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• Changing ActiveRecord attribute value in before_save hook

  - by fifigyuri

  I needed to fix the encoding of an ActiveRecord attribute and decided to do it in a before_save hook. And at this point I noticed an unexpected feature. When I wanted to change the value of the attribute, simple using the attribute_name=XY did not work as I expected. Instead of that I needed to use self[:attribute_name]=XY. So far did not recognise this behaviour and I used AR.attribute_name=XY. What is the reason for this? Does this behaviour relate to the hook or something else? Thanks for explanation.

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• DataContractSerializer KnownType attribute not being respected?

  - by e28Makaveli

  I have a class that is decorated with a KnownType attribute with a type of the class. Is this not allowed? [KnownType(typeof(Occ600UIConfig))] public class Occ600UIConfig { } If so, why is the DCS throwing the following exception? {"Error in line 1 position 387. Element 'http://schemas.microsoft.com/2003/10/Serialization/Arrays:Value' contains data of the 'http://schemas.datacontract.org/2004/07/OCC600.Infrastructure.Dictionary.BusinessEntities:Occ600UIConfig' data contract. The deserializer has no knowledge of any type that maps to this contract. Add the type corresponding to 'Occ600UIConfig' to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding it to the list of known types passed to DataContractSerializer."}

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• Checking attribute exists in JSP

  - by Javi

  Hello, I have some classes which extends a superclass, and in the JSP I want to show some attributes of these classes. I only want to make one JSP, but I don't know in advance if the object has an attribute or not. So I need a JSTL expression or a tag which checks that the object I pass has this attribute (similar to in operator in javascript, but in the server). <c:if test="${an expression which checks if myAttribute exists in myObject}"> <!-- Display this only when myObject has the atttribute "myAttribute" --> <!-- Now I can access safely to "myAttribute" --> ${myObject.myAttribute} </C:if> How can I get this? Thanks.

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• Html helper to show display name attribute without label

  - by Pedre

  I have this: [Display(Name = "Empresa")] public string Company{ get; set; } In my aspx I have: <th><%: Html.LabelFor(model => model.Company)%></th> And this generates: <th><label for="Company">Empresa</label></th> Are there any html helper extensions to only show the display attribute without label, only plain text? My desired output is this: <th>Empresa</th> Thanks! EDIT I tried DisplayFor or DisplayTextFor as suggested, but they are not valid because they generate: <th>Amazon</th> They return the value of the property... I want the name from the Display attribute.

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• struts.xml extends attribute

  - by usman

  Hi, can you please tell me how we can extend more then one package in the tag extends attribute in the strtus.xml using struts 2 Usman.sk

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• ASP.NET MVC Response Filter + OutputCache Attribute

  - by Shane Andrade

  I'm not sure if this is an ASP.NET MVC specific thing or ASP.NET in general but here's what's happening. I have an action filter that removes whitespace by the use of a response filter: public class StripWhitespaceAttribute : ActionFilterAttribute { public StripWhitespaceAttribute () { } public override void OnResultExecuted(ResultExecutedContext filterContext) { base.OnResultExecuted(filterContext); filterContext.HttpContext.Response.Filter = new WhitespaceFilter(filterContext.HttpContext.Response.Filter); } } When used in conjunction with the OutputCache attribute, my calls to Response.WriteSubstitution for "donut hole caching" do not work. The first and second time the page loads the callback passed to WriteSubstitution get called, after that they are not called anymore until the output cache expires. I've noticed this with not just this particular filter but any filter used on Response.Filter... am I missing something? I also forgot to mention I've tried this without the use of an MVC action filter attribute by attaching to the PostReleaseRequestState event in the global.asax and setting the Response.Filter value there... but still no luck.

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• Remove filter attribute after jQuery UI dialog is finished opening

  - by womp

  Using jQuery UI 1.8rc3 combined with the new jquery.effects.fade.js code, I've been able to finally apply fade-in and fade-out effects to opening the UI Dialog widgets. Hooray! $dialog.dialog({ show: { effect: "fade", options: {}, speed: 150 } } This works great - unfortunately, there's the known IE7 & 8 bug where the ClearType gets turned off by the application of an empty filter: style attribute after the fade effect is finished. I have the code to remove the filter attribute, I just can't find a good way to hook it into the event chain. The dialog's "open" and "focus" events are too soon. I need something like a "dialog opening animation is finished" callback. How can I hook up a callback to the end of the opening effect for a dialog?

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• Design question for WinForms (C#) app, using Entity Framework

  - by cdotlister

  I am planning on writing a small home budget application for myself, as a learning excercise. I have built my database (SQL Server), and written a small console application to interact with it, and test out scenarios on my database. Once I am happy, my next step would be to start building the application - but I am already wondering what the best/standard design would be. I am palnning on using Entity Framework for handling my database entities... then linq to sql/objects for getting the data, all running under a WinForms (for now) application. My plan (I've never used EF... and most of my development background is Web apps) is to have my database... with Entity Framework in it's own project.. which has the connection to the database. This project would expose methods such as 'GetAccount()', 'GetAccount(int accountId)' etc. I'd then have a service project that references my EF project. And on top of that, my GUI project, which makes the calls to my service project. But I am stuck. Lets say I have a screen that displays a list of Account types (Debit, Credit, Loan...). Once I have selected one, the next drop down shows a list of accounts I have that suite that account type. So, my OnChange event on my DropDown on the account type control will make a call to the serviceLayer project, 'GetAccountTypes()', and I would expect back a List< of Account Types. However, the AccountType object ... what is that? That can't be the AccountType object from my EF project, as my GUI project doesn't have reference to it. Would I have to have some sort of Shared Library, shared between my GUI and my Service project, with a custom built AccountType object? The GUI can then expect back a list of these. So my service layer would have a method: public List<AccountType> GetAccountTypes() That would then make a call to a custom method in my EF project, which would probably be the same as the above method, except, it returns an list of EF.Data.AccountType (The Entity Framework generated Account Type object). The method would then have the linq code to get the data as I want it. Then my service layer will get that object, and transform it unto my custom AccountType object, and return it to the GUI. Does that sound at all like a good plan?

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• ASP.NET MVC & Detached Entity won't save

  - by Justin

  Hey all, I have an ASP.NET MVC POST action for saving an entity on submit of a form. It works fine for insert but doesn't work for update, the database doesn't get called, so it's clearly not tracking the changes, as it's "detached". I'm using Entity Framework w/.NET 4: //POST: /Developers/Save/ [AcceptVerbs(HttpVerbs.Post)] public ActionResult Save(Developer developer) { developer.UpdateDate = DateTime.Now; if (developer.DeveloperID == 0) {//inserting new developer. DataContext.DeveloperData.Insert(developer); } //save changes - TODO: doesn't update... DataContext.SaveChanges(); //redirect to developer list. return RedirectToAction("Index"); } Any ideas would be greatly appreciated, thanks, Justin

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• mingw spitting countless warnings about ignoring "dll import" attribute

  - by hasen j

  I'm using mingw32-make to compile a qt project that uses opengl, it compiles correctly and everything, but it spits countless warning messages of the form: c:/qt3/include/qcolor.h:67: warning: inline function `int qGray(int, int, int)' declared as dllimport: attribute ignored For this particular instance, the function declaration is: Q_EXPORT inline int qGray( int r, int g, int b )// convert R,G,B to gray 0..255 { return (r*11+g*16+b*5)/32; } My question is, why is it spitting all these warning? how can I silence them without silencing other legitimate warnings (i.e. warnings that are related directly to my code and could be potential problems)? More importantly, why is mingw ignoring the dll import attribute in the first place?

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• Sorting NSSets of a core data entity - Objective-c

  - by ncohen

  Hi everyone, I would like to sort the data of a core data NSSet (I know we can do it only with arrays but let me explain...). I have an entity user who has a relationship to-many with the entity recipe. A recipe has the attributes name and id. I would like to get the data such that: Code: NSArray *id = [[user.recipes valueForKey:@"identity"] allObjects]; NSArray *name = [[user.recipes valueForKey:@"name"] allObjects]; if I take the object at index 1 in both arrays, they correspond to the same recipe... Thanks

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• innerHTML removes attribute quotes in Internet Explorer

  - by Augustus

  When you get the innerHTML of a DOM node in IE, if there are no spaces in an attribute value, IE will remove the quotes around it, as demonstrated below: <html> <head> <title></title> </head> <body> <div id="div1"><div id="div2"></div></div> <script type="text/javascript"> alert(document.getElementById("div1").innerHTML); </script> </body> </html> In IE, the alert will read: <DIV id=div2></DIV> This is a problem, because I am passing this on to a processor that requires valid XHTML, and all attribute values must be quoted. Does anyone know of an easy way to work around this behavior in IE?

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• Inherit a parent class docstring as __doc__ attribute

  - by Reinout van Rees

  There is a question about Inherit docstrings in Python class inheritance, but the answers there deal with method docstrings. My question is how to inherit a docstring of a parent class as the __doc__ attribute. The usecase is that Django rest framework generates nice documentation in the html version of your API based on your view classes' docstrings. But when inheriting a base class (with a docstring) in a class without a docstring, the API doesn't show the docstring. It might very well be that sphinx and other tools do the right thing and handle the docstring inheritance for me, but django rest framework looks at the (empty) .__doc__ attribute. class ParentWithDocstring(object): """Parent docstring""" pass class SubClassWithoutDoctring(ParentWithDocstring): pass parent = ParentWithDocstring() print parent.__doc__ # Prints "Parent docstring". subclass = SubClassWithoutDoctring() print subclass.__doc__ # Prints "None" I've tried something like super(SubClassWithoutDocstring, self).__doc__, but that also only got me a None.

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• UrlHelper and ViewContext inside an Authorization Attribute

  - by DM

  I have a scenario that I haven't been able to solve: I'm toying around with creating my own custom authorization attribute for mvc. The main bit of functionality I would like to add is to have the ability to change where the user gets redirected if they are not in a certain role. I don't mind that the system sends them back to the login page if they're not authenticated, but I would like to choose where to send them if they are authenticated but not allowed to access that action method. Here's is what I would like to do: public class CustomAuthorizeAttribute : AuthorizeAttribute { public string Action; public string Controller; protected override bool AuthorizeCore(System.Web.HttpContextBase httpContext) { // if User is authenticated but not in the correct role string url = Url.Action(this.Action, this.Controller); httpContext.Response.Redirect(url); } } And as an added bonus I would like to have access to ViewContext and TempData before I do the redirect. Any thoughts on how I could get instantiate a UrlHelper and ViewContext in the attribute?

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• Setting JMX attribute on VM as command line paramater

  - by 117440226733149663383

  I've done some searching, but can't seem to find a way to do this. We'd like to proactively monitor our permgen space via JMX. It seems the best way to do this is through the UsageThreshold attribute on the "PS Perm Gen" MemoryPool. By default, this is set to 0. Is there a way to specify this, or any JMX attribute, as a -D parameter to VM so this can be set automatically at startup? Or is there another mechanism to load JMX attributes automatically? Thanks.

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• Core Data and many Entity

  - by mr.octobor

  I'm newbie and I must save "Ranking" and "Level" of user. I create file Ranking.xcdatamodel for save "Ranking" with entity name Ranking (property is Rank, Name) I can save and show it. but when I create entity Level (property is CurrentLevel) my program is crash and show this message Unresolved error Error Domain=NSCocoaErrorDomain Code=134100 UserInfo=0x60044b0 "Operation could not be completed. (Cocoa error 134100.)", { metadata = { NSPersistenceFrameworkVersion = 248; NSStoreModelVersionHashes = { Users = ; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers = ( ); NSStoreType = SQLite; NSStoreUUID = "41225AD0-B508-4AA7-A5E2-15D6990FF5E7"; "_NSAutoVacuumLevel" = 2; }; reason = "The model used to open the store is incompatible with the one used to create the store"; } I don't know how to save "Level" please suggest me.

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• ADO.NET Entity Framework

  - by ognjenb

  In wich cases ADO.NET Entity Framework does not give good results when we build asp.net mvc aplication

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• GAE Entity Groups/Transaction

  - by bach

  Hi, Say you have a Client Buying Card object and a product object. When the client chooses the buy opition you create the object and then add a product. It should be transactional but it's not on the same entity group as the product and the card already been persisted, isn't it? Is there any way to overcome this simple scenario safely and easily? here's a code sample: Transaction tx = pm.currentTransaction(); tx.begin(); Product prod = pm.getObjectById(Product.class, "TV"); prod.setReserved(true); pm.makePersistent(prod); Card card = pm.getObjectById(Card.class, "user123"); /// <--- will thorw an exception as card and prod aren't on the same entity group card.setProd(prod); pm.makePersistent(card); try { tx.commit(); break; }

