Build service

Build a service by using various CRUD methods.

Explore further

For detailed documentation that includes this code sample, see the following:

• Getting started with the Firestore in Datastore mode API

Code sample

C#

To learn how to install and use the client library for Datastore mode, see Datastore mode client libraries. For more information, see the Datastore mode C# API reference documentation.

To authenticate to Datastore mode, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// Create an authorized Datastore service using Application Default Credentials.
_db = DatastoreDb.Create(projectId);
// Create a Key factory to construct keys associated with this project.
_keyFactory = _db.CreateKeyFactory("Task");

Go

To learn how to install and use the client library for Datastore mode, see Datastore mode client libraries. For more information, see the Datastore mode Go API reference documentation.

To authenticate to Datastore mode, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"context"
	"log"

	"cloud.google.com/go/datastore"
)

func createClient(projectID string) (*datastore.Client, error) {
	ctx := context.Background()
	client, err := datastore.NewClient(ctx, projectID)
	if err != nil {
		log.Fatalf("Could not create datastore client: %v", err)
	}
	// Note: call the following from main() to ensure the client
	// properly frees all resources.
	// defer client.Close()
	return client, nil
}

Java

To learn how to install and use the client library for Datastore mode, see Datastore mode client libraries. For more information, see the Datastore mode Java API reference documentation.

To authenticate to Datastore mode, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// Create an authorized Datastore service using Application Default Credentials.
private final Datastore datastore = DatastoreOptions.getDefaultInstance().getService();

// Create a Key factory to construct keys associated with this project.
private final KeyFactory keyFactory = datastore.newKeyFactory().setKind("Task");

Node.js

To learn how to install and use the client library for Datastore mode, see Datastore mode client libraries. For more information, see the Datastore mode Node.js API reference documentation.

To authenticate to Datastore mode, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

// By default, the client will authenticate using the service account file
// specified by the GOOGLE_APPLICATION_CREDENTIALS environment variable and use
// the project specified by the GCLOUD_PROJECT environment variable. See
// https://googlecloudplatform.github.io/google-cloud-node/#/docs/datastore/latest/guides/authentication
const {Datastore} = require('@google-cloud/datastore');

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

PHP

To learn how to install and use the client library for Datastore mode, see Datastore mode client libraries. For more information, see the Datastore mode PHP API reference documentation.

To authenticate to Datastore mode, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

use Google\Cloud\Datastore\DatastoreClient;

/**
 * Create a Cloud Datastore client.
 *
 * @param string $projectId The Google Cloud project ID.
 */
function build_service(string $projectId)
{
    $datastore = new DatastoreClient(['projectId' => $projectId]);
    return $datastore;
}

Python

To learn how to install and use the client library for Datastore mode, see Datastore mode client libraries. For more information, see the Datastore mode Python API reference documentation.

To authenticate to Datastore mode, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

from google.cloud import datastore

def create_client(project_id):
    return datastore.Client(project_id)

Ruby

To learn how to install and use the client library for Datastore mode, see Datastore mode client libraries. For more information, see the Datastore mode Ruby API reference documentation.

To authenticate to Datastore mode, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

require "google/cloud/datastore"

datastore = Google::Cloud::Datastore.new

What's next

To search and filter code samples for other Google Cloud products, see the Google Cloud sample browser.