的ASP.NET Web API標識屬性另一個的DbContext

Question

我StoreUser身份在我的ASP.NET Web API項目和StoreDbContext 在那裏我有Product模型和DbSet

這是我Product

public class Product 
{ 
    public int Id { get; set; } 
    public string CodeName { get; set; } 
    public decimal Cost { get; set; } 
    public decimal Discount { get; set; } 
    public int SoldCount { get; set; } 
    public string SellerId { get; set; } 
    public virtual StoreUser Seller { get; set; } 
    public virtual List<ProductImage> Images { get; set; } 
    public virtual List<Category> Categories { get; set; } 
    public virtual List<ProductText> Texts { get; set; } 
} 

這是我的StoreDbContext

public class StoreDbContext: DbContext 
{ 
    public StoreDbContext() : base("MyCoupon") 
    { 
     Database.SetInitializer(new StoreDbInitialier()); 
    } 

    public DbSet<Product> Products { get; set; } 
    public DbSet<ProductText> ProductTexts { get; set; } 
    public DbSet<ProductImage> Images { get; set; } 
    public DbSet<CategoryText> CategoryTexts { get; set; } 
    public DbSet<Category> Categories { get; set; } 
    public DbSet<Language> Languages { get; set; } 
} 

和thi s是我StoreUser類

public class StoreUser : IdentityUser 
{ 
    public virtual List<Product> Products { get; set; } = new List<Product>(); 
} 

使用戶可以有產品

，但是當我想將它們添加 與

[Authorize(Roles = "Seller")] 
    public IHttpActionResult Post(Product product) 
    { 
     var userId = HttpContext.Current.User.Identity.GetUserId(); 
     var userManager = HttpContext.Current.GetOwinContext().GetUserManager<StoreUserManager>(); 

     var user = userManager.FindById(userId); 
     product.Seller = user; 
     _db.Products.Add(product); 
     _db.SaveChanges(); 
     return Ok(product); 
    } 

我收到錯誤

Answer 1

你需要打電話給喲ur StoreDbContext類

protected override void OnModelCreating(DbModelBuilder modelBuilder) 
{ 
    base.OnModelCreating(modelBuilder); 
}