I am trying to do something simple, but I can't figure it out. Using EF6, I have 2 tables which are associated by an intermediate associative table, giving a many-to-many relationship:
I want to query all users who belong to a list of families. So I get an array of families:
var db = new MyProjectEntities(); User user = GetUserById((int)HttpContext.Current.Session["CurrentUserId"]); var families = db.Users.Where(u => u.UserId == user.UserId).First().Families.ToArray();
Then I want to query all users belonging to these families:
var users = db.Users.Where(u => families.Contains(u.Families));
But I get this error:
Instance argument: cannot convert from 'Database.Family' to 'System.Linq.IQueryable>'
Thanks in advance.
You can use Any method:
var users = db.Users.Where(u => u.Families.Any(fam => families.Contains(fam))).AsEnumerable();
I think this is what you're searching for.