云功能可将新文档从Firestore导出到GCP存储桶

Question

我正在尝试编写一个云函数，只导出添加到我的“评论”子集中的新文档。这个云函数的触发器是: cloud Firestore。但是，我的云函数通过控制台部署失败。有没有人能帮我了解一下我的云函数出了什么问题？

错误消息：

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

云函数代码：

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;
    }
    
});

控制台代码片段：

​

Answer 1

你得到的信息，SyntaxError: missing ) after argument list是非常清楚的。您缺少then()的右花括号}和圆括号)。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;
        }); 
    });
};