Google Cloud Datastore: Node.js Client

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Cloud Datastore Client Library for Node.js

A comprehensive list of changes in each version may be found in the CHANGELOG.

Read more about the client libraries for Cloud APIs, including the older Google APIs Client Libraries, in Client Libraries Explained.

Table of contents:


Before you begin

  1. Select or create a Cloud Platform project.
  2. Enable the Google Cloud Datastore API.
  3. Set up authentication with a service account so you can access the API from your local workstation.

Installing the client library

npm install @google-cloud/datastore

Using the client library

// Imports the Google Cloud client library
const {Datastore} = require('@google-cloud/datastore');

// Creates a client
const datastore = new Datastore();

async function quickstart() {
  // The kind for the new entity
  const kind = 'Task';

  // The name/ID for the new entity
  const name = 'sampletask1';

  // The Cloud Datastore key for the new entity
  const taskKey = datastore.key([kind, name]);

  // Prepares the new entity
  const task = {
    key: taskKey,
    data: {
      description: 'Buy milk',

  // Saves the entity
  console.log(`Saved ${}: ${}`);


Emulator returning DEADLINE_EXCEEDED, java.lang.OutOfMemoryError

Reference Issue: #95

When using the emulator, you may experience errors such as "DEADLINE_EXCEEDED" within your application, corresponding to an error in the emulator: "java.lang.OutOfMemoryError". These errors are unique to the emulator environment and will not persist in production.

A workaround is available, provided by @ohmpatel1997 here.


Samples are in the samples/ directory. Each sample's has instructions for running its sample.

SampleSource CodeTry it
Conceptssource codeOpen in Cloud Shell
Errorsource codeOpen in Cloud Shell
Exportsource codeOpen in Cloud Shell
Importsource codeOpen in Cloud Shell
Indexes.getsource codeOpen in Cloud Shell
Indexes.listsource codeOpen in Cloud Shell
Quickstartsource codeOpen in Cloud Shell
Add Tasksource codeOpen in Cloud Shell
Delete Tasksource codeOpen in Cloud Shell
Legacy Samplessource codeOpen in Cloud Shell
List Taskssource codeOpen in Cloud Shell
Update Tasksource codeOpen in Cloud Shell

The Google Cloud Datastore Node.js Client API Reference documentation also contains samples.

Supported Node.js Versions

Our client libraries follow the Node.js release schedule. Libraries are compatible with all current active and maintenance versions of Node.js.

Client libraries targeting some end-of-life versions of Node.js are available, and can be installed via npm dist-tags. The dist-tags follow the naming convention legacy-(version).

Legacy Node.js versions are supported as a best effort:

  • Legacy versions will not be tested in continuous integration.
  • Some security patches may not be able to be backported.
  • Dependencies will not be kept up-to-date, and features will not be backported.

Legacy tags available

  • legacy-8: install client libraries from this dist-tag for versions compatible with Node.js 8.


This library follows Semantic Versioning.

This library is considered to be General Availability (GA). This means it is stable; the code surface will not change in backwards-incompatible ways unless absolutely necessary (e.g. because of critical security issues) or with an extensive deprecation period. Issues and requests against GA libraries are addressed with the highest priority.

More Information: Google Cloud Platform Launch Stages


Contributions welcome! See the Contributing Guide.

Please note that this, the samples/, and a variety of configuration files in this repository (including .nycrc and tsconfig.json) are generated from a central template. To edit one of these files, make an edit to its templates in directory.


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