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• code first CTP5 error message

  - by user482833

  I get the following error message with a new project I have set using code first CTP5. Can't find anything on the web about it. Has anyone encountered this error message? The context cannot be used while the model is being created. This occurs the first time my database context is called (code below): using (StaffData context = new StaffData()) { return context.Employees.Count(e = e.EmployeeReference) == 1; } At this point the database has not been created. I have a database initialiser DropCreateDatabaseIfModelChanges which I set in app_start.

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• Tokenizing Twitter Posts in Lucene

  - by Amaç Herdagdelen

  Hello, My question in a nutshell: Does anyone know of a TwitterAnalyzer or TwitterTokenizer for Lucene? More detailed version: I want to index a number of tweets in Lucene and keep the terms like @user or #hashtag intact. StandardTokenizer does not work because it discards the punctuation (but it does other useful stuff like keeping domain names, email addresses or recognizing acronyms). How can I have an analyzer which does everything StandardTokenizer does but does not touch terms like @user and #hashtag? My current solution is to preprocess the tweet text before feeding it into the analyzer and replace the characters by other alphanumeric strings. For example, String newText = newText.replaceAll("#", "hashtag"); newText = newText.replaceAll("@", "addresstag"); Unfortunately this method breaks legitimate email addresses but I can live with that. Does that approach make sense? Thanks in advance! Amaç

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• Windows Network Programming

  - by bdhar

  I am planning to get some good book for Windows Socket Programming in VC++. I have 2+ years of experience in working with VC++/ATL/COM/MFC; but not in the networking domain. I have been doing some search in Google for "Windows network programming" books. There are few but they have both good and bad comments scattered all over; and I am not able to decide anything. Please recommend some good book with Pros and Cons. The books I found are below. Windows Sockets Network programming Network Programming for Microsoft Windows Thanks.

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• Can't set up image upload in Django

  - by culebrón

  I can't understand what's not working here: 1) settings MEDIA_ROOT = '/var/www/satel/media' MEDIA_URL = 'http://media.satel.culebron' ADMIN_MEDIA_PREFIX = '/media/' 2) models class Photo(models.Model): id = models.AutoField(primary_key=True) name = models.CharField(max_length = 200) desc = models.TextField(max_length = 1000) img = models.ImageField(upload_to = 'upload') 3) access rights: drwxr-xrwx 3 culebron culebron 4.0K 2010-04-14 21:13 media drwxr-xrwx 2 culebron culebron 4.0K 2010-04-14 19:04 upload 4) SQL: CREATE TABLE "photos_photo" ( "id" integer NOT NULL PRIMARY KEY, "name" varchar(200) NOT NULL, "desc" text NOT NULL, "img" varchar(100) NOT NULL ); 4) run Django test server as myself. 5) result: SuspiciousOperation at /admin/photos/author/add/ Attempted access to '/var/www/satel/upload/OpenStreetMap.png' denied. Not a PIL & jpeg issue, seems not to be access rights issue. But what's wrong?

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• Some basic questions about Django, Pyjamas and Clean URLs

  - by Acidburn2k

  I am farily new to the topic, but I am trying to combine both Django and Pyjamas. What would be the smart way to combine the two? I am not asking about communication, but rather about the logical part. Should I just put all the Pyjamas generated JS in the base of the domain, say http://www.mysite.com/something and setup Django on a subdirectory, or even subdomain, so all the JSON calls will go for http://something.mysite.com/something ? As far as I understand now in such combination theres not much point to create views in Django? Is there some solution for clean urls in Pyjamas, or that should be solved on some oy,ther level? How? Is it a standard way to pass some arguments as GET parameteres in a clean url while calling a Pyjamas generated JS?

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• How to style alternating rows in asp.net mvc

  - by YeahStu

  I am using a <% foreach ...% loop to list a collection of items on my website. I want to add a different background color for the style of alternating rows in my list. I have found a way to do this but I am not satisfied with it as it seems like a hack. Here is what I have done to solve it so far: <table> <% int counter = 0; foreach (var item in Model) { counter++; if (counter % 2 == 0) { %> <tr class="colorfull"> <% } else { %> <tr> <% } %> ... Is there a best practice that I am missing that people are using for this scenario in ASP.NET MVC?

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• Basic Ruby on Rails Question about routing

  - by Acidburn2k

  I have a controller without any related model. This controller is to span some informations from various models. I have lots of actions there, which define certain views on the page. What would be the best way to organize routes for this controller. What I would like is to have /dashboard/something point to any action in the dashboard controller. Not actions like new/edit but arbitrary (showstats, etc). With trail and error I made something like this: map.dashboard 'dashboard/:action', :controller => 'dashboard', :action => :action Now it is possible to access those url using helper: dashboard_url('actionname') This approch seems to be working ok, but is this the way to go? I am not quite sure understand, how are the helper method names generated. How to generate same helper names as in basic controllers "action_controller_url" ? That would be more generic and made the code more consistent. Thanks in advance.

