Wechat applet cloud function batch delete multiple data error: errcode: -502005 database collection not exists

Because only one item can be deleted locally , So use the cloud function to delete multiple records , I've been looking for it all day bug, The key is The cloud function compiler does not prompt errors , You can only view by returning content , Make a note of ：

Calling cloud functions locally js：

wx.cloud.callFunction({
    
 name: 'lockRemove', //  Cloud function name 
  data: {
    
    orderCode : this.data.orderCode
  },success: function(res){
    
    console.log(res); //  The return is   The result of calling the cloud function , Not the result of cloud function execution 
  },fail: function(res){
    
    console.log(res);
  }
})

Cloud functions ：
This place has stepped on many pits by itself ：

1. First cloud.init ： The company has two cloud environments ,app.js A is defined in env, I think there is no need to define , But always if init Not inside env, Will be submitted to the “Error: errCode: -502005 database collection not exists” abnormal .
2. Check the document before , Many people write the wrong table name to cause this exception ,collection（‘collectionName’）
3. Like the second , Be careful Spelling of words , There are some, like collection Misspelled words , The cloud function has no error prompt （ This is dog blood ）, So be sure to check your code .
4. Definition cloud、init、datebase Not one less .
5. Right click your cloud function folder to see your Cloud environment Is it the same as the definition , If you call a cloud function , No results returned , We have to develop our own cloud – Check whether there are cloud functions uploaded by yourself in the cloud function list , without , Maybe the environment is wrong , Remember to correct .

//  Used  async await  grammar 
const cloud = require('wx-server-sdk')
cloud.init({
    
  env: 'br-20210607-0gcoovhi30xxxxx' //  This place puts its own cloud function environment 
})
const db = cloud.database()
const _ = db.command

exports.main = async (event, context) => {
    
  let {
    
    orderCode
  } = event;
  console.log(orderCode); // console The result is   Development of cloud -- Cloud functions -- Check... In the log 
  try {
    
    return await  db.collection('lock').where({
    
      orderCode: orderCode
    }).remove() //  Return the result of the call 
  } catch(e) {
    
    console.error(e)
  }
}

If the call succeeds Return the data Pictured ：

I've been looking for it all day bug, Mind blowing up , If you have the same problem , There are other exceptions to solve , You can also leave a message to help more cute ~