firebase云功能console.log的奇怪问题

Question

我在 firebase 云功能中遇到了一种情况，其中只执行了 FIRST console.log 或 firestore 更新语句。

我还有其他类似的功能，响应的处理方式略有不同，但这没有任何问题

我已经检查了谷歌云控制台/firebase 控制台等，源代码似乎已正确上传

exports.myFunction = functions.firestore.document(docPath).onCreate(async (snapshot, context) => {

  var inputData = snapshot.data();
  console.log('printing request');
  console.log(inputData);

  //Prepare to call the api
  var data = {'input': 'some value'};
  var resource = 'api_resource';

  // call api - below function is provided by an external provider and takes a callback function once api call is complete

  myApi.call(resource, data.input, function (error, result) {
    if (error) {
      console.log('Error from api');
      return { status: 'error', code: 401, message: 'Error from api' }
    }

    var apiResult = JSON.parse(result);
    console.log('printing api response'); // <-- Anything below this does not get executed. When this is removed, next line is executed and so on 
    console.log(apiResult);  

    //Write to Firestore
    snapshot.ref.update({
      'status': 'computed',
    })
      .then((a) => {
        console.log('Written successfully to db');
        return 0;
      })
      .catch(err => {
        console.log('Error setting db' + err);
        return { status: 'error', code: 401, message: 'Error setting db ' }
      });

    // console.log('End of function');
    return { status: 'success', code: 200, message: 'Completed successfully' }
  });
});

我看到另一个post 与这种情况相反。有人知道为什么会这样吗？

Answer 1

您需要将同步 API 包装在 Promise 中 - 详细信息 here 和 here。

代码可能类似于：

exports.myFunction = functions.firestore.document(docPath).onCreate( (snapshot, context) => {

  var data = 'some value'
  var resource = 'api_resource';

  const myAPIPromise = (resource, data) => {
    return new Promise((resolve, reject) => {
      myApi.call(resource, data, (error, result) => {
        if (error) reject(error)
        else resolve(result)
      });
    })
  }

  myAPIPromise(resource, data)
  .then((result) => console.log(result))
  .catch((err) => console.log(err))

});

您显然希望重新添加所有无关的日志并调用 Firestore，为了清楚起见，我将其删除。