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  • find(:all) and then add data from another table to the object

    - by Koning Baard XIV
    I have two tables: create_table "friendships", :force => true do |t| t.integer "user1_id" t.integer "user2_id" t.boolean "hasaccepted" t.datetime "created_at" t.datetime "updated_at" end and create_table "users", :force => true do |t| t.string "email" t.string "password" t.string "phone" t.boolean "gender" t.datetime "created_at" t.datetime "updated_at" t.string "firstname" t.string "lastname" t.date "birthday" end I need to show the user a list of Friendrequests, so I use this method in my controller: def getfriendrequests respond_to do |format| case params[:id] when "to_me" @friendrequests = Friendship.find(:all, :conditions => { :user2_id => session[:user], :hasaccepted => false }) when "from_me" @friendrequests = Friendship.find(:all, :conditions => { :user1_id => session[:user], :hasaccepted => false }) end format.xml { render :xml => @friendrequests } format.json { render :json => @friendrequests } end end I do nearly everything using AJAX, so to fetch the First and Last name of the user with UID user2_id (the to_me param comes later, don't worry right now), I need a for loop which make multiple AJAX calls. This sucks and costs much bandwidth. So I'd rather like that getfriendrequests also returns the First and Last name of the corresponding users, so, e.g. the JSON response would not be: [ { "friendship": { "created_at": "2010-02-19T13:51:31Z", "user1_id": 2, "updated_at": "2010-02-19T13:51:31Z", "hasaccepted": false, "id": 11, "user2_id": 3 } }, { "friendship": { "created_at": "2010-02-19T16:31:23Z", "user1_id": 2, "updated_at": "2010-02-19T16:31:23Z", "hasaccepted": false, "id": 12, "user2_id": 4 } } ] but rather: [ { "friendship": { "created_at": "2010-02-19T13:51:31Z", "user1_id": 2, "updated_at": "2010-02-19T13:51:31Z", "hasaccepted": false, "id": 11, "user2_id": 3, "firstname": "Jon", "lastname": "Skeet" } }, { "friendship": { "created_at": "2010-02-19T16:31:23Z", "user1_id": 2, "updated_at": "2010-02-19T16:31:23Z", "hasaccepted": false, "id": 12, "user2_id": 4, "firstname": "Mark", "lastname": "Gravell" } } ] I thought of a for loop in the getfriendrequests method, but I don't know how to implement this, and maybe there is an easier way. It must also work for XML. Can anyone help me? Thanks

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  • how to work with strings and integers as bit strings in python?

    - by Manuel
    Hello! I'm developing a Genetic Algorithm in python were chromosomes are composed of strings and integers. To apply the genetic operations, I want to convert these groups of integers and strings into bit strings. For example, if one chromosome is: ["Hello", 4, "anotherString"] I'd like it to become something like: 0100100100101001010011110011 (this is not actual translation). So... How can I do this? Chromosomes will contain the same amount of strings and integers, but this numbers can vary from one algorithm run to another. To be clear, what I want to obtain is the bit representation of each element in the chromosome concatenated. If you think this would not be the best way to apply genetic operators (such as mutation and simple crossover) just tell me! I'm open to new ideas. Thanks a lot! Manuel

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  • Load SWF data without loading sound, then load sound later

    - by Jon Sandness
    So, hypothetical situation here: I have an SWF that's 30MB. Sound files (music) make up 25MB, art and other things make up the remaining 5MB. Would it be possible for me to load the 5MB of necessary art and other things first to allow the user to operate the app, then after that's all loaded and they are operating the app, load the remaining 25MB of sound files in the background? UPDATE: Loading SWF externally is not an option.

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  • Compression File

    - by Pedro Magalhaes
    Hi, I have a X bytes file. And I want to compress it in block of size 32Kb, for example. Is there any lib that Can I do this? I used Zlib for Delphi but I just can compress a full file in new compressed file. Tranks a lot, Pedro

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  • How to handle data output in an Observer?

    - by Mannaz
    I have an Observable and an Observer. The observable does download some stuff in a background thread and calls notifyObservers to let the observers read the status. At some point in public void update the observer tries to updates the GUI ((TextView)findViewById('R.id.foo')).setText("bar"); but it seems like the observable thread calls this method, because the Observable (!!!) throws this: android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. at android.view.ViewRoot.checkThread(ViewRoot.java:2462) at android.view.ViewRoot.requestLayout(ViewRoot.java:512) ... at com.mynamespace.acitivty.TrackActivity.startPlay(TrackActivity.java:72) at com.mynamespace.acitivty.TrackActivity.update(TrackActivity.java:107) at java.util.Observable.notifyObservers(Observable.java:147) at java.util.Observable.notifyObservers(Observable.java:128) at com.mynamespace.module.communication.Download.stateChanged(Download.java:213) at com.mynamespace.module.communication.Download.run(Download.java:186) at java.lang.Thread.run(Thread.java:1058) Is there some way I can prevent this from happening? I'm sure I'm missing something obvious here.