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• RIA Services Localization, where to place Resource Files

  - by kmacmahon

  I have the following Solution: SomeProject.Ria (non Silverlight code) SomeProject.Ria.Silverlight (Silverlight light code, namespace is still SomeProject.Ria) SomeProject.Ria.MyServices (RIA Services Domain Service) SomeProject.Ria.MyServices.Proxies (RIA Services Silverlight Generated Code) SomeProject.Shell (Silverlight Applicaiton) SomeProject.Web (Web Application) I would like to use Resource Files for my Annotations on the meta data class in SomeProject.Ria.MyServices. The format for that appears to be: [Required(AllowEmptyStrings=false,ErrorMessageResourceName="ThisFieldIsRequired", ErrorMessageResourceType(MyResource))] Which project does MyResource belong in? (Assuming that someday I need to support other culture files). Also the use of the string in here really seems to breed room for error, is it possible to do something like this and still achieve localization, or does this just get compiled into the meta data? If not, how can I get round the resource name being a string? [Required(AllowEmptyStrings=false,ErrorMessage=MyResources.RequiredMessage)]

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• has_many :through on self?

  - by Glex

  I have a User model. A user can be either a dj, a club, or a clubber (this is controlled by the User#account_type attribute). A club can have many djs, and a dj can have many users: enumerated_attribute :account_type, %w(^clubber dj club), :nil => false do label :clubber => "Clubber" label :dj => "DJ" label :club => "Club" end has_many :dj_club_relationships, :class_name => "User", :dependent => :destroy has_many :dj_user_relationships, :dependent => :destroy has_many :djs, :through => :dj_club_relationships, :class_name => "User" has_many :users, :through => :dj_user_relationships However, this doesn't work as well as expected, since Rails doesn't know, for example, that it needs to destroy all dj_club_relationships with club_id when the user being destroyed is a club, and with dj_id when the user is a dj. How can I help rails know about it?

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• Any working tutorials for Authlogic?

  - by Mark Wilbur

  I've been trying to build my first rails app and have gotten stuck on the issue of user authentication. I've found a number of tutorials for using various plug-ins to do this, but so far every single one of them is out-dated, and as a result, broken! From what I've read, I think Authlogic may be the best fit for me, and I've tried two things: 1) Going through Railscast, episode #160 (which is a tutorial for setting it up) 2) Using Ryan B's nifty_authentication gem with the --authlogic tag In both cases, I get the following error as soon as I try to do anything with a user: undefined local variable or method `acts_as_authentic' for # I believe this is from the User model: class User < ActiveRecord::Base acts_as_authentic end I'm sure I've installed the authlogic gem, and I've added config.gem "authlogic" to my environment.rb Any ideas about what's wrong? Anybody know of a complete and up to date tutorial for adding user authentication?

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• Jabber integration into site and multiple domains

  - by Jamie

  Hi all, I'm creating a centralised web product, i.e. a customer gets assigned a personal domain, for example company1.example.com or company2.example.com and can then use our service. I'm planning to integrate a jabber service into the website. I have already found a decent jabber client library which I can use for the site. I know that jabberd2 uses mysql, which is perfect because I want to use the web interface to add users, delete users, view message logs etc. However, my problem is when I have two companies or more. I would like a jabber server which can host multiple domains, i.e. jabber.company1.example.com, jabber.company2.example.com Do you have any experience of this? And do you know of a good jabber server which will do this? Any help would be hugely appreciated!

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• Listen for keypress while iframe has focus?

  - by Matrym

  Is there any way to listen for keypress events in a parent page while the iframe has focus? Or, alternatively, is it possible to pull away the focus from the iframe? Please note, the iframe is not within the same domain, so I cannot modify it's contents via javascript. I've tried the following jquery in the parent page, thinking perhaps an intermittent blur would work, but it doesn't seem to. function iframeBlur(){ $("#iframe").blur(); } var blurif = setInterval(iframeBlur, 500); Thanks for your time!

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• Automapper: Ignore on condition of

  - by Kieranmaine

  Is it possible to ignore mapping a member depending on the value of a source property? For example if we have: public class Car { public int Id { get; set; } public string Code { get; set; } } public class CarViewModel { public int Id { get; set; } public string Code { get; set; } } I'm looking for something like Mapper.CreateMap<CarViewModel, Car>() .ForMember(dest => dest.Code, opt => opt.Ignore().If(source => source.Id == 0)) So far the only solution I have is too use two different view model and create different mappings for each one.

