修改bug

src/pages/buy/index.vue

@@ -83,6 +83,9 @@ export default {
     },
     isBackFormWxPay () {
       return window.sessionStorage.getItem('isBackFormWxPay')
+    },
+    openId () {
+      return window.localStorage.getItem('openId')
     }
   },
   beforeMount() {
@@ -156,7 +159,7 @@ export default {
       getOpenId({ code, identity: 'ezijing' }).then(response => {
         if (response.code === 0) {
           this.openId = response.openid
-          window.localStorage.setItem('open_id', this.openId)
+          window.localStorage.setItem('openId', this.openId)
         } else {
           this.getCode()
         }