firestore-to-bigquery-export

1.7.2 • Public • Published

Firestore to BigQuery export

NPM package for copying and converting Cloud Firestore data to BigQuery.

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Firestore is awesome. BigQuery is awesome. But transferring data from Firestore to BigQuery sucks. This package lets you plug and play your way out of config hell.

  • Create a BigQuery dataset with tables corresponding to your Firestore collections.
  • Table schemas are automatically generated based on your document property data types.
  • Convert and copy your Firestore collections to BigQuery.

This package doesn't write anything to Firestore.

Contents

Installation

npm i firestore-to-bigquery-export

import bigExport from 'firestore-to-bigquery-export'
 
// or
 
const bigExport = require('firestore-to-bigquery-export')
 
// then
 
const GCPSA = require('./Your-Service-Account-File.json')
bigExport.setBigQueryConfig(GCPSA)
bigExport.setFirebaseConfig(GCPSA)

How to

API

bigExport.setBigQueryConfig(
  serviceAccountFile // JSON
)
bigExport.setFirebaseConfig(
  serviceAccountFile // JSON
)
bigExport.createBigQueryTable(
  datasetID, // String
  collectionName, // String
  verbose // boolean
)
// returns Promise<Array>
bigExport.copyToBigQuery(
  datasetID, // String
  collectionName, // String
  snapshot // firebase.firestore.QuerySnapshot
)
// returns Promise<number>
bigExport.deleteBigQueryTable(
  datasetID, // String
  tableName // String
)
// returns Promise<Array>

Examples

/* Create table 'account' in BigQuery dataset 'firestore'. You have to create the dataset beforehand.
 * The given table name has to match the Firestore collection name.
 * Table schema will be autogenerated based on the datatypes found in the collections documents.
 */
await bigExport.createBigQueryTable('firestore', 'accounts')

Then, you can transport your data:

/* Copying and converting all documents in the given Firestore collection snapshot.
 * Inserting each document as a row in tables with the same name as the collection, in the dataset named 'firestore'.
 * Cells (document properties) that doesn't match the table schema will be rejected.
 */
const snapshot = await firebase.collection('payments').get()
const result = await bigExport.copyToBigQuery('firestore', 'payments', snapshot)
console.log('Copied ' + result + ' documents to BigQuery.')
 
/*
 * You can do multiple collections async, like this.
 * If you get error messages, you should probably copy fewer collections at a time.
 */
const collectionNames = ['payments', 'profiles', 'ratings', 'users']
 
for (const name of collectionNames) {
  const snapshot = await firestore.collection(name).get()
  await bigExport.copyToBigQuery('firestore', name, snapshot)
}

After that, you may want to refresh your data. For the time being, the quick and dirty way is to delete your tables and make new ones:

// Deleting the given BigQuery table.
await bigExport.deleteBigQueryTable('firestore', 'accounts')

Keep in mind

  • If there's even one prop value that's a FLOAT in your collection during schema generation, the column will be set to FLOAT.
  • If there are ONLY INTs, the column will be set to INTEGER.
  • All columns will be NULLABLE.

Limitations

  • Your Firestore data model should be consistent. If a property of documents in the same collection have different data types, you'll get errors.
  • Patching existing BigQuery sets isn't supported (yet). To refresh your datasets, you can deleteBigQueryTables(), then createBigQueryTables() and then copyCollectionsToBigQuery().
  • Changed your Firestore data model? Delete the corresponding BigQuery table and run createBigQueryTables() to create a table with a new schema.
  • When running this package via a Cloud Function, you may experience that your function times out if your Firestore is large, (Deadline Exceeded). You can then:

Issues

Please use the issue tracker.

To-do

  • Improve the handling of arrays.
  • Implement patching of tables.

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Install

npm i firestore-to-bigquery-export

Weekly Downloads

15

Version

1.7.2

License

MIT

Unpacked Size

24.3 kB

Total Files

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Collaborators

  • johannes-berggren