belongsTo(Customer::class); } public function delivery() { return $this->belongsTo(Delivery::class); } public function scopeByCustomer($query, $customerId) { return $query->where($this->table.'.customer_id', $customerId); } public function scopeByDelivery($query, $deliveryId) { return $query->where($this->table.'.delivery_id', $deliveryId); } }