首先在实体框架代码中更改CUD存储过程的命名约定

Question

I am using EF Code First against an existing database (aka "Code Second")

Many of the objects will use stored procedures for CUD operations. In code first I can specify that like this:

modelBuilder.Entity<Widget>
   .MapToStoredProcedures()

This will assume there are stored procedures named Widget_Insert , Widget_Update and Widget_Delete .

If I want to use different names, I can do this:

modelBuilder.Entity<Widget>
   .MapToStoredProcedures(s => s.Insert(i => i.HasName("pr_Widget_Merge"))
                                .Update(u => u.HasName("pr_Widget_Merge"))
                                .Delete(d => .HasName("pr_Widget_Delete")));

My question is, using custom conventions, is there a way to tell EF what my stored procedure naming convention is so I don't have to explicitly declare each stored procedure name for each class that I want to use them?

Answer 1

To change the stored procedure naming convention, you do something like the following:

modelBuilder.Types().Configure(c => c.MapToStoredProcedures(p => p.Update(u => u.HasName("pr_" + c.ClrType.Name + "_Merge"))));
modelBuilder.Types().Configure(c => c.MapToStoredProcedures(p => p.Insert(i => i.HasName("pr_" + c.ClrType.Name + "_Merge"))));
modelBuilder.Types().Configure(c => c.MapToStoredProcedures(p => p.Delete(d => d.HasName("pr_" + c.ClrType.Name + "_Delete"))));

With this, all of your entities will be mapped to stored procedures with the naming convention you specified.

Let's say that you don't want all of your entities to be mapped to stored procedures. You can create an interface and implement it on entities that you want to be mapped to stored procedures.

public interface IMapToProcs {}

Then, add that interface to the entities you want stored procedures to be mapped.

public class Widget : IMapToProcs

Now, in your DbContext implementation you can do this:

    modelBuilder.Types().Where(t => t.IsInstanceOfType(typeof(IMapToProcs))).Configure(c => c.MapToStoredProcedures(p => p.Update(u => u.HasName("pr_" + c.ClrType.Name + "_Merge"))));
    modelBuilder.Types().Where(t => t.IsInstanceOfType(typeof(IMapToProcs))).Configure(c => c.MapToStoredProcedures(p => p.Insert(i => i.HasName("pr_" + c.ClrType.Name + "_Merge"))));
    modelBuilder.Types().Where(t => t.IsInstanceOfType(typeof(IMapToProcs))).Configure(c => c.MapToStoredProcedures(p => p.Delete(d => d.HasName("pr_" + c.ClrType.Name + "_Delete"))));

Finally, this can be reduced to one line:

    modelBuilder.Types().Where(t => t.IsInstanceOfType(typeof(IMapToProcs)))
        .Configure(c => c.MapToStoredProcedures(p => p.Update(u => u.HasName("pr_" + c.ClrType.Name + "_Merge"))
                                                      .Insert(i => i.HasName("pr_" + c.ClrType.Name + "_Merge"))
                                                      .Delete(d => d.HasName("pr_" + c.ClrType.Name + "_Delete"))));