@google-cloud/datastore

Google Cloud Datastore: Node.js Client

Cloud Datastore Client Library for Node.js

• Google Cloud Datastore Node.js Client API Reference
• Google Cloud Datastore Documentation
• github.com/googleapis/nodejs-datastore

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

Table of contents:

• Quickstart
  • Before you begin
  • Installing the client library
  • Using the client library
• Samples
• Versioning
• Contributing
• License

Quickstart

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
  await datastore.save(task);
  console.log(`Saved ${task.key.name}: ${task.data.description}`);
}
quickstart();

Troubleshooting

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

Samples are in the samples/ directory. The samples' README.md has instructions for running the samples.

Sample	Source Code	Try it
Concepts	source code
Error	source code
Quickstart	source code
Add Task	source code
Delete Task	source code
Legacy Samples	source code
List Tasks	source code
Update Task	source code

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

Versioning

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

Contributing

Contributions welcome! See the Contributing Guide.

License

Apache Version 2.0

See LICENSE

Changelog

5.1.0 (2020-03-11)

Features

• add warning when int value is too large during upload (#591) (5a4821b)
• export protos in src/index.ts (3fe21ab)
• move library to Typescript code generation (#608) (d543aa6)

Bug Fixes

• handle large int out of bounds error in streams (#590) (25b1fc2)
• deps: update dependency @grpc/grpc-js to v0.7.0 (#613) (8b5d391)