php - How to select models where all relations have a specific property set to a specific value with Laravel? -

normally, i'm dealing queries have 2 models , need select 1 model wherehas query, greedy condition selects many matches possible.

here 2 models:

class part extends eloquent {     protected $table = 'parts';     protected $primarykey = 'part_id';      public function partflights() {         return $this->hasmany('partflights');     } } 

and

class partflight extends eloquent {     protected $table = 'part_flights_pivot';     protected $primarykey = 'part_flight_id';      public function part() {         return $this->belongsto('spacecraft');     } } 

as can see, there's 1:m relationship between part , partflight.

what want non-greedy match select part's partflight's have attribute landed set true. how can achieve this?

instead of trying find out if true suggest check if none false ;)

$parts = part::wheredoesnthave('partflights', function($q){     $q->where('landed', false); })->get();