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  • How does a hash table work?

    - by Arec Barrwin
    I'm looking for an explanation of how a hashtable works - in plain English for a simpleton like me! For example I know it takes the key, calculates the hash (how?) and then performs some kind of modulo to work out where it lies in the array that the value is stored, but that's where my knowledge stops. Could anyone clarify the process. Edit: I'm not looking specifically about how hashcodes are calculated, but a general overview of how a hashtable works.

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  • PHP Doctrine: Custom nested set?

    - by ropstah
    Is it possible to have nested set capabilities in this somewhat custom setup? Consider these 4 tables: Object: (oid, name) contains: [1, 'Licence'] and [2, 'Exemption'] Licence: (lid, name) Exemption: (eid, name) Cost: (oid, oid_ref, cost_oid, cost_oid_ref) For: P = Licence with lid [1] R = Exemption with eid [2] i can say "object P is a parent to object R" if the following Cost record exists: [oid: 2 oid_ref: 2 cost_oid: 1 cost_oid_ref: 1] I understand that this creates somesort of 'conditional foreign key' relation which I need to define in code. Is it possible to have the nested set loaded with these conditions?

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  • How to Retrive data from XML Using XMLReader in C#

    - by Suryakavitha
    Hi, I am using windows application and i have four combo boxes(comboeventname,combosendtype,comboType,comboschedule) in that form.... I have stored that combo values in to XML file by using XML writer... now i want to display tha datas in that combo boxes in form load event when form opns in run time... How to retrive that values from that XML file and how to display that datas in combo boxes while run time... How shall i do this? Anyone tell me the solution of this..... Thanks in Advance...

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  • Problem with updating data in asp .NET MVC 2 application

    - by Bojan
    Hello everyone, i am just getting started with asp .NET MVC 2 applications and i stumbled upon a problem. I'm having trouble updating my tables. The debugger doesn't report any error, it just doesn't do anything... I hope some can help me out. Thank you for your time. This is my controller code... public ActionResult Edit(int id) { var supplierToEdit = (from c in _entities.SupplierSet where c.SupplierId == id select c).FirstOrDefault(); return View(supplierToEdit); } // // POST: /Supplier/Edit/5 [AcceptVerbs(HttpVerbs.Post)] public ActionResult Edit(Supplier supplierToEdit) { if (!ModelState.IsValid) return View(); try { var originalSupplier = (from c in _entities.SupplierSet where c.SupplierId == supplierToEdit.SupplierId select c).FirstOrDefault(); _entities.ApplyPropertyChanges(originalSupplier.EntityKey.EntitySetName, supplierToEdit); _entities.SaveChanges(); // TODO: Add update logic here return RedirectToAction("Index"); } catch { return View(); } } This is my View ... <h2>Edit</h2> <% using (Html.BeginForm()) {%> <%= Html.ValidationSummary(true) %> <fieldset> <legend>Fields</legend> <div class="editor-label"> <%= Html.LabelFor(model => model.CompanyName) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.CompanyName) %> <%= Html.ValidationMessageFor(model => model.CompanyName) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.ContactName) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.ContactName) %> <%= Html.ValidationMessageFor(model => model.ContactName) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.ContactTitle) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.ContactTitle) %> <%= Html.ValidationMessageFor(model => model.ContactTitle) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.Address) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.Address) %> <%= Html.ValidationMessageFor(model => model.Address) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.City) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.City) %> <%= Html.ValidationMessageFor(model => model.City) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.PostalCode) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.PostalCode) %> <%= Html.ValidationMessageFor(model => model.PostalCode) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.Country) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.Country) %> <%= Html.ValidationMessageFor(model => model.Country) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.Telephone) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.Telephone) %> <%= Html.ValidationMessageFor(model => model.Telephone) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.Fax) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.Fax) %> <%= Html.ValidationMessageFor(model => model.Fax) %> </div> <div class="editor-label"> <%= Html.LabelFor(model => model.HomePage) %> </div> <div class="editor-field"> <%= Html.TextBoxFor(model => model.HomePage) %> <%= Html.ValidationMessageFor(model => model.HomePage) %> </div> <p> <input type="submit" value="Save" /> </p> </fieldset> <% } %> <div> <%= Html.ActionLink("Back to List", "Index") %> </div>

