Does anyone know what that would be, or know which compiler settings I should check to re-enable debugging? Here are the compiler options: /GS /analyze- /W3 /Zc:wchar_t /I"D:\dev\libcurl-7.19.3-win32-ssl-msvc\include" /Zi /Od /sdl /Fd"Debug\vc110.pdb" /fp:precise /D "WIN32" /D "_DEBUG" /D "_UNICODE" /D "UNICODE" /errorReport:prompt /WX- /Zc:forScope /Oy- /clr /FU"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\mscorlib.dll" /FU"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\System.Data.dll" /FU"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\System.dll" /FU"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\System.Drawing.dll" /FU"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\System.Windows.Forms.DataVisualization.dll" /FU"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\System.Windows.Forms.dll" /FU"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.5\System.Xml.dll" /MDd /Fa"Debug\" /EHa /nologo /Fo"Debug\" /Fp"Debug\Prog.pch" The linker options are: /OUT:"D:\dev\Prog\Debug\Prog.exe" /MANIFEST /NXCOMPAT /PDB:"D:\dev\Prog\Debug\Prog.pdb" /DYNAMICBASE "curllib.lib" "winmm.lib" "kernel32.lib" "user32.lib" "gdi32.lib" "winspool.lib" "comdlg32.lib" "advapi32.lib" "shell32.lib" "ole32.lib" "oleaut32.lib" "uuid.lib" "odbc32.lib" "odbccp32.lib" /FIXED:NO /DEBUG /MACHINE:X86 /ENTRY:"Main" /INCREMENTAL /PGD:"D:\dev\Prog\Debug\Prog.pgd" /SUBSYSTEM:WINDOWS /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /ManifestFile:"Debug\Prog.exe.intermediate.manifest" /ERRORREPORT:PROMPT /NOLOGO /LIBPATH:"D:\dev\libcurl-7.19.3-win32-ssl-msvc\lib\Debug" /ASSEMBLYDEBUG /TLBID:1

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  • Creating meaningful routes in wizard style ASP.NET MVC form

    - by R0MANARMY
    I apologize in advance for a long question, figured better have a bit more information than not enough. I'm working on an application with a fairly complex form (~100 fields on it). In order to make the UI a little more presentable the fields are organized into regions and split across multiple (~10) tabs (not unlike this, but each tab does a submit/redirect to next tab). This large input form can also be in one of 3 views (read only, editable, print friendly). The form represents a large domain object (let's call it Foo). I have a controller for said domain object (FooController). It makes sense to me to have the controller be responsible for all the CRUD related operations. Here are the problems I'm having trouble figuring out. Goals: I'd like to keep to conventions so that Foo/Create creates a new record Foo/Delete deletes a record Foo/Edit/{foo_id} takes you to the first tab of the form ...etc I'd like to be able to not repeat the data access code such that I can have Foo/Edit/{foo_id}/tab1 Foo/View/{foo_id}/tab1 Foo/Print/{foo_id}tab1 ...etc use the same data access code to get the data and just specify which view to use to render it. My current implementation has a massive FooController with Create, Delete, Tab1, Tab2, etc actions. Tab actions are split out into separate files for organization (using partial classes, which may or may not be abuse of partial classes). Problem I'm running into is how to organize my controller(s) and routes to make that happen. I have the default route {controller}/{action}/{id} Which handles goal 1 properly but doesn't quite play nice with goal 2. I tried to address goal 2 by defining extra routes like so: routes.MapRoute( "FooEdit", "Foo/Edit/{id}/{action}", new { controller = "Foo", action = "Tab1", mode = "Edit", id = (string)null } ); routes.MapRoute( "FooView", "Foo/View/{id}/{action}", new { controller = "Foo", action = "Tab1", mode = "View", id = (string)null } ); routes.MapRoute( "FooPrint", "Foo/Print/{id}/{action}", new { controller = "Foo", action = "Tab1", mode = "Print", id = (string)null } ); However defining these extra routes causes the Url.Action to generate routs like Foo/Edit/Create instead of Foo/Create. That leads me to believe I designed something very very wrong, but this is my first attempt an asp.net mvc project and I don't know any better. Any advice with this particular situation would be awesome, but feedback on design in similar projects is welcome.

