I was combining my existing DBContext with the new IdentityDbContext in MVC 5. I managed to combine the two contexts but when I ran my application and the model was being created I was presented with the following error message:
Context.IdentityUserLogin: : EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType. Context.IdentityUserRole: : EntityType 'IdentityUserRole' has no key defined. Define the key for this EntityType.
I worked out how to fix it after doing a bit of reading.
Create the two following configuration classes (keeps it clean in your OnModelCreating method as your database grows and relationships between tables increase)
public class IdentityUserLoginConfiguration : EntityTypeConfiguration<IdentityUserLogin> { public IdentityUserLoginConfiguration() { HasKey(iul => iul.UserId); } } public class IdentityUserRoleConfiguration : EntityTypeConfiguration<IdentityUserRole> { public IdentityUserRoleConfiguration() { HasKey(iur => iur.RoleId); } } In the OnModelCreating method within your Applications DbContext add the two configurations outlined above to the model:
protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Configurations.Add(new IdentityUserLoginConfiguration()); modelBuilder.Configurations.Add(new IdentityUserRoleConfiguration()); } This should now get rid of the error methods when your model is being created. It did for me.
Don't bother with the configuration classes.
protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Entity<IdentityUserLogin>().HasKey<string>(l => l.UserId); modelBuilder.Entity<IdentityRole>().HasKey<string>(r => r.Id); modelBuilder.Entity<IdentityUserRole>().HasKey(r => new { r.RoleId, r.UserId }); } 