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  • Need a mysql query to extract data from mm-forms

    - by Kirill
    http://cl.ly/201a11b430bf60ef9e97 is what the rows look like, after I clean them up a bit: SELECT fk_form_joiner_id,form_key,value FROM wp_contactform_submit_data WHERE form_key!='page_post_id' AND form_key!='captcha-802' AND form_key!='page_post_title' AND form_key!='user_ID' What I need is a query where it would transform this into a structure like: id | First-name | Surname-name | your-email | dob | address-1 | address-2 | county | postcode | phone ------------------------------------------------------------------------------------------------------- 88 | jack | Somethin | [email protected] | dob | (etc) I think I know a way to do this through php, but I think there must be a way to do it as a mysql query. Ultimately, I need to export this (into a csv), but if you could give me a query that would output this into a mysql table (or at least a workable select query, that I could then turn into an insert query loop, to create a table), I'd do it form there. Thank you.

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  • BlackBerry - Programmatically fetching data in calendar

    - by SWATI
    i have invoked blackberry calender from my application can anyone tell me how to fetch : date duration notes from the selected date my code : MenuItem importCalender = new MenuItem("Import from Calender",100,11) { public void run() { UiApplication.getUiApplication().invokeAndWait(new Runnable() { public void run() { try { EventList list = (EventList)PIM.getInstance().openPIMList(PIM.EVENT_LIST, PIM.READ_WRITE); Enumeration events = list.items(); BlackBerryEvent e = (BlackBerryEvent) events.nextElement(); Invoke.invokeApplication(Invoke.APP_TYPE_CALENDAR, new CalendarArguments( CalendarArguments.ARG_VIEW_DEFAULT,e) ); } catch (PIMException e) { //e.printStackTrace(); } } }); } }; protected void makeMenu(Menu menu, int instance) { menu.add(importCalender); }

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  • Restore Oracle XE data from *.DBF

    - by asero
    Is it possible to restore oracle database from *.DBF files? If yes, then how? I really find it hard to deal with backup and restore things in Oracle compared to SQL Server. I have a backup of the whole oraclexe folder including these files.

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  • How to prevent column b containing the same value as any column a in Oracle?

    - by Janek Bogucki
    What is a good way to prevent a table with 2 columns, a and b, from having any record where column b is equal to any value in column a? This would be used for a table of corrections like this, MR -> Mr Prf. -> Prof. MRs -> Mrs I can see how it could be done with a trigger and a subquery assuming no concurrent activity but a more declarative approach would be preferable. This is an example of what should be prevented, Wing Commdr. -> Wing Cdr. Wing Cdr. -> Wing Commander Ideally the solution would work with concurrent inserts and updates.

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  • iphone, get the object count without performing a fetch?

    - by Andrew
    Hi, I seem to recall that it's possible to return the resulting object count from an NSPredicate in CoreData without actually performing a fetch, but I can't find any reference to this. Can someone confirm that I wasn't dreaming (sad dream to have!), and would this be safe to do in another thread? Thanks Andy

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  • What are the reasons to store documents into DBMS when using Alfresco DMS

    - by Julia
    Hello guys! I have interview for an internship with company that wants to implement document management system and they are considering on the first place open source solutions, their top choice being Alfresco, but decision is still not final, part of my work there would be to investigate is Alfresco the best solution. What I have seen from project description, is that they would implement Alfresco with MySQL database, and not to use DBMS just for document metadata and indexing, but they actually want to store documents inside. By company profile, type of documents would be mostly PDF and .doc, not images. I have researched a bit, and I have read all the topics here related to storing files into the database, not to duplicate a question. So from what I understand, storing BLOBS is generally not recomendable, and by the profile of the company and their legal obligations with archiving, I see they will have to store larger amount of docs. I would like to be ready as much as I can for the interview and that is why I would like your opinion on these questions: 1) What will be your reasons for deciding to store documents into the DBMS, (especially having in mind that you are installing Alfresco, which stores files in the FS)??? 2) Do you have any experiences with storing documents into the MySQL database specifically??? All the help is very much appreciated, I am really excited about interview and really want this internship, so this is one of things i really want to understand before!! Thank you!!!!

