Entity Framework 6.1.3 Hierarchy id not working

What role does recursive hierarchies play in Entity Framework? Include() seems to be incompatible with it.

I've got an...Item... . ...Item... has a...Category... ....Category... has ...ID... , ...Name... as well as ...Children.......Parent... and ...Children... are of...Category... too....When I do a LINQ to Entities search for a certain...Item... it doesn't return the associated data....Category... even if I use the...Include("Category")... method. ...

In MVC2 Entity Framework 4, server-side validation of a REQUIRED String Property does not function.

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With certain cases, the OptimisticConcurrencyException does not operate in Entity Framework.

UPDATE (2010-12-21): Based on exams I've been taking, I completely reworked this question. Also, I thought my query was specifically related to POCO, but it turns out that it isn't....I have a timestamp column in my database table that should be utilized to monitor changes for optimistic concurrency and I'm using Entity Framework. I'm receiving err...

Inserting using a foreign key value rather than an ID in Entity Framework 4

I know this is a really simple question, but it's stumping me right now:...With a foreign key constraint of Many Students to One Course, I have two tables: Students and Courses....How would I be able to perform anything like this when creating a Student because I store a CourseId FK reference in my Students table?...Students student = new Students(...

Select * from Entities where Id = (select max(Id) from Entities) in Entity Framework

I have a collection of entities named...Entities... it includes a field...Name... with a field....Version... . I want to send back the item with the most recent version for the chosen...Name... ....For SQL, I'd go...Select * from table where name = 'name' and version = (select max(version) from table ...

Entity DataSource not working with Entity Framework 6 Upgrade

The Entity Datasource controls were giving me a ton of compile time build issues when I recently converted our Webforms application from EF 4.4 to EF6. When trying to access the context object, I typically encounter the following errors:...e.Context ...I followed the identical instructions provided in: ...http://entityframework.codeplex.com/wikipag...

Oracle ODP.Net With Entity Framework 6 - Entity framework database compatible provider could not be found

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Updating entity does not work in entity framework 6

Try the following code rather than adding in...context.Applicants.Add(objApplicant);... context.Entry(objApplicant).State = EntityState.Modified; context.SaveChanges(); ...Please try this code block: ...Update....... if (applicant != null) { applicant.FirstName = "TEST NAME"; c...

Entity Framework 6 "HasRequired" and "WithMany" partially working - not working as expected

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Entity Framework 6 Foreign Key using strings and not to source model ID

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