'integer', 'unit_price' => 'integer', 'subtotal' => 'integer', ]; } public function productVariant(): BelongsTo { return $this->belongsTo(ProductVariant::class); } public function restock(): BelongsTo { return $this->belongsTo(Restock::class); } public function user(): BelongsTo { return $this->belongsTo(User::class); } }