[英]Fluent nHibernate “not-null property references a null or transient value” with Foreign Key
我正在嘗試插入數據庫。 我有以下兩個實體:
用戶:
public class User
{
private UserDescription _userDescription;
public virtual uint Id { get; set; }
public virtual string Email { get; set; }
public virtual string Username { get; set; }
public virtual UserDescription UserDescription
{
get { return _userDescription; }
set { _userDescription = value; }
}
public virtual void Add(UserDescription userDescription)
{
if (_userDescription != null)
{
_userDescription.User = null;
}
_userDescription = userDescription;
_userDescription.User = this;
}
public class UserMap : ClassMap<User>
{
public UserMap()
{
Table("users");
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.Email).Not.Nullable();
Map(x => x.Username).Not.Nullable();
HasOne(x => x.UserDescription).Cascade.All().LazyLoad();
}
}
}
和USERDESCRIPTION :
public class UserDescription
{
public virtual uint Id { get; set; }
public virtual User User { get; set; }
public virtual uint UserId { get; set; }
public virtual string Firstname { get; set; }
public virtual string Lastname { get; set; }
public class UserDescrptionMap : ClassMap<UserDescription>
{
public UserDescrptionMap()
{
Table("usersdescription");
Id(x => x.Id).GeneratedBy.Identity();
Map(x => x.UserId);
Map(x => x.Firstname);
Map(x => x.Lastname);
HasOne(x => x.User).Constrained().ForeignKey();
}
}
}
我通過的JSON如下所示:
{
"Email": "Example3@gmail.com",
"Username": "Something123",
"UserDescription": {
"Firstname": "John",
"Lastname": "Doe"
}
}
我嘗試對User進行插入,希望它可以向下層疊並插入子表UserDescription中,但這沒用。 因此,我先插入用戶,然后再插入UserDescription(不確定這是否理想)。
無論如何,當我成功插入到User后嘗試插入UserDescription時,出現以下錯誤:
not-null屬性引用null或瞬態值Users.Entities.UserDescription.User
有什么建議么?
如果有人感興趣,我在UserDescription映射中刪除了“ .Constrained()”,這似乎可行。 雖然我不知道這是否是最好的解決方案!
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