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• EF 4.0 - Many to Many relationship - problem with deletes

  - by chugh97

  My Entity Model is as follows: Person , Store and PersonStores Many-to-many child table to store PeronId,StoreId When I get a person as in the code below, and try to delete all the StoreLocations, it deletes them from PersonStores as mentioned but also deletes it from the Store Table which is undesirable. Also if I have another person who has the same store Id, then it fails saying "The DELETE statement conflicted with the REFERENCE constraint \"FK_PersonStores_StoreLocations\". The conflict occurred in database \"EFMapping2\", table \"dbo.PersonStores\", column 'StoreId'.\r\nThe statement has been terminated" as it was trying to delete the StoreId but that StoreId was used for another PeronId and hence exception thrown. Person p = null; using (ClassLibrary1.Entities context = new ClassLibrary1.Entities()) { p = context.People.Where(x=> x.PersonId == 11).FirstOrDefault(); List<StoreLocation> locations = p.StoreLocations.ToList(); foreach (var item in locations) { context.Attach(item); context.DeleteObject(item); context.SaveChanges(); } }

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• Use super with before_validation.

  - by krunal shah

  I have this code in my every model. Class people def before_validation @attributes.each do |key,value| self[key] = nil if value.blank? end end end Now i want to put my loop in separate module. Like Module test def before_validation @attributes.each do |key,value| self[key] = nil if value.blank? end end end And i want to call this before_validation this way Class people include test def before_validation super .....Here is my other logic part..... end end Are there any way to do it like that in rails??

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• How do I free SQLServerCE's COM instance from the current running process?

  - by David Thornley

  It's been a while since I touched COM so be nice ;) This is under WindowsCE 5.0 with SQLServerCE 2.0. After calling this to load SQLServerCE 2.0 : - IDBInitialize *pIDBInitialize = NULL; CoCreateInstance(CLSID_SQLSERVERCE_2_0, NULL, CLSCTX_INPROC_SERVER, IID_IDBInitialize, (void**)&pIDBInitialize); Module load occurs for SSCE20.dll which obviously loads the SQLServerCE engine into the process space. What I don't understand is if I do this immediately after :- pIDBInitialize->Release(); I don't see a dll module unload, so that SSCE20.dll (and friends) are still loaded into my process. Now I tried CoFreeUnusedLibraries() which I figure forces COM to purge any unused libraries, but it doesn't seem to do the trick. At runtime I want to be able to completely unload the SQLServerCE 2.0 dll from the process to streamline an upgrade to 3.5SP1. I suspect this has something to do with the shared dll model that Microsoft use under WindowsCE... but, I might be wrong :) Thanks in advance, David.

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• Scrapy spider is not working

  - by Zeynel

  Since nothing so far is working I started a new project with python scrapy-ctl.py startproject Nu I followed the tutorial exactly, and created the folders, and a new spider from scrapy.contrib.spiders import CrawlSpider, Rule from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor from scrapy.selector import HtmlXPathSelector from scrapy.item import Item from Nu.items import NuItem from urls import u class NuSpider(CrawlSpider): domain_name = "wcase" start_urls = ['http://www.whitecase.com/aabbas/'] names = hxs.select('//td[@class="altRow"][1]/a/@href').re('/.a\w+') u = names.pop() rules = (Rule(SgmlLinkExtractor(allow=(u, )), callback='parse_item'),) def parse(self, response): self.log('Hi, this is an item page! %s' % response.url) hxs = HtmlXPathSelector(response) item = Item() item['school'] = hxs.select('//td[@class="mainColumnTDa"]').re('(?<=(JD,\s))(.*?)(\d+)') return item SPIDER = NuSpider() and when I run C:\Python26\Scripts\Nu>python scrapy-ctl.py crawl wcase I get [Nu] ERROR: Could not find spider for domain: wcase The other spiders at least are recognized by Scrapy, this one is not. What am I doing wrong? Thanks for your help!

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• Append XML string block WITH NAMESPACE REF to existing XmlDocument in .NET

  - by FT

  I have an xml document (XmlDocument) which looks like this... <stuff xmlns:n="hhtp://tempuri.com/"> </stuff> ... and a "fragment" (string) which looks like this <things> <thing n:type="info"> </thing> </things> I want to "inject" the fragment into the main document. How? (HINT: You can't use XmlDocumentFragment because the namespace 'n' isn't declared in the fragment, and the object model complains about this - throwing an 'unknown namespace' error even though the resultant document will be perfectly valid.)

