用于导出 Firestore 备份数据的云功能。 使用 firebase-admin 还是 @google-cloud/firestore？

Question

I'm currently trying to build a cloud function to export my Firestore data to my Storage Bucket.

The only example I've found on the Firebase DOCs on how to do this:

https://googleapis.dev/nodejs/firestore/latest/v1.FirestoreAdminClient.html#exportDocuments

EXAMPLE

const firestore = require('@google-cloud/firestore');

const client = new firestore.v1.FirestoreAdminClient({
  // optional auth parameters.
});

const formattedName = client.databasePath('[PROJECT]', '[DATABASE]');
client.exportDocuments({name: formattedName})
  .then(responses => {
    const response = responses[0];
    // doThingsWith(response)
  })
  .catch(err => {
    console.error(err);
  });

From that example, it seems that I need to install @google-cloud/firestore as a dependency to my cloud function.

But I was wondering if I can access these methods using only the firebase-admin package.

I've thought of that because the firebase-admin has the @google-cloud/firestore as a dependency already.

> firebase-admin > package.json

"dependencies": {
    "@firebase/database": "^0.4.7",
    "@google-cloud/firestore": "^2.0.0",    // <---------------------
    "@google-cloud/storage": "^3.0.2",
    "@types/node": "^8.0.53",
    "dicer": "^0.3.0",
    "jsonwebtoken": "8.1.0",
    "node-forge": "0.7.4"
  },

QUESTION:

Is it possible to get an instance of the FirestoreAdminClient and use the exportDocuments method using just the firebase-admin ?

Or do I really need to install the @google-cloud/firestore as a direct dependency and work with it directly?

Answer 1

The way you're accessing the admin client is correct as far as I can tell.

const client = new admin.firestore.v1.FirestoreAdminClient({});

However, you probably won't get any TypeScript/intellisense help beyond this point since the Firestore library does not actually define detailed typings for v1 RPCs. Notice how they are declared with any types: https://github.com/googleapis/nodejs-firestore/blob/425bf3d3f5ecab66fcecf5373e8dd03b73bb46ad/types/firestore.d.ts#L1354-L1364

Answer 2

Here is an implementation I'm using that allows you to do whatever operations you need to do, based on the template provided by firebase here https://firebase.google.com/docs/firestore/solutions/schedule-export

In my case I'm filtering out collections from firestore I don't want the scheduler to automatically backup

const { Firestore } = require('@google-cloud/firestore')

const firestore = new Firestore()
const client = new Firestore.v1.FirestoreAdminClient()
const bucket = 'gs://backups-user-data'

exports.scheduledFirestoreBackupUserData = async (event, context) => {
  const databaseName = client.databasePath(
    process.env.GCLOUD_PROJECT,
    '(default)'
  )

  const collectionsToExclude = ['_welcome', 'eventIds', 'analyticsData']

  const collectionsToBackup = await firestore.listCollections()
    .then(collectionRefs => {
      return collectionRefs
        .map(ref => ref.id)
        .filter(id => !collectionsToExclude.includes(id))
    })


  return client
    .exportDocuments({
      name: databaseName,
      outputUriPrefix: bucket,
      // Leave collectionIds empty to export all collections
      // or define a list of collection IDs:
      // collectionIds: ['users', 'posts']
      collectionIds: [...collectionsToBackup]
    })
    .then(responses => {
      const response = responses[0]
      console.log(`Operation Name: ${response['name']}`)
      return response
    })
    .catch(err => {
      console.error(err)
    })
}

Answer 3

firebase-admin just wraps the Cloud SDK and re-exports its symbols. You can use the wrapper, or use the Cloud SDK directly, or even a combination of the two if you want. If you want to use both, you have to declare an explicit dependency on @google-cloud/firestore in order to be able to import it directly into your code.

Answer 4

这是关于如何通过混合 Cloud Scheduler、PubSub 和 Firebase 函数来进行自动 Firestore 备份的完整代码说明（我使用它并且效果很好） https://firebase.google.com/docs/firestore/solutions/schedule -出口