Feature CTP Walkthrough: Self Tracking Entities for Entity Framework

re: Feature CTP Walkthrough: Self Tracking Entities for Entity Framework

JC — Fri, 13 Nov 2009 17:21:46 GMT

I'm trying the shelftracking entities and i have notice that when we call the method entity.AcceptChanges() it doesn't propagate the AcceptChanges to the child entities and when we make changes to a child entity the parent entity isn't warned that something has changed, is this normal or is it bug.

Many thanks

re: Feature CTP Walkthrough: Self Tracking Entities for Entity Framework

Jonathan — Thu, 12 Nov 2009 04:14:04 GMT

When will this walkthrough be adapted for CTP 2?

re: Feature CTP Walkthrough: Self Tracking Entities for Entity Framework

Biju Thomas — Fri, 04 Sep 2009 15:00:11 GMT

Hi am getting error

An item with the same key has already been added.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: An item with the same key has already been added.

Source Error:

Line 41: using (TContext context = new TContext())

Line 42: {

Line 43: context.ApplyChanges(this.EntitySet, entity, EntityChangeTrackerAdapter.GetSelfTrackingEntityInfo);

Line 44: context.SaveChanges(SaveOptions.DetectChangesBeforeSave);

Line 45: }

This is because i have two navigation propeties whic are pointing to same table

newRequirement.CreatedBy = new User();

newRequirement.CreatedBy.UserId = 1;

newRequirement.WorkflowUser = new User();

newRequirement.WorkflowUser.UserId = 1;

It will work wthout any issue if we comment WorkfolwUser lines

How we can solve this issue....

re: Feature CTP Walkthrough: Self Tracking Entities for Entity Framework

Biju Thomas — Mon, 31 Aug 2009 15:19:48 GMT

I want to initialize the some navigation properties to new instance when a new instance of an entity created using new operator

for eg.

I have one entity called Project wth a navigation property ApprovedBy of type 'User'. What i required is When we create Project p = new Project() it should also initialize

User _ApprovedBy = new User();

Now it will create only

User ApprovedBy;

Am using Self Tracking Entities Template.

I can chage the template but it will affect all entites generated by template.

Is there is any way to initialize a navigation property by setting something like 'Initialize New Instnace' through EDM Designer ?

re: Feature CTP Walkthrough: Self Tracking Entities for Entity Framework

tangrl — Fri, 07 Aug 2009 07:39:24 GMT

Will the new Entity Framework designer support Entity Framework + BaseEntity class model? Can somebody answer the question in this thread?

http://social.msdn.microsoft.com/Forums/en-US/adodotnetentityframework/thread/038d14e8-fc04-4b06-b1e4-d5b1a950a901

Thanks!

re: Feature CTP Walkthrough: Self Tracking Entities for Entity Framework

Nabil Sedoud — Fri, 31 Jul 2009 21:06:23 GMT

I make a test for this Walkthrough by using code only Context, and i receive this error "underlying connection was closed: The connection was closed unexpectedly"

I think that there is an incompatobility when use T4 SelftTracking with CodeOnly approche.

unfortunately it's an other limitation of EF

re: Feature CTP Walkthrough: Self Tracking Entities for Entity Framework

radyo dinle — Sun, 19 Jul 2009 17:43:41 GMT

Thank you for submitting this cool story

EF4 – Features CTP1

Matthieu MEZIL — Tue, 23 Jun 2009 08:59:55 GMT

Avec VS 2010 Beta 1, il manquait quelque features pour lesquelles l’EF team avait communiqué en disant

Описание Feature CTP : описание механизма Self Tracking Entities

progg.ru — Tue, 23 Jun 2009 08:11:01 GMT

Thank you for submitting this cool story - Trackback from progg.ru

Feature CTP Walkthrough: Self Tracking Entities for Entity Framework | ASP.NET MVC

Tue, 23 Jun 2009 07:24:10 GMT

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