Entity Framework 6 generates wrong context code

Question

At my workplace, we share a project that uses Entity Framework 6.0 for database operations.

In the repository I see modifications in the MyModel.Context.cs file (a function was added).

From this using block:

using System;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using System.Data.Objects;
using System.Data.Objects.DataClasses;
using System.Linq;

It was changed to this:

using System;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using System.Data.Entity.Core.Objects;
using System.Data.Objects.DataClasses;
using System.Linq;

[EdmFunction("MyEntities", "DbFunction1")]
public virtual IQueryable<DbFunction1_Result> DbFunction1(Nullable<System.Guid> id)
{
   //some code    
   return ((IObjectContextAdapter)this).ObjectContext.CreateQuery<DbFunction1_Result>("[MyEntities].[DbFunction1](@id)", parameter);
}

I updated my working copy and it compiles.

But, whenever I use the Update model from database, my code changes back to this:

using System;
using System.Data.Entity;
using System.Data.Entity.Infrastructure;
using System.Data.Objects;
using System.Data.Objects.DataClasses;
using System.Linq;

We both use EF 6.0 via NuGet.

When I check the EntityFramework dll's properties, I get this:

enter image description here

What could cause this?

Update your EDMX (or rather, the .tt) files.

CodeCaster
– CodeCaster

2015-04-14 10:05:14 +00:00
Commented Apr 14, 2015 at 10:05 — CodeCaster
– CodeCaster, Commented Apr 14, 2015 at 10:05

Tito · Accepted Answer · 2015-04-14 10:20:34Z

2

Because you need to edit the .tt file. Probably MyModel.Context.tt is the template file that generates the MyModel.Context.cs for you, it uses T4 to generate it each time you select Update model from database in your .edmx file.

edited Apr 14, 2015 at 10:20

answered Apr 14, 2015 at 10:13

Tito

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4 Comments

Nestor Over a year ago

But the T4 file is generated from the database based on the EF version I use, doesn't it?

Tito Over a year ago

The .cs is generated from the .tt file, the .tt only uses the parameters you change on the .edmx file. Try to copy and paste your code on this .tt file in the correct place and try to Update model from database, later check if it was generated on the Model.Context.cs.

Tito Over a year ago

Depends also on the version of the Visual Studio you use, please check this link msdn.microsoft.com/en-us/data/jj613116.aspx on DbContext Generator.

Nestor Over a year ago

It seems that the project has mixed EF referencies. It seemingly uses EF 6 but also contained a System.Data.Entity reference and the *.tt files were also EF5 compatible, so I delete them, and added a new code generation item as described in the MS guide. Now it gets compiled.

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