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  • Creating thousands of records in Rails

    - by willCosgrove
    Let me set the stage: My application deals with gift cards. When we create cards they have to have a unique string that the user can use to redeem it with. So when someone orders our gift cards, like a retailer, we need to make a lot of new card objects and store them in the DB. With that in mind, I'm trying to see how quickly I can have my application generate 100,000 Cards. Database expert, I am not, so I need someone to explain this little phenomena: When I create 1000 Cards, it takes 5 seconds. When I create 100,000 cards it should take 500 seconds right? Now I know what you're wanting to see, the card creation method I'm using, because the first assumption would be that it's getting slower because it's checking the uniqueness of a bunch of cards, more as it goes along. But I can show you my rake task desc "Creates cards for a retailer" task :order_cards, [:number_of_cards, :value, :retailer_name] => :environment do |t, args| t = Time.now puts "Searching for retailer" @retailer = Retailer.find_by_name(args[:retailer_name]) puts "Retailer found" puts "Generating codes" value = args[:value].to_i number_of_cards = args[:number_of_cards].to_i codes = [] top_off_codes(codes, number_of_cards) while codes != codes.uniq codes.uniq! top_off_codes(codes, number_of_cards) end stored_codes = Card.all.collect do |c| c.code end while codes != (codes - stored_codes) codes -= stored_codes top_off_codes(codes, number_of_cards) end puts "Codes are unique and generated" puts "Creating bundle" @bundle = @retailer.bundles.create!(:value => value) puts "Bundle created" puts "Creating cards" @bundle.transaction do codes.each do |code| @bundle.cards.create!(:code => code) end end puts "Cards generated in #{Time.now - t}s" end def top_off_codes(codes, intended_number) (intended_number - codes.size).times do codes << ReadableRandom.get(CODE_LENGTH) end end I'm using a gem called readable_random for the unique code. So if you read through all of that code, you'll see that it does all of it's uniqueness testing before it ever starts creating cards. It also writes status updates to the screen while it's running, and it always sits for a while at creating. Meanwhile it flies through the uniqueness tests. So my question to the stackoverflow community is: Why is my database slowing down as I add more cards? Why is this not a linear function in regards to time per card? I'm sure the answer is simple and I'm just a moron who knows nothing about data storage. And if anyone has any suggestions, how would you optimize this method, and how fast do you think you could get it to create 100,000 cards? (When I plotted out my times on a graph and did a quick curve fit to get my line formula, I calculated how long it would take to create 100,000 cards with my current code and it says 5.5 hours. That maybe completely wrong, I'm not sure. But if it stays on the line I curve fitted, it would be right around there.)

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  • Universal iPad App rejected because of launch crash that I can't reproduce

    - by Enrique R.
    Hello everyone, I'm very frustrated with this problem. After one week of waiting my universal iPad app has been rejected because "is crashing on launch on iPad running iPhone OS 3.2 and iPhone 3GS running iPhone OS 3.1.3 and Mac OS X 10.6.2." Unfortunately I can't replicate the problem, I've tested in debug and release modes and the app works just fine. I even created an ad-hoc configuration and test it in other devices and everything works fine. I should clarify that this is an update to a current iPhone application and I'm using the same distribution profile as the original iPhone app. Also, I checked everything before building the universal app following this entry: http://iphonedevelopment.blogspot.com/2010/04/converting-iphone-apps-to-universal.html Here are the crash logs that Apple sent me: Incident Identifier: 3E0D4A3B-2896-444D-BCBE-6C0CA1A66A90 CrashReporter Key: 18b5124ea5f657227c5f202a27ed707379b3e2e7 Process: Transfer [982] Path: /var/mobile/Applications/E9062465-7EA6-424C-9C61-D9DBCC7C915A/Transfer.app/Transfer Identifier: Transfer Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2010-05-04 15:35:57.399 -0700 OS Version: iPhone OS 3.1.3 (7E18) Report Version: 104 Exception Type: EXC_BAD_INSTRUCTION (SIGILL) Exception Codes: 0x00000001, 0x3eaa2188 Highlighted Thread: 0 Backtrace not available Unknown thread crashed with ARM Thread State: r0: 0x00002f90 r1: 0x00000000 r2: 0x385242d8 r3: 0x0000010d r4: 0x00000000 r5: 0x00000000 r6: 0x00000000 r7: 0x00000000 r8: 0x2ffffba0 r9: 0x2fffef90 r10: 0x00000000 r11: 0x00000000 ip: 0x0000000c sp: 0x2ffffba4 lr: 0x2fe08727 pc: 0x00002f94 cpsr: 0x40000010 Binary Images: 0x1000 - 0x25fff +Transfer armv7 /var/mobile/Applications/E9062465-7EA6-424C-9C61-D9DBCC7C915A/Transfer.app/Transfer 0x2fe00000 - 0x2fe24fff dyld armv7 /usr/lib/dyld .... And the one for the iPad: Incident Identifier: 3B170A28-C8E2-4018-8166-E69432A65070 CrashReporter Key: 4a0194e3f60559127faef2b014df605e4c47b981 Hardware Model: iPad1,1 Process: Transfer [533] Path: /var/mobile/Applications/400EE394-7BEE-45CA-942D-DBDC106360FF/Transfer.app/Transfer Identifier: Transfer Version: ??? (???) Code Type: ARM (Native) Parent Process: launchd [1] Date/Time: 2010-05-04 15:37:17.505 -0700 OS Version: iPhone OS 3.2 (7B367) Report Version: 104 Exception Type: 00000020 Exception Codes: 0x8badf00d Highlighted Thread: 0 Application Specific Information: com.erclab.iphone.photodownload failed to launch in time elapsed total CPU time (seconds): 1.150 (user 0.560, system 0.590), 6% CPU elapsed application CPU time (seconds): 0.150, 1% CPU Thread 0: 0 libobjc.A.dylib 0x33561996 0x33560000 + 6550 1 libobjc.A.dylib 0x33564986 0x33560000 + 18822 2 libobjc.A.dylib 0x33564cb2 0x33560000 + 19634 ... The app does not do anything other than loading a local HTML into a web view after the app it's launched so I don't understand why it says "failed to launch in time" Any help will be very much appreciated.

