Question

I’ve been having a heck of a time getting this query right, so I’m hoping that StackOverflow can point me in the right direction.

I have three tables:

• Territories (TerritoryId, TerritoryName, etc)
• UserTerritories (Just a gerrund)
• Users (UserId, UserName, StatusId)

I need to get all the Territories that have one or more Users with a StatusId of (let’s say) 3.

All I’ve really been able to get to compile is linking up all the tables 🙁

IEnumerable<Territory> territories = (from t in db.Territories                                       join uXt in db.User_x_Territories on t.TerritoryId equals uXt.UserID into tJoin                                       from uXt in tJoin.DefaultIfEmpty()                                       join u in db.Users on uXt.UserID equals u.Id into uJoin                                       from u in uJoin.DefaultIfEmpty()                                       select t); 

Can anyone help me out? All I’ve been able to find online are fairly basic examples.

Answer 1

var territories = context.Territories     .Where(t=> t.UserTerritories.Any(ut=>ut.User.StatusId == 3)); 

It works as it reads 🙂

Just gets the territories that match the desired condition, which is to have any user with status id 3. Using the relations simplifies many of the queries.

Update: if you like it more the same with the query syntax

var territories = from t in context.Territories                   where t.UserTerritories.Any(ut=>ut.User.StatusId == 3))                   select t;