Cloud Function 将新文档从 Firestore 导出到 GCP 存储桶

Question

我正在尝试编写一个云函数来仅导出添加到我的“评论”子集合中的新文档。此云功能的触发器是：Cloud Firestore。但是，我的云功能部署通过控制台失败。有人可以帮助我了解我的云功能有什么问题吗？

错误信息：

Deployment failure:

Build failed: /workspace/index.js:26
    }
    ^

SyntaxError: missing ) after argument list
    at new Script (vm.js:83:7)
    at checkScriptSyntax (internal/bootstrap/node.js:620:5)
    at startup (internal/bootstrap/node.js:280:11)
    at bootstrapNodeJSCore (internal/bootstrap/node.js:623:3); Error ID: d984e68f

云功能代码：

const firestore = require('@google-cloud/firestore');
const client = new firestore.v1.FirestoreAdminClient();

const bucket = 'gs://bucket_name'
exports.scheduledFirestoreBackup = (event, context) => {
  const databaseName = client.databasePath(
   // process.env.GCLOUD_PROJECT,
   "fs124",
    '(default)'
  );
return client
    .exportDocuments({
      name: databaseName,
      outputUriPrefix: bucket,
      collectionIds: ['reviews'],
    })
    .onSnapshot()
    .then(snap => {
        snap.forEach(doc => {
      const response = doc.data();
      console.log(doc.data());
      return response;
    }
    
});

控制台 sn-p:

Answer 1

您收到的消息SyntaxError: missing ) after argument list 非常清楚。您缺少then() 的右大括号} 和括号)。它应该看起来像这样：

const firestore = require('@google-cloud/firestore');
const client = new firestore.v1.FirestoreAdminClient();

const bucket = 'gs://bucket_name'
exports.scheduledFirestoreBackup = (event, context) => {
  const databaseName = client.databasePath(
   // process.env.GCLOUD_PROJECT,
   "fs124",
    '(default)'
  );
return client
    .exportDocuments({
      name: databaseName,
      outputUriPrefix: bucket,
      collectionIds: ['reviews'],
    })
    .onSnapshot()
    .then(snap => {
        snap.forEach(doc => {
      const response = doc.data();
      console.log(doc.data());
      return response;
        }); 
    });
};