无法插入记录。给定的错误“表“ tbCustomer”不具有标识属性。无法执行SET操作”

Question

我在表上没有身份列，我不需要名为CountryID的同伴的身份。我将来自客户请求的CountryID值传递给CountryId列作为主键。一旦执行存储过程，我将得到上述错误，因为“表不具有标识属性。无法执行SET操作”。如何插入记录而不会出现此错误？

    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.None)]
    public int CountryID { get; set; }

    public string CountryName { get; set; }

    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.None)]
    public int LanguageId { get; set; }

   var result =  await tDBContext.Query<SpResponseMessage>().FromSql("exec sp_synchCountry " +
                 "@p0, @p1, @p2",
                  objCountry.CountryID,
                  objCountry.CountryName
                  objCountry.LanguageId).SingleOrDefaultAsync();

Answer 1

如果要将多个属性配置为实体的键（称为复合键）。只能使用Fluent API配置组合键-约定永远不会设置组合键，并且您不能使用数据注释来配置组合键。

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参考：https://docs.microsoft.com/en-us/ef/core/modeling/keys#fluent-api