"TypeError:functions.firestore.collection不是函数"

问题描述：

在Firestore文档中，我看到了许多functions.firestore.document的示例，但是没有看到functions.firestore.collection的任何示例. Firestore语法为

Looking through the Firestore documentation, I see many examples of functions.firestore.document but I don't see any examples of functions.firestore.collection. Firestore syntax is

firebase.firestore().collection('...').doc('...')

我收到一条错误消息

firebase.firestore().document('...')

使用以下代码在Cloud Functions中使用

Yet in Cloud Functions with this code:

exports.myFunction = functions.firestore.collection('...').doc('...').onUpdate(event => {

在部署时，我收到一条错误消息:

on deploy I get an error message:

TypeError: functions.firestore.collection is not a function

当我将代码更改为

exports.getWatsonTokenFirestore = functions.firestore.document('...').onUpdate(event => {

部署时没有收到错误消息.

I don't get an error message on deploy.

为什么Cloud Functions似乎具有与Cloud Firestore不同的数据结构?

Why does Cloud Functions appear to have a different data structure than Cloud Firestore?

这是我完整的云功能.我的收藏集是User_Login_Event，我的文档是Toggle_Value:

Here's my full Cloud Function. My collection is User_Login_Event and my document is Toggle_Value:

    exports.getWatsonTokenFS = functions.firestore.document('User_Login_Event/{Toggle_Value}').onUpdate(event => {
              var username = 'TDK',
              password = 'swordfish',
              url = 'https://' + username + ':' + password + '@stream.watsonplatform.net/authorization/api/v1/token?url=https://stream.watsonplatform.net/speech-to-text/api';
              request({url: url}, function (error, response, body) {
admin.firestore().collection('IBM_Watson_Token').document('Token_Value').update('token');
              });
              return 0; // prevents an error message "Function returned undefined, expected Promise or value"
            });

该函数的部署没有错误，但是在执行时，我收到以下错误消息:

The function deploys without error but when it executes I get this error message:

TypeError: firebase.firestore is not a function

我很困惑，因为firebase.firestore不在我的Cloud Function中.毫无问题，它在我的Angular前端代码中.此错误消息指的是什么?我试图换行

I'm confused as firebase.firestore isn't in my Cloud Function. It's in my Angular front-end code in various places, without a problem. What is this error message referring to? I tried changing the line

admin.firestore().collection('IBM_Watson_Token').document('Token_Value').update('token');

到

firebase.firestore().collection('IBM_Watson_Token').document('Token_Value').update('token');

和

console.log("getWatsonTokenFS response");

但是我得到了相同的错误消息.

but I got the same error message.

答

是.您应该将其格式化为...

Yes. You should format it as...

exports.getWatsonTokenFirestore = functions.firestore.document('myCollection/{documentId}').onUpdate(event => {
// code
});

collection和doc是firebase.firestore中的方法.要通过functions.firestore访问它们，必须使用document.

collection and doc are methods within firebase.firestore. To access them via functions.firestore, you must use document.

您可以看到 Cloud Firestore 以及用于 Firebase的云功能

我一直在研究您的代码.我已经添加了所有依赖项和初始化，我假定您在代码中拥有这些依赖项和初始化.我在IBM Watson请求中看不到您正在使用Firestore中的任何数据，也看不到如何将返回的任何数据写回到Firestore中.由于我不熟悉您的request方法，因此我对其进行了注释，以便为您提供Firestore更新并回写内容的有效示例.我还编辑了一些代码以使其更具可读性，并更改了Cloud Functions代码以反映今天发布的v1.0.0(我已经对其进行了一段时间的测试):)

I've been working on your code. I've added in all of the dependencies and initialization, which I assume that you have in your code. I can't see where you're using any data from Firestore in your IBM Watson request and I can't see how you're writing any of the returned data back to Firestore. As I'm not familiar with your request method, I've commented it out, to give you what should be a working example of an update to Firestore and writes something back. I also edited some of your code to make it more readable and changed the Cloud Functions code to reflect v1.0.0, released today (I've been testing it for a while) :)

const admin = require('firebase-admin');
const functions = require('firebase-functions');

admin.initializeApp();

const firestore = admin.firestore();

exports.getWatsonTokenFS = functions.firestore
  .document('User_Login_Event/{Toggle_Value}')
  .onUpdate((snap, context) => {

    let username = 'TDK';
    let password = 'swordfish';
    let url = `https://${username}:${password}@stream.watsonplatform.net/authorization/api/v1/token?url=https://stream.watsonplatform.net/speech-to-text/api`;

    // request({url}, function (error, response, body) {
    // firestore.doc(`${IBM_Watson_Token}/${Token_Value}`).update('token');
    // });

    return firestore.doc(`IBM_Watson_Token/Token_Value`).update('token')
    .then(response => {
      return Promise.resolve();
    })
    .catch(err => {
      return Promise.reject(err);
    });
});

"TypeError:functions.firestore.collection不是函数"

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