belongsTo(PurchaseReturn::class, 'purchase_return_id'); } public function purchaseDetail() { return $this->belongsTo(PurchaseDetails::class, 'purchase_detail_id'); } protected $casts = [ 'business_id' => 'integer', 'purchase_return_id' => 'integer', 'purchase_detail_id' => 'integer', 'return_amount' => 'double', 'return_qty' => 'double', ]; }