After the applet wx.setstoragesync, sometimes it can't get data with getstoragesync

background ：
I can't get the store number on the shopping cart page

problem ：
yes wx.getStorageSync It is caused by not getting a value .

Current implementation ：
Yes, save it after obtaining it wx.setStorageSync("merchantNo", userStoreInfo.data.merchantNo),
Take it directly every time you use it merchantNo: wx.getStorageSync("merchantNo").

solve ：
1、 Write it directly as asynchronous acquisition , When the value cannot be obtained, go to the background again ;2、 When it is put into the cache, it is also saved into the global variable , The value is taken from the global or cache , If you can't get the data at this time, you can ask for re assignment asynchronously .

async goAgain(e) {
    
    let params_ = {
    
      orderNo: e.currentTarget.dataset.orderNo,
      // merchantNo: wx.getStorageSync("merchantNo")
      merchantNo: await this.getMerchantNo()
    }
    console.log('params_', params_)
    oneMoreOrder(params_).then(res => {
    
      if (res.code == 0) {
    
        NCart.initNum()
        wx.switchTab({
    
          url: "/pages/shopping/cart"
        });
      } else {
    
        wx.showToast({
    
          title: res.msg,
          duration: 2000,
          icon: "none"
        })
      }
    })
  },
  async getMerchantNo () {
    
    try {
    
      let value = wx.getStorageSync('merchantNo')
      if (value) {
    
        return value
      }
      let userStoreInfo = await getUserMerchant()
      return userStoreInfo.data.merchantNo
    } catch (e) {
    
      console.log('eeee', e)
    }
  },

Reference article ：
Applet wx.setStorageSync after , In use getStorageSync Sometimes it is impossible to obtain data
Use wx.getStorageSync Can't get value why ？
Wechat applet - Set local cache and read （ Sync , asynchronous ）