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  • Efficient algorithm to find first available name

    - by Avrahamshuk
    I have an array containing names of items. I want to give the user the option to create items without specifying their name, so my program will have to supply a unique default name, like "Item 1". The challenge is that the name has to be unique so i have to check all the array for that default name, and if there is an item with the same name i have to change the name to be "Item 2" and so on until i find an available name. The obvious solution will be something like that: String name; for (int i = 0 , name = "Item " + i ; !isAvailable(name) ; i++); My problem with that algorithm is that it runs at O(N^2). I wonder if there is a known (or new) more efficient algorithm to solve this case. In other words my question is this: Is there any algorithm that finds the first greater-than-zero number that dose NOT exist in a given array, and runs at less that N^2? Thanks!

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  • how to store xml data in array (php)

    - by tommy
    <?xml version="1.0" encoding="UTF-8" ?> - <response xmlns:lf="http://api.lemonfree.com/ns/1.0"> <lf:request_type>listing</lf:request_type> <lf:response_code>0</lf:response_code> - <lf:result type="listing" count="10"> - <lf:item id="56832429"> <lf:attr name="title">Used 2005 Ford Mustang V6 Deluxe</lf:attr> <lf:attr name="year">2005</lf:attr> <lf:attr name="make">FORD</lf:attr> <lf:attr name="model">MUSTANG</lf:attr> <lf:attr name="vin">1ZVFT80N555169501</lf:attr> <lf:attr name="price">12987</lf:attr> <lf:attr name="mileage">42242</lf:attr> <lf:attr name="auction">no</lf:attr> <lf:attr name="city">Grand Rapids</lf:attr> <lf:attr name="state">Michigan</lf:attr> <lf:attr name="image">http://www.lemonfree.com/images/stock_images/thumbnails/2005_38_557_80.jpg</lf:attr> <lf:attr name="link">http://www.lemonfree.com/56832429.html</lf:attr> </lf:item> Above is the xml i am working with - there are more items - this is the first set. How can i get these elements in to an array. I have been trying with php's simple xml etc but i just cant do it. Thanks guys

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  • Passing data to a non-static listBox, by calling function from another class

    - by Andrew A
    I have a simple forms program that I have been fighting with for a while now. I simply want to be able to call a method from a different class file (when a certain step is triggered in the code in that class file) in order to insert a string in the listBox. Here is my main method, pretty standard: class Program { [STAThread] static void Main(string[] args) { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new MainForm()); } } Here is the function which resides in my MainForm.cs file, which I can call just fine from that class file (via 'TextToBox(myString);'): public partial class MainForm : Form { ... // Function to output results to main Listbox window public void TextToBox(string aString) { // Place messages in Main Display list box window this.listBox1.Items.Insert(0, aString); } ... } But my problem is when I am in another class and I want to call 'TextToBox(myString);'. If I create another object reference of the MainForm, the code compiles fine but nothing will show up in the listBox. How do I do this? I cannot simply make TextToBox() static. I know I must create the object reference but I can't figure out how to reference the ORIGINAL MainForm, the one that was created in the Main method. Thanks in advance...

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  • Browser show incomplete JSP data

    - by memoryleaks
    I am using JSP, Struts 1.3 and Apache Tomcat 5.5. For some reason response from JSP is being truncated and complete information is not shown. Class generated from the problem JSP page looks just fine. There are no any errors logged in Catalina's logs. I have no idea how this issue can be fixed.

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  • Strategy for Offline/Online data synchronization

    - by Adi
    My requirement is I have server J2EE web application and client J2EE web application. Sometimes client can go offline. When client comes online he should be able to synchronize changes to and fro. Also I should be able to control which rows/tables need to be synchronized based on some filters/rules. Is there any existing Java frameworks for doing it? If I need to implement on my own, what are the different strategies that you can suggest? One solution in my mind is maintaining sql logs and executing same statements at other side during synchronization. Do you see any problems with this strategy?

