Firestore增量未定义？

Question

我有以下触发器，很难在父字段上进行递增。有什么建议吗？

​

const functions = require('firebase-functions');
const admin = require('firebase-admin');
const fieldValue = admin.firestore.FieldValue;
admin.initializeApp();

exports.onTicketCreate = functions.firestore
  .document('/contests/{contestId}/{tickets}/{ticketId}')
  .onWrite((snapshot, context) => { 

    functions.firestore.document('contests/' + context.params.contestId).update({
        points: fieldValue.increment(1)
    });
  });

​

错误

TypeError: Cannot read property 'increment' of undefined
at exports.onTicketCreate.functions.firestore.document.onWrite (/workspace/lib/index.js:27:48)
at cloudFunction (/workspace/node_modules/firebase-functions/lib/cloud-functions.js:132:23)
at Promise.resolve.then (/layers/google.nodejs.functions-framework/functions-framework/node_modules/@google-cloud/functions-framework/build/src/invoker.js:330:28)
at process._tickCallback (internal/process/next_tick.js:68:7) 

Answer 1

老实说，我不确定为什么它不能工作，但我让它在下面的代码中工作

import * as functions from 'firebase-functions';
import * as admin from 'firebase-admin';

admin.initializeApp();

exports.waitReportCreatedJS = functions.firestore
    .document('/contests/{contestId}/{tickets}/{ticketId}') 
    .onWrite((snapshot, context) => { 

    admin.firestore().doc('contests/' + context.params.contestId)
        .update({ points: admin.firestore.FieldValue.increment(1) })
        .then(() => console.log('this will succeed'))
        .catch(() => 'obligatory catch');
});