public function up(): void 	{ 		Schema::create('order_items', function (Blueprint $table): void { 			$table->uuid('id')->primary(); 			$table->uuid('order_id'); 			$table->uuid('product_id')->nullable(); 			$table->uuid('product_variant_id')->nullable(); 			$table->float('price'); 			$table->float('tax')->nullable(); 			$table->float('discount_amount')->nullable(); 			$table->json('discounts_applied')->nullable(); 			$table->json('order_item_details');  			$table->foreign('order_id')->references('id')->on('orders')->onDelete('cascade'); 			$table->foreign('product_id')->references('id')->on('products')->onDelete('set null'); 			$table->foreign('product_variant_id')->references('id')->on('product_variants')->onDelete('set null');  			$table->timestamps(); 		}); 	}