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  • ASP.NET Dynamically filtering data

    - by Jasper
    For a project I'm working on, we're looking for a way to dynamically add filters to a page which then control the dataoutput in, for instance, a grid. We want to add the filters dynamically because we want the customer to be able to change which properties can be filtered and what filtertype (textbox, dropdown, colourpicker, etc.) should be used. The filter should work as follows: - The customer links a filter to a certain property and specifies the filtertype (for this example: dropdown). - A user control which contains all the filter loads all filters specified - The filters load all values of the specified property as options. The first time the page loads; this would be the values of all items. - Now the user selects a value from one of the filters; the page reloads - Only items which have the specified filter value are retrieved, the user may specify one or more filters at the same time. - Once a user drills down by filtering, only filtervalues of the retrieved items should be used in the other filters. I have the following problems: - When I create the filters runtime, events are lost because the controls get recreated each postback. - I could place the filters in PreInit which should solve this, but then determining which controls should be loaded becomes a problem since loading all environment vars isn't finished yet - I don't know a good way of returning all the filter values to a central point from which I can make a good query. - The query has to be dynamic. I'm using linq which I want to make dynamic so I don't have to select everything everytime. How to make a dynamic select query based on a string stored in the database? - I have to select items based on the filtervalues and then adjust the rest of the filters to the already made selection. That kind of messes up the whole regular databinding sequence. Any help in one of the above would be great! PS: One thing I thought about was passing along filter values in the postback which would have to be recognizable. That way the server could use them for selection and then create the filters and autoselect the previously selected filtervalues. I'm not quite sure how to acheive this though...

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  • Sql Server Maintenance Plan Tasks & Completion

    - by Ben
    Hi All, I have a maintenance plan that looks like this... Client 1 Import Data (Success) -> Process Data (Success) -> Post Process (Completion) -> Next Client Client 2 Import Data (Success) -> Process Data (Success) -> Post Process (Completion) -> Next Client Client N ... Import Data and Process Data are calling jobs and Post Process is an Execute Sql task. If Import Data or Process Data Fail, it goes to the next client Import Data... Both Import Data and Process Data are jobs that contain SSIS packages that are using the built-in SQL logging provider. My expectation with the configuration as it stands is: Client 1 Import Data Runs: Failure - Client 2 Import Data | Success Process Data Process Data Runs: Failure - Client 2 Import Data | Success Post Process Post Process Runs: Completion - Success or Failure - Next Client Import Data This isn't what I'm seeing in my logs though... I see several Client Import Data SSIS log entries, then several Post Process log entries, then back to Client Import Data! Arg!! What am I doing wrong? I didn't think the "success" piece of Client 1 Import Data would kick off until it... well... succeeded aka finished! The logs seem to indicate otherwise though... I really need these tasks to be consecutive not concurrent. Is this possible? Thanks!

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  • Infopath 2007 and WCF Data Connection

    - by Nathan Fisher
    I am having trouble trying to connect an Infopath 2007 form to an WCF web service. I appears that the Infopath only wants to communicate via a SOAP 1.0 message. To get around the issue for the moment I have created an .asmx web service. Should I consider continuing down this workaround or figure out a way to get WCF to dish out SOAP 1.0 1.1 messages?

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  • Entering and retrieving data from SQLite for an android List View

    - by Infiniti Fizz
    Hi all, I started learning android development a few weeks ago and have gone through the developer.android.com tutorials etc. But now I have a problem. I'm trying to create an app which tracks the usage of each installed app. Therefore I'm pulling the names of all installed apps using the PackageManager and then trying to put them into an SQLite database table. I am using the Notepad Tutorial SQLite implementation but I'm running into some problems that I have tried for days to solve. I have 2 classes, the DBHelper class and the actual ListActivity class. For some reason the app force closes when I try and run my fillDatabase() function which gets all the app names from the PackageManager and tries to put them into the database: private void fillDatabase() { PackageManager manager = this.getPackageManager(); List<ApplicationInfo> appList = manager.getInstalledApplications(0); for(int i = 0; i < appList.size(); i++) { mDbHelper.addApp(manager.getApplicationLabel(appList.get(i)).toString(), 0); } } addApp() is a function defined in my AppsDbHelper class and looks as follows: public long createApp(String name, int usage) { ContentValues initialValues = new ContentValues(); initialValues.put(KEY_NAME, name); initialValues.put(KEY_USAGE, usage); return mDb.insert(DATABASE_TABLE, null, initialValues); } The database create is defined as follows: private static final String DATABASE_CREATE = "create table notes (_id integer primary key autoincrement, " + "title text not null, usage integer not null);"; I have commented out all statements that follow fillDatabase(); in the onCreate() method of the ListActivity and so know that it is definetely the problem but I don't know why. I am taking the appName and putting it into the KEY_NAME field of the row and putting 0 into the KEY_USAGE field of the row (because initially, my app will default the usage of each app to 0 (not used yet)). If my addApp() function doesn't take the usage and just puts KEY_NAME into the ContentValues and into the database, it seems to work fine, but I want a column for usage. Any ideas why it is not working? Have I overlooked something? Thanks for your time, InfinitiFizz

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