Question

我正在尝试在Google的Cloud Functions中创建一个发布/订阅函数，该函数将自动删除Firestore数据库中一天之内的所有乐谱。

这就是我的 index.js：

/**
 * Triggered from a message on a Cloud Pub/Sub topic.
 *
 * @param {!Object} event Event payload.
 * @param {!Object} context Metadata for the event.
 */
const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

exports.helloPubSub = (event, context) => {
    const pubsubMessage = event.data;
    console.log(Buffer.from(pubsubMessage, 'base64').toString());

    function deleteCollection(db, collectionPath, batchSize) {
        // let collectionRef = db.collection(collectionPath);
        // let query = collectionRef.orderBy('__name__').limit(batchSize);

        const daysAgo = new Date();
        daysAgo.setHours(daysAgo.getHours() - 24);
        console.log(daysAgo);

        let citiesRef = db.collection('leaderboards');
        let query = citiesRef.doc('United States').collection('Daily')
            .where('timestamp', '>', daysAgo)
            .get()
            .then(snapshot => {
                snapshot.forEach(doc => {
                    console.log(doc.id, '=>', doc.data());
                });
            })
            .catch(err => {
                console.log('Error getting documents', err);
            });


        return new Promise((resolve, reject) => {
            deleteQueryBatch(db, query, batchSize, resolve, reject);
        });
    }
    function deleteQueryBatch(db, query, batchSize, resolve, reject) {
        query.get()
            .then((snapshot) => {
                // When there are no documents left, we are done
                if (snapshot.size === 0) {
                    return 0;
                }

                // Delete documents in a batch
                let batch = db.batch();
                snapshot.docs.forEach((doc) => {
                    batch.delete(doc.ref);
                });

                return batch.commit().then(() => {
                    return snapshot.size;
                });
            }).then((numDeleted) => {
            if (numDeleted === 0) {
                resolve();
                return;
            }

            // Recurse on the next process tick, to avoid
            // exploding the stack.
            process.nextTick(() => {
                deleteQueryBatch(db, query, batchSize, resolve, reject);
            });
        })
            .catch(reject);
    }

    };

这是我的 package.json中的内容：

{
  "name": "sample-pubsub",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "dependencies": {
    "firebase-admin": "^8.6.0",
    "firebase-functions": "^3.2.0",
    "@google-cloud/pubsub": "^1.1.1"
  },
  "keywords": [],
  "author": "Code_31",
  "license": "ISC"
}

当我尝试“测试功能”时，收到错误：

Error: function execution failed. Details: First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.

我是Cloud Functions和Node.js的新手，因此非常感谢我做错的任何帮助。谢谢！

Google Cloud Functions-Pub / Sub Node.js 8

0 个答案: