DevForce Community Forum : Non-nullable makes empty string invalid? http://www.ideablade.com/forum/ This is an XML content feed of; DevForce Community Forum : DevForce 2010 : Non-nullable makes empty string invalid? Wed, 13 May 2026 07:14:16 -700 Tue, 17 Apr 2012 14:14:06 -700 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 9.69 360 www.ideablade.com/forum/RSS_post_feed.asp?TID=3369 DevForce Community Forum http://www.ideablade.com/forum/forum_images/IdeaBlade_logo_tm.png http://www.ideablade.com/forum/ Non-nullable makes empty string invalid? : Hi Alexander,Even if this is a... http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13329#13329 Author: sbelini
Subject: 3369
Posted: 17-Apr-2012 at 2:14pm

Hi Alexander,
 
Even if this is a console application (i.e. 2-tier app) you still have the concept of client and server.
 
When you set:
 
myEntityManager.VerifierEngine.DefaultVerifierOptions.ShouldTreatEmptyStringAsNull = false;
 
in your console app, it's as if you were changing the VerifierEngine options in the client.
 
You'd still need to change this setting in the server. You would be able to do that via SaveInterceptor:
 
  class SaveInterceptor : EntityServerSaveInterceptor {
      protected override bool ValidateSave() {
      EntityManager.VerifierEngine.DefaultVerifierOptions.ShouldTreatEmptyStringAsNull = false;
      return base.ValidateSave();
    }
  }
 
Regards,Silvio.
]]> Tue, 17 Apr 2012 14:14:06 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13329#13329 Non-nullable makes empty string invalid? : This is on the server. Or, rather,... http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13321#13321 Author: alexander
Subject: 3369
Posted: 17-Apr-2012 at 5:27am

This is on the server. Or, rather, it's in a Console Application. There's no client/server relationship here, I'm working directly against the project with the edmx file and the IB.Designer.cs file in it.]]> Tue, 17 Apr 2012 05:27:13 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13321#13321 Non-nullable makes empty string invalid? : Have you changed it in the... http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13302#13302 Author: sbelini
Subject: 3369
Posted: 13-Apr-2012 at 11:04am

Have you changed it in the server as well?]]> Fri, 13 Apr 2012 11:04:12 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13302#13302 Non-nullable makes empty string invalid? : I tried doing that, but I still... http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13298#13298 Author: alexander
Subject: 3369
Posted: 13-Apr-2012 at 3:49am

I tried doing that, but I still get the same exception. I don't think I'm setting the DefaultVerifierOptions too late either, it's the first thing I do after instantiating my EntityManager.

I noticed upon catching the exception that the DefaultVerifierOptions.ShouldTreatEmptyStringAsNull setting was false, but that a Non-Public member of the VerifierEngine has a field "_verifierOptions" where the setting was true. I assumed those are the settings being used, not the DefaultVerifierOptions.

This behavior can be verified by creating an instance of the entity manager and setting the DefaultVerifierOptions.ShouldTreatEmptyStringAsNull setting to false, and then breaking and looking at the following value in the Watch window: ((IdeaBlade.EntityModel.EntityManager)(entityManager)).VerifierEngine._verifierOptions.

However, even correcting that value didn't fix my problem. I tried changing it through the Watch window, and I STILL get the exception. This issue truly has me baffled.

I also noticed there was a IdeaBlade.Validation.VerifierOptions.SystemDefault which also has ShouldTreatEmptyStringAsNull. I'm not allowed to modify that one, however, so I can't tell if it influences anything. ]]> Fri, 13 Apr 2012 03:49:31 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13298#13298 Non-nullable makes empty string invalid? : Hi alexander,You should set... http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13192#13192 Author: sbelini
Subject: 3369
Posted: 02-Apr-2012 at 10:46am

Hi alexander,
You should set ShouldTreatEmptyStringAsNull to false:
 
entityManager.VerifierEngine.DefaultVerifierOptions.ShouldTreatEmptyStringAsNull = false;
 
You can also find this information in the DevForce Resource Center.
 
Regards,
   Silvio.
]]> Mon, 02 Apr 2012 10:46:33 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13192#13192 Non-nullable makes empty string invalid? : I have some entities, some of... http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13181#13181 Author: alexander
Subject: 3369
Posted: 02-Apr-2012 at 4:44am

I have some entities, some of which have non-nullable string properties. If I set these to an empty string, though, and attempt saving them, I get the following unexpected error message:

"FieldName is required"

Yeah, well, I set FieldName to something, I set it to "". Why does your code treat "not null" as "not empty string"? They are not the same thing.
]]> Mon, 02 Apr 2012 04:44:00 -700 http://www.ideablade.com/forum/forum_posts.asp?TID=3369&PID=13181#13181