无法映射 属性 'Property Name'，因为它的类型 'object' 不是受支持的原始类型或有效的实体类型

Question

我正在尝试制作一个 table，它有 2 个一对多的关联。

经过一些尝试，我修复了我能修复的问题，但我被那个错误困住了。

无法映射 属性 'Property Name'，因为它的类型 'object' 不是受支持的基本类型或有效的实体类型。

FluentAPI 的 DbContext class

public class ApplicationDbContext : IdentityDbContext
   {
       public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
           : base(options)
       {
       }

       public DbSet<Account> Accounts { get; set; }

       public DbSet<Transaction> Transactions { get; set; }

       protected override void OnModelCreating(ModelBuilder modelBuilder)
       {
           base.OnModelCreating(modelBuilder);

           modelBuilder.Entity<Transaction>()
               .HasOne(p => p.Receiver)
               .WithMany(t => t.ReceiveTransactions)
               .HasForeignKey(m => m.ReceiverID)
               .OnDelete(DeleteBehavior.Restrict);

           modelBuilder.Entity<Transaction>()
               .HasOne(p => p.Sender)
               .WithMany(t => t.SendTransactions)
               .HasForeignKey(m => m.SenderID)
               .OnDelete(DeleteBehavior.Restrict);
       }

   }

这是 classes

的其余部分

用户Class

public class ApplicationUser : IdentityUser
    {
        public ICollection<Transaction> SendTransactions { get; set; }
        public ICollection<Transaction> ReceiveTransactions { get; set; }
        public Account Account { get; set; }


        public ApplicationUser()
        {
        }
    }

交易

public class Transaction
    {
        [Key]
        public String TransactionID { get; set; }

        public String SenderID { get; set; }

        public String ReceiverID { get; set; }

        [DataType(DataType.DateTime)]
        public DateTime Date { get; set; }

        public String Currency { get; set; }

        public float Amount { get; set; }

        [ForeignKey("SenderID")]
        public ApplicationUser Sender { get; set; }

        [ForeignKey("ReceiverID")]
        public ApplicationUser Receiver { get; set; }
        public object ReceiverId { get; internal set; }

        public Transaction(String TransactionID, String SenderID, String ReceiverID, DateTime Date, String Currency, float Amount)
        {
            this.TransactionID = TransactionID;
            this.SenderID = SenderID;
            this.ReceiverID = ReceiverID;
            this.Date = Date;
            this.Currency = Currency;
            this.Amount = Amount;
        }
    }

Answer 1

public object ReceiverId { get; internal set; }

此 属性 导致错误，因为它不是 entity framework 可识别的映射类型。将数据类型更改为基本类型，如 int 或 string，或者删除 属性.