EF6和预生成的视图

Question

I am using EF code first method in my project. Recently I updated EF version of my project to EF 6 using Package Manager Console.

All of my entities are inherited from a BaseEntity class as a super class :

public abstract class BaseEntity
{
    public virtual int Id { get; set; }


    States _state;

    [NotMapped]
    public States State { get; set;}

    public enum States
    {
        Unchanged,
        Added,
        Modified,
        Deleted
    }
    ....  
}

And also I don't add the BaseEntity in my DbContext , the program run without any problem, but since I added pre-generated views to my project using EF6 CodeFirst View Generation T4 Template for C# , when I generate the views there is no problem, but when I run my project, I got following error:

The current model no longer matches the model used to pre-generate the mapping views, as indicated by the ViewsForBaseEntitySets786b989cf4a349108a38357765a23070.MappingHashValue property. Pre-generated mapping views must be either regenerated using the current model or removed if mapping views generated at runtime should be used instead. See http://go.microsoft.com/fwlink/?LinkId=318050 for more information on Entity Framework mapping views.

Does know anyone where is the problem? Or at least what is the way to find the problem?

Answer 1

Most likely you are hitting this bug. The title suggests it was fixed in EF 6.1.0 alpha - can you try this release and confirm? If you still see the error can you create a bug on https://entityframework.codeplex.com/WorkItem/Create ? Be sure to attach your model - without the model it will be very hard to fix this bug. Another approach to take is to use a different project of mine - interactive EF view generation. You can find more details here and here . The project is available on NuGet . Finally, is your model really that big that you need to use pre-generated views? View generation has been greatly improved in EF6 (and more improvements are coming in 6.1) so I am curious if you really see a significant improvement in your application start up time when using pre-generated views.