'int', 'origin_airports_id' => 'int', 'destination_airports_id' => 'int' ]; protected $fillable = [ 'title', 'file_id', 'tour_type', 'summary', 'description', 'origin_airports_id', 'destination_airports_id' ]; public function originAirport() { return $this->belongsTo(Airport::class, 'origin_airports_id'); } public function destinationAirport() { return $this->belongsTo(Airport::class, 'destination_airports_id'); } public function file() { return $this->belongsTo(File::class); } public function tour_details() { return $this->hasMany(TourDetail::class); } }