相关疑难解决方法(0)

当我删除Firebase数据库中的帖子时,我希望云功能相应地删除firebase存储中的帖子缩略图.我的问题是,当我试图删除缩略图时,我认为我没有正确找到图像文件.

这是我尝试过的:

const functions = require('firebase-functions')
const admin = require('firebase-admin')
const gcs = require('@google-cloud/storage')()

exports.deletePost = functions.database.ref('Posts/{pushId}').onWrite(event => {

  const original = event.data.val()
  const previous = event.data.previous.val()
  const pushId = event.params.pushId

  if (original === null)
    return

  const filePath = 'Posts/' + pushId + 'thumbnail.jpg'
  const bucket = gcs.bucket('postsapp-12312')
  const file = bucket.file(filePath)
  const pr = file.delete()


  return pr
});

这就是我在日志中得到的

ApiError:找不到Object.handleResp上的Object.parseHttpRespBody(/user_code/node_modules/@google-cloud/storage/node_modules/@google-cloud/common/src/util.js:192:30)(/ user_code/node_modules/@ google-cloud/storage/node_modules/@ google-cloud/common/src/util.js:132:18)at/user_code/node_modules/@ google-cloud/storage/node_modules/@ google-cloud/common/src /来自Request.self.callback的Request.inResponse [as _callback](/user_code/node_modules/@google-cloud/storage/node_modules/retry-request/index.js:120:7)的util.js:465:12(/ user_code/node_modules/@google-cloud/storage/node_modules/request/request.js:188:22)在requestTmit(events.js:191:7)的emitTwo(events.js:106:13)处.(/user_code/node_modules/@google-cloud/storage/node_modules/request/request.js:1171:10)在emit.ene(events.js:96:13)的Request.emit(events.js:188:7)

我是NodeJS的新手,我正在尝试为Firebase的Cloud Functions编写下一个方法.

我想要实现的目标:

1. 当用户从Firebase DB中删除Photo对象时,应该触发该函数;
2. 代码应从与Photo obj对应的Storage中删除文件对象.

这些是我的Firebase数据库结构:

照片/ {userUID}/{} photoUID

{
"dateCreated":      "2017-07-27T16:40:31.000000Z",
"isProfilePhoto":   true,
"isSafe":           true,
"uid":              "{photoUID}",
"userUID":          "{userUID}"
}

和Firebase存储格式:

照片/ {userUID}/{} photoUID .PNG

我正在使用的NodeJS代码:

    const functions = require('firebase-functions')
    const googleCloudStorage = require('@google-cloud/storage')({keyFilename: 'firebase_admin_sdk.json' })
    const admin = require('firebase-admin')
    const vision = require('@google-cloud/vision')();

    admin.initializeApp(functions.config().firebase)

    exports.sanitizePhoto = functions.database.ref('photos/{userUID}/{photoUID}')
        .onDelete(event => {

            let photoUID = event.data.key
            let userUID = event.data.ref.parent.key

            console.log(`userUID: ${userUID}, photoUID: ${photoUID}`);

            if (typeof photoUID === 'undefined' || typeof userUID === 'undefined') {
                console.error('Error while sanitize …