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• Attribute class not calling constructor

  - by Coppermill

  I have created an Attribute, call MyAttribute, which is performing some security and for some reason the Constructor is not being fired, any reason why? public class Driver { // Entry point of the program public static void Main(string[] Args) { Console.WriteLine(SayHello1("Hello to Me 1")); Console.WriteLine(SayHello2("Hello to Me 2")); Console.ReadLine(); } [MyAttribute("hello")] public static string SayHello1(string str) { return str; } [MyAttribute("Wrong Key, should fail")] public static string SayHello2(string str) { return str; } } [AttributeUsage(AttributeTargets.Method)] public class MyAttribute : Attribute { public MyAttribute(string VRegKey) { if (VRegKey == "hello") { Console.WriteLine("Aha! You're Registered"); } else { throw new Exception("Oho! You're not Registered"); }; } }

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• Dynamicly Inject img alt attribute jQuery

  - by Brock

  I need some help, and before we get going, I know it is probably not best practice, but I am doing some maintenance to an existing site and need to accomplish the following for a fix. <a rel="lightbox" href="site.com" title="a generated title"><img src="site.com/img" class="post-image" alt="a long description"/></a> Okay, so I am trying to figure out how to use jQuery or any other method to take the "alt" attribute from my image, and dynamically overwrite the "title" attribute of my "a" tag. Any help would be awesome, I am kinda lost at this juncture.

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• Spring bean's DESTROY-METHOD attribute [does not work for me]

  - by EugeneP

  Can get work the attribute "destroy-method". First, even if I type non-existing method name into "destroy-method" attribute, Spring initialization completes fine (already strange!). Next, when a bean has a "prototype" scope, then I suppose it must be destroyed before the application is closed. That not happens, it is simply never called in my case. Though, after extracting this bean I can call this method explicitly and it does its job. Could you explain why this method is never called in my Spring 2.5 case? p.s. The method exists, it is public and has no arguments.

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• html tag attribute displayed in unicode

  - by user297975

  I have the following code, from which you can see that, I use the same way to create the text in utf-8. The text shown between html tags are shown corrently. But the text shown as html tag attribute are shown in unicode. I'm positive that on the server side(PHP), both texts are treated in the same way and are encoded in utf-8. Why the text as html tag attribute shown in unicode? ?????????????????????? ??

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• Doctrine2 use of criteria inside the entity class

  - by Piotr Kowalczuk

  They try to write a method whose task would be to return only selected elements of the collection of items associated with a particular entity. /** * @ORM\OneToMany(targetEntity="PlayerStats", mappedBy="summoner") * @ORM\OrderBy({"player_stat_summary_type" = "ASC"}) */ protected $player_stats; public function getPlayerStatsBySummaryType($summary_type) { if ($this->player_stats->count() != 0) { $criteria = Criteria::create() ->where(Criteria::expr()->eq("player_stat_summary_type", $summary_type)); return $this->player_stats->matching($criteria)->first(); } return null; } but i get error: PHP Fatal error: Cannot access protected property Ranking\CoreBundle\Entity\PlayerStats::$player_stat_summary_type in /Users/piotrkowalczuk/Sites/lolranking/vendor/doctrine/common/lib/Doctrine/Common/Collections/Expr/ClosureExpressionVisitor.php on line 53 any idea how to fix this?

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• org.hibernate.annotations.Entity not being picked up by Hibernate 3.6

  - by user1317764

  I am using hibernate 3.6.7 I am using annotated classes. My classes were annotated with org.hibernate.annotations.Entity. Added the classes to configuration using configuration.addAnnotatedClass() method. Hibernate does not seem to pick it up. Stuff works fine if I use the standard jpa Entity annotation. What am I missing? I know that the classes have been deprecated in the Hibernate 4.x releases with the advent of newer annotations to configure stuff like dynamic-insert and dynamic-updates. I am not using any XML configuration file. I am setting up configuration with a properties file and using java apis.

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• Difference between entity data model and linq to SQL

  - by Xulfee

  Difference between entity data model and linq to SQL. and which one is preferable

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