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• [Django] Automatically Update Field when a Different Field is Changed

  - by Gordon

  I have a model with a bunch of different fields like first_name, last_name, etc. I also have fields first_name_ud, last_name_ud, etc. that correspond to the last updated date for the related fields (i.e. when first_name is modified, then first_name_ud is set to the current date). Is there a way to make this happen automatically or do I need to check what fields have changed each time I save an object and then update the related "_ud" fields. Thanks a lot!

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• Entity Framework, full-text search and temporary tables

  - by markus

  I have a LINQ-2-Entity query builder, nesting different kinds of Where clauses depending on a fairly complex search form. Works great so far. Now I need to use a SQL Server fulltext search index in some of my queries. Is there any chance to add the search term directly to the LINQ query, and have the score available as a selectable property? If not, I could write a stored procedure to load a list of all row IDs matching the full-text search criteria, and then use a LINQ-2-Entity query to load the detail data and evaluate other optional filter criteria in a loop per row. That would be of course a very bad idea performance-wise. Another option would be to use a stored procedure to insert all row IDs matching the full-text search into a temporary table, and then let the LINQ query join the temporary table. Question is: how to join a temporary table in a LINQ query, as it cannot be part of the entity model?

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• django forms doubt

  - by webvulture

  Here, I am a bit confused with forms in Django. I have information for the form(a poll i.e the poll question and options) coming from some db_table - table1 or say class1 in models. Now the vote from this poll is to be captured which is another model say class2. So, I am just getting confused with the whole flow of forms, here i think. How will the data be captured into the class2 table? I was trying something like this. def blah1()     get_data_from_db_table_1()     x = blah2Form()     render_to_response(blah.html,{...})

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• Java type for date/time when using Oracle Date with Hibernate

  - by Marcus

  We have a Oracle Date column. At first in our Java/Hibernate class we were using java.sql.Date. This worked but it didn't seem to store any time information in the database when we save so I changed the Java data type to Timestamp. Now we get this error: springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.dao.an notation.PersistenceExceptionTranslationPostProcessor#0' defined in class path resource [margin-service-domain -config.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreatio nException: Error creating bean with name 'sessionFactory' defined in class path resource [m-service-doma in-config.xml]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Wrong column type: CREATE_TS, expected: timestamp Any ideas on how to map an Oracle Date while retaining the time portion? Update: I can get it to work if I use the Oracle Timestamp data type but I don't want that level of precision ideally. Just want the basic Oracle Date.

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• MVVM in a canvas with usercontrols

  - by Mauro Destro

  I have a MVVM WPF application that basically wants to be a single line diagram designer for an electrical distribution network. I have a canvas that must contains transformers, circuit breaker, lines and cables. My big problem is the design... How can i start? I think about a DesignerView, DesignerViewModel that contains an ObservableCollection of IDesignerItemViewModel that is my base class for all the element. But in this case I have to use ItemsControl to bind the content of the canvas to my collection but the pros is that I don't have to create usercontrol for each element but i'll solve most of the problems with DataTemplate (i suppose). Each element viewmodel mantain a link to a model persisted in a repository where i mantain my logical tree. Any hint about how to proceed, I have looked at many DiagramCanvas example but all of those use simple items most like simple rectangle...

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• Odd Drag and drop sorting error Rails for nested attributes

  - by Senthil

  I've got this weird bug when trying to use drag and drag for two models (one nested within another). I've a category model which has many apps. In my category index page, I tried use "content_tag_for" to sort categories and apps within each category. But for some odd reason only the first element has drag, drop enabled. I can drag and drop categories all I want, but I can't drag the app in the second category, just the first category. Copy and paste gets ridiculously hopeless with HAML, so here's a Pastie instead. I made a sample app on heroku for you to check out here. Drag and drag work for both category and app, so I'm guessing it has to do something with the ul or li. Any help is appreciated. Thanks.

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• Custom broadcast events in AS3?

  - by Ender

  In Actionscript 3, most events use the capture/target/bubble model, which is pretty popular nowadays: When an event occurs, it moves through the three phases of the event flow: the capture phase, which flows from the top of the display list hierarchy to the node just before the target node; the target phase, which comprises the target node; and the bubbling phase, which flows from the node subsequent to the target node back up the display list hierarchy. However, some events, such as the Sprite class's enterFrame event, do not capture OR bubble - you must subscribe directly to the target to detect the event. The documentation refers to these as "broadcast events." I assume this is for performance reasons, since these events will be triggered constantly for each sprite on stage and you don't want to have to deal with all that superfluous event propagation. I want to dispatch my own broadcast events. I know you can prevent an event from bubbling (Event.bubbles = false), but can you get rid of capture as well?

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