NHibernate2 query is wired when fetch the collection from the proxy. Is this correct behavior?
- by ensecoz
This is my class:
public class User
{
public virtual int Id { get; set; }
public virtual string Name { get; set; }
public virtual IList<UserFriend> Friends { get; protected set; }
}
public class UserFriend
{
public virtual int Id { get; set; }
public virtual User User { get; set; }
public virtual User Friend { get; set; }
}
This is my mapping (Fluent NHibernate):
public class UserMap : ClassMap<User>
{
public UserMap()
{
Id(x => x.Id, "UserId").GeneratedBy.Identity();
HasMany<UserFriend>(x => x.Friends);
}
}
public class UserFriendMap : ClassMap<UserFriend>
{
public UserFriendMap()
{
Id(x => x.Id, "UserFriendId").GeneratedBy.Identity();
References<User>(x => x.User).TheColumnNameIs("UserId").CanNotBeNull();
References<User>(x => x.Friend).TheColumnNameIs("FriendId").CanNotBeNull();
}
}
The problem is when I execute this code:
User user = repository.Load(1);
User friend = repository.Load(2);
UserFriend userFriend = new UserFriend();
userFriend.User = user;
userFriend.Friend = friend;
friendRepository.Save(userFriend);
var friends = user.Friends;
At the last line, NHibernate generate this query for me:
SELECT
friends0_.UserId as UserId1_,
friends0_.UserFriendId as UserFrie1_1_,
friends0_.UserFriendId as UserFrie1_6_0_,
friends0_.FriendId as FriendId6_0_,
friends0_.UserId as UserId6_0_
FROM "UserFriend" friends0_ WHERE friends0_.UserId=@p0; @p0 = '1'
QUESTION: Why the query look very wired? It should select only 3 fields (which are UserFriendId, UserId, FriendId) Am I right? or there is something going on inside NHibernate?
