EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType - asp.net

Question

I am getting these errors when trying to create a merchant.
FlavorPing.Models.IdentityUserLogin: : EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType.
FlavorPing.Models.IdentityUserRole: : EntityType 'IdentityUserRole' has no key defined. Define the key for this EntityType.
UserLogins: EntityType: EntitySet 'UserLogins' is based on type 'IdentityUserLogin' that has no keys defined.
UserRoles: EntityType: EntitySet 'UserRoles' is based on type 'IdentityUserRole' that has no keys defined."
Here is my merchant model:
namespace FlavorPing.Models
{
public class Merchant
{
//Meant to inherit identity.
//[ForeignKey("ApplicationUserId")]
public string ApplicationUserId { get; set; }
[ForeignKey("ApplicationUser")]
public virtual List<ApplicationUser> ApplicationUser { get; set; }
[Key]
public int MerchantID { get; set; }
[Required]
[Display(Name = "Business Name")]
public string MerchantName { get; set; }
[Required]
[Display(Name = "Email")]
[DataType(DataType.EmailAddress)]
public string email { get; set; }
//need to create formatting here.
[Required]
[Display(Name = "Web Site Link")]
public string website { get; set; }
//public int MenuItemID { get; set; }
public virtual List<MenuItem> MenuItems { get; set; }
public virtual MerchantDetails MerchantDetails { get; set; }
public ICollection<FollowerMenuItemMerchant> FollowerMenuItemMerchants { get; set; }
}
}
Here is the create controller for merchant, which is where I am getting the error:
// POST: Merchants/Create
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "MerchantID,MerchantName,email,website")] Merchant merchant)
{
if (ModelState.IsValid)
{
merchant.ApplicationUserId = User.Identity.GetUserId();
db.Merchants.Add(merchant);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(merchant);
}
Here is my DBContext:
namespace FlavorPing.Models
{
public class FlavorPingContext : IdentityDbContext
{
public FlavorPingContext()
: base("name=FlavorPingContext")
{
}
public System.Data.Entity.DbSet<FlavorPing.Models.Merchant> Merchants { get; set; }
public System.Data.Entity.DbSet<FlavorPing.Models.MenuItem> MenuItems { get; set; }
public System.Data.Entity.DbSet<FlavorPing.Models.MerchantDetails> MerchantDetails { get; set; }
public System.Data.Entity.DbSet<FlavorPing.Models.Follower> Followers { get; set; }
public System.Data.Entity.DbSet<FlavorPing.Models.FollowerMenuItemMerchant> FollowerMenuItemMerchants { get; set; }
public DbSet<IdentityUserLogin> UserLogins { get; set; }
public DbSet<IdentityUserClaim> UserClaims { get; set; }
public DbSet<IdentityUserRole> UserRoles { get; set; }
protected override void OnModelCreating(DbModelBuilder builder)
{
// Primary keys
builder.Entity<Follower>().HasKey(q => q.FollowerID);
builder.Entity<MenuItem>().HasKey(q => q.MenuItemID);
builder.Entity<Merchant>().HasKey(q => q.MerchantID);
builder.Entity<FollowerMenuItemMerchant>().HasKey(q =>
new
{
q.FollowerID,
q.MenuItemID,
q.MerchantID
});
// Relationships
builder.Entity<FollowerMenuItemMerchant>()
.HasRequired(t => t.Follower)
.WithMany(t => t.FollowerMenuItemMerchants)
.HasForeignKey(t => t.FollowerID);
builder.Entity<FollowerMenuItemMerchant>()
.HasRequired(t => t.MenuItem)
.WithMany(t => t.FollowerMenuItemMerchants)
.HasForeignKey(t => t.MenuItemID);
builder.Entity<FollowerMenuItemMerchant>()
.HasRequired(t => t.Merchant)
.WithMany(t => t.FollowerMenuItemMerchants)
.HasForeignKey(t => t.MerchantID);
builder.Conventions.Remove<PluralizingTableNameConvention>();
builder.Conventions.Remove<OneToManyCascadeDeleteConvention>();
}
}
}
I am trying to follow the example (option2) in this link: EntityType 'IdentityUserLogin' has no key defined. Define the key for this EntityType
I am trying Option 2 because I want to avoid having two DB's. But I am new to managing a DB so if you think I should do Option 3 please advise as to why, or if you see why I am getting this error please tell me why. Thanks in advance!

Answer 1

Ok I fixed my issue by adding this into my DBContext class.
builder.Entity<IdentityUserLogin>().HasKey<string>(l => l.UserId);
builder.Entity<IdentityRole>().HasKey<string>(r => r.Id);
builder.Entity<IdentityUserRole>().HasKey(r => new { r.RoleId, r.UserId });

Answer 2

I think you get the errors because your foreign key attributes aren't in the correct spot (and have the wrong name), instead of this:
public string ApplicationUserId { get; set; }
[ForeignKey("ApplicationUser")]
public virtual List<ApplicationUser> ApplicationUser { get; set; }
You need to do this:
[ForeignKey("ApplicationUser")]
public string ApplicationUserId { get; set; }
public virtual List<ApplicationUser> ApplicationUser { get; set; }
The ID is the foreign key to the virtual entity, not the other way around.