我有以下类表映射:EF Codefirst - 用流利的API
public class User
{
public Guid Id { get; set; }
public string Name { get; set; }
public bool Active { get; set; }
public string UserName { get; set; }
//keys
public ICollection<Conversation> Conversations { get; set; }
}
public class Conversation
{
public Guid ID { get; set; }
public ICollection<Message> Messages { get; set; }
public User RecipientUser { get; set; }
public User SenderUser { get; set; }
public DateTime CreatedDate { get; set; }
public DateTime ModifiedDate { get; set; }
}
我使用EntityTypeConfiguration用流利的API,它是:
public class UserConfig : EntityTypeConfiguration<User>
{
public UserConfig()
{
HasMany(x => x.Conversations).WithRequired(x => x.RecipientUser);
}
}
public class ConversationConfig : EntityTypeConfiguration<Conversation>
{
public ConversationConfig()
{
HasKey(x => x.ID);
HasRequired(x => x.RecipientUser).WithMany(x => x.Conversations);
}
}
这是一个简单的聊天应用程序。如果我现在是用户而不是我是消息的发送者。收件人用户是我正在向我发送信息的用户。 请建议我如何配置我的EntityTypeConfiguration。我遇到如下错误:违反了多重性约束。关系“DataAcessLayer.Conversation_RecipientUser”的角色'Conversation_RecipientUser_Target'具有多重性1或0..1。
对不起,但仍然有错误。 –
我在我的机器上试过了你的代码,我刚刚删除了HasRequired(x => x.RecipientUser).WithMany(x => x.Conversations)部分,因为这在你的UserConfig,HasMany(x => x .Conversations).WithRequired(x => x.RecipientUser)。你只应该声明一次。 –
嗨@Patrick请检查我的答案。谢谢。 –