string('session_id')->comment('当前用户会话 ID')->default('')->after('customer_id'); $table->json('guest_shipping_address')->comment('游客配送地址')->nullable()->after('shipping_address_id'); $table->json('guest_payment_address')->comment('游客发票地址')->nullable()->after('payment_address_id'); }); Schema::table('cart_products', function (Blueprint $table) { $table->string('session_id')->comment('当前用户会话 ID')->default('')->after('customer_id'); }); } /** * Reverse the migrations. * * @return void */ public function down() { if (!Schema::hasColumn('carts', 'extra')) { return; } } };