Quickstart

Save an entity.

Explore further

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

• Datastore mode client libraries

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.

using Google.Cloud.Datastore.V1;

namespace GoogleCloudSamples
{
    public class QuickStart
    {
        public static void Main(string[] args)
        {
            // Your Google Cloud Platform project ID
            string projectId = "YOUR-PROJECT-ID";

            // Instantiates a client
            DatastoreDb db = DatastoreDb.Create(projectId);

            // The kind for the new entity
            string kind = "Task";
            // The name/ID for the new entity
            string name = "sampletask1";
            KeyFactory keyFactory = db.CreateKeyFactory(kind);
            // The Cloud Datastore key for the new entity
            Key key = keyFactory.CreateKey(name);

            var task = new Entity
            {
                Key = key,
                ["description"] = "Buy milk"
            };
            using (DatastoreTransaction transaction = db.BeginTransaction())
            {
                // Saves the task
                transaction.Upsert(task);
                transaction.Commit();

                Console.WriteLine($"Saved {task.Key.Path[0].Name}: {(string)task["description"]}");
            }
        }
    }
}

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.

// Sample datastore-quickstart fetches an entity from Google Cloud Datastore.
package main

import (
	"context"
	"fmt"
	"log"

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

type Task struct {
	Description string
}

func main() {
	ctx := context.Background()

	// Set your Google Cloud Platform project ID.
	projectID := "YOUR_PROJECT_ID"

	// Creates a client.
	client, err := datastore.NewClient(ctx, projectID)
	if err != nil {
		log.Fatalf("Failed to create client: %v", err)
	}
	defer client.Close()

	// Sets the kind for the new entity.
	kind := "Task"
	// Sets the name/ID for the new entity.
	name := "sampletask1"
	// Creates a Key instance.
	taskKey := datastore.NameKey(kind, name, nil)

	// Creates a Task instance.
	task := Task{
		Description: "Buy milk",
	}

	// Saves the new entity.
	if _, err := client.Put(ctx, taskKey, &task); err != nil {
		log.Fatalf("Failed to save task: %v", err)
	}

	fmt.Printf("Saved %v: %v\n", taskKey, task.Description)
}

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.

// Imports the Google Cloud client library
import com.google.cloud.datastore.Datastore;
import com.google.cloud.datastore.DatastoreOptions;
import com.google.cloud.datastore.Entity;
import com.google.cloud.datastore.Key;

public class QuickstartSample {
  public static void main(String... args) throws Exception {
    // Instantiates a client
    Datastore datastore = DatastoreOptions.getDefaultInstance().getService();

    // The kind for the new entity
    String kind = "Task";
    // The name/ID for the new entity
    String name = "sampletask1";
    // The Cloud Datastore key for the new entity
    Key taskKey = datastore.newKeyFactory().setKind(kind).newKey(name);

    // Prepares the new entity
    Entity task = Entity.newBuilder(taskKey).set("description", "Buy milk").build();

    // Saves the entity
    datastore.put(task);

    System.out.printf("Saved %s: %s%n", task.getKey().getName(), task.getString("description"));

    // Retrieve entity
    Entity retrieved = datastore.get(taskKey);

    System.out.printf("Retrieved %s: %s%n", taskKey.getName(), retrieved.getString("description"));
  }
}

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.

// 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();

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.

# Includes the autoloader for libraries installed with composer
require __DIR__ . '/vendor/autoload.php';

# Imports the Google Cloud client library
use Google\Cloud\Datastore\DatastoreClient;

# Your Google Cloud Platform project ID
$projectId = 'YOUR_PROJECT_ID';

# Instantiates a client
$datastore = new DatastoreClient([
    'projectId' => $projectId
]);

# The kind for the new entity
$kind = 'Task';

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

# The Cloud Datastore key for the new entity
$taskKey = $datastore->key($kind, $name);

# Prepares the new entity
$task = $datastore->entity($taskKey, ['description' => 'Buy milk']);

# Saves the entity
$datastore->upsert($task);

echo 'Saved ' . $task->key() . ': ' . $task['description'] . PHP_EOL;

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.

# Imports the Google Cloud client library
from google.cloud import datastore

# Instantiates a client
datastore_client = datastore.Client()

# The kind for the new entity
kind = "Task"
# The name/ID for the new entity
name = "sampletask1"
# The Cloud Datastore key for the new entity
task_key = datastore_client.key(kind, name)

# Prepares the new entity
task = datastore.Entity(key=task_key)
task["description"] = "Buy milk"

# Saves the entity
datastore_client.put(task)

print(f"Saved {task.key.name}: {task['description']}")

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.

# Imports the Google Cloud client library
require "google/cloud/datastore"

# Instantiate a client
datastore = Google::Cloud::Datastore.new

# The kind for the new entity
kind = "Task"
# The name/ID for the new entity
# task_name = "sampleTask"
# The Cloud Datastore key for the new entity
task_key = datastore.key kind, task_name

# Prepares the new entity
task = datastore.entity task_key do |t|
  t["description"] = "Buy milk"
end

# Saves the entity
datastore.save task

puts "Saved #{task.key.name}: #{task['description']}"
task_key = datastore.find task_key

What's next

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