googleapis
Google Cloud Datastore: Node.js Client
Cloud Datastore Client Library for Node.js
A comprehensive list of changes in each version may be found in the CHANGELOG.
- 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
- Select or create a Cloud Platform project.
- Enable the Google Cloud Datastore API.
- Set up authentication so you can access the API from your local workstation.
Installing the client library
npm install @google-cloud/datastoreUsing 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. Each sample's README.md has instructions for running its sample.
| Sample | Source Code | Try it |
|---|---|---|
| Concepts | source code |  |
| Error | source code | |
| Export | source code | |
| Import | source code | |
| Indexes.get | source code | |
| Indexes.list | source code | |
| Create a union between two filters | source code | |
| Run query explain (regular query) | source code | |
| Run query explain (aggregate query) | source code | |
| Run query explain analyze (regular query) | source code | |
| Run query explain analyze (aggregate query) | 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.
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. If you are using an end-of-life version of Node.js, we recommend that you update as soon as possible to an actively supported LTS version.
Google's client libraries support legacy versions of Node.js runtimes on a best-efforts basis with the following warnings:
- Legacy versions are not tested in continuous integration.
- Some security patches and features cannot be backported.
- Dependencies cannot be kept up-to-date.
Client libraries targeting some end-of-life versions of Node.js are available, and
can be installed through npm dist-tags.
The dist-tags follow the naming convention legacy-(version).
For example, npm install @google-cloud/datastore@legacy-8 installs client libraries
for versions compatible with Node.js 8.
Versioning
This library follows Semantic Versioning.
This library is considered to be 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 stable libraries are addressed with the highest priority.
More Information: Google Cloud Platform Launch Stages
Contributing
Contributions welcome! See the Contributing Guide.
Please note that this README.md, the samples/README.md,
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.
License
Apache Version 2.0
See LICENSE