Laravel Eloquent to join table and count related

Question

How do I use join with Eloquent taking in consideration the following table structure:

I have a properies table

---------------------
ID    | Name 
-         


        

Answer 1

This is more of a MySQL join+group+select trick which includes following steps.

1. Join your relation table(use join if you want to exclude rows with RoomsCount=0, else use leftJoin)
2. Use groupBy by primaryKey to avoid duplicates of the join.
3. Select count of joined table

    $this->model->leftJoin('Rooms', 'Properties.ID', '=', 'Rooms.Property')
      ->selectRaw('Properties.*, count(Rooms.RoomID) as RoomsCount')
      ->groupBy('Properties.ID')
      ->get();