lambda expression in entity framework including relations

Question

i am trying to find all the friends of a user lets imagine the two tables

Users(UserID , Name) FriendShips(id,CreatorID,FriendID,Accepted) CreatorID and FriendID are foreign key of Users table

the query below should return all the users that are "Friends" with the User with UserID= 1; but its returning something else

Int64 userID =1; 
ctx.Users.Where(x => x.FriendShips.All(y => y.Accepted == true && y.CreatorID == userID)).ToList();

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if someone can tell me what should the query be using the lambda expression i will be grateful.

Answer 1

try flipping the query around

ctx.Friendships.Where(y=>y.CreatorID==userID && y.Accepted==true).Select(y=>y.User).Distinct();

If FriendShips have many Users, the query would be

ctx.Friendships.Where(y=>y.CreatorID==userID && y.Accepted==true).SelectMany(y=>y.Users).Distinct();

Answer 2

Your query returns users whose all friends have the specific id. I don't think this is your intention. Instead, you'd like users whose any friend has the specific id (and has other friends possibly).