'boolean', 'created_at' => 'datetime', 'updated_at' => 'datetime', ]; protected function serializeDate(DateTimeInterface $date) { return $date->format('Y-m-d H:i:s'); } public function customer() { return $this->belongsTo(Customer::class, 'customer_id', 'uuid'); } public function product() { return $this->belongsTo(Product::class, 'product_id', 'uuid'); } }