feat:购物车增加商品sku字段

backend/modules/shop/migrations/m191217_013625_add_column_sku_value_in_table_ats_cart.php

@@ -0,0 +1,20 @@
+<?php
+
+use yii\db\Migration;
+
+/**
+ * Class m191217_013625_add_column_sku_value_in_table_ats_cart
+ */
+class m191217_013625_add_column_sku_value_in_table_ats_cart extends Migration
+{
+    public function up()
+    {
+        $this->addColumn('ats_cart', 'sku_value', $this->string(120)->defaultValue('')->comment('商品sku'));
+    }
+
+    public function down()
+    {
+        $this->dropColumn('ats_cart', 'sku_value');
+        return true;
+    }
+}