EF code first - Model compatibility cannot be checked because the database does not contain model metadata

Question

I have enabled automatic migrations. Then, I deleted my whole db. Next, i executed Update-database from command console, and it recreated my db. Then, I started

Answer 1

I use Entity Framework 6 , SQL 2008 R2 , VS 2013.
To solve this problem only use the following procedure :

1) delete existing db ( existing database that created with EF model{code first})
2) Run APP again.

Fore example query code (in Layout):
this code create db if my model is change and search username in user table.

    @{
        // Delete && Create ...
        Database.SetInitializer(new DropCreateDatabaseIfModelChanges());

        var db = new DBContext();
        var SearchingUser = db.Users.Where(c => c.UserName == "qwertyui");
        if (SearchingUser.Count() == 0) {
            var User = new Users { UserName = "qwertyui",Password = "12345678" };
            db.Users.Add(User);
            db.SaveChanges();
        }

    }


    @RenderSection("scripts", required: false)
    @RenderBody()