Resolving 'No key Defined' errors while using OnModelCreating with ApplicationDbContext?

Question

I\'ve been trying to create navigation properties for my collection types and I found this example of how one person accomplished it using OnModelCreating. I gave it a try i

Answer 1

You might have to add something like the following to OnModelCreating

modelBuilder.Entity().HasKey(l => l.UserId);
modelBuilder.Entity().HasKey(r => r.Id);
modelBuilder.Entity().HasKey(r => new { r.RoleId, r.UserId });

See also:

• Map tables using fluent api in asp.net MVC5 EF6?
• User in Entity type MVC5 EF6