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  • i had problem in adding the additional content in my pdf

    - by Ayyappan.Anbalagan
    I am converting my data set into a pdf document.My data set contains the product bill details.So,at the top of the pdf i need to added some more content like "my company name & address customer name, date of bill,bill no" Below code i am using to convert into pdf. public static void Exportdata(DataTable dataTable, HttpResponse Response, int val) { //String filename = String.Concat(name, "-", DateTime.Today.Day.ToString(), "/", DateTime.Today.Month.ToString(), "/", DateTime.Today.Year.ToString(), ".pdf"); Document pdfDoc = new Document(PageSize.A4, 30, 30, 40, 25); System.IO.MemoryStream mStream = new System.IO.MemoryStream(); PdfWriter writer = PdfWriter.GetInstance(pdfDoc, mStream); //int cols = 0; //int rows = 0; int cols = dataTable.Columns.Count; int rows = dataTable.Rows.Count; pdfDoc.Open(); iTextSharp.text.Table pdfTable = new iTextSharp.text.Table(cols, rows); pdfTable.BorderWidth = 1; pdfTable.Width = 100; pdfTable.Padding = 1; pdfTable.Spacing = 1; //creating table headers for (int i = 0; i < cols; i++) { Cell cellCols = new Cell(); Font ColFont = FontFactory.GetFont(FontFactory.HELVETICA, 8, Font.BOLD); Chunk chunkCols = new Chunk(dataTable.Columns[i].ColumnName, ColFont); cellCols.Add(chunkCols); pdfTable.AddCell(cellCols); } //creating table data (actual result) for (int k = 0; k < rows; k++) { for (int j = 0; j < cols; j++) { Cell cellRows = new Cell(); Font RowFont = FontFactory.GetFont(FontFactory.HELVETICA, 6); Chunk chunkRows = new Chunk(dataTable.Rows[k][j].ToString(), RowFont); cellRows.Add(chunkRows); pdfTable.AddCell(cellRows); } } pdfDoc.Add(pdfTable); pdfDoc.Close(); Response.ContentType = "application/octet-stream"; if (val == 1) { Response.AddHeader("Content-Disposition", "attachment; filename=Users.pdf"); } else if (val == 2) { Response.AddHeader("Content-Disposition", "attachment; filename=Customers.pdf"); } else if (val == 3) { Response.AddHeader("Content-Disposition", "attachment; filename=Materials.pdf"); } else { Response.AddHeader("Content-Disposition", "attachment; filename=Reports.pdf"); } Response.Clear(); Response.BinaryWrite(mStream.ToArray()); //Response.Write(mStream.ToString()); HttpContext.Current.ApplicationInstance.CompleteRequest(); Response.End(); }

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