List admin index

List indexes within a Datastore project

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.Admin.V1;
using System;
using System.Collections.Generic;

public class ListIndexesSample
{
    public IEnumerable<Google.Cloud.Datastore.Admin.V1.Index> ListIndexes(string projectId = "your-project-id")
    {
        // Create client
        DatastoreAdminClient datastoreAdminClient = DatastoreAdminClient.Create();

        // Initialize request argument(s)
        ListIndexesRequest listIndexesRequest = new ListIndexesRequest
        {
            ProjectId = projectId
        };

        var response = datastoreAdminClient.ListIndexes(listIndexesRequest);

        foreach (var index in response)
        {
            Console.WriteLine($"Index Id: {index.IndexId}");
            Console.WriteLine($"Kind: {index.Kind}");

            Console.WriteLine("Properties:");
            foreach (var property in index.Properties)
            {
                Console.WriteLine($"Property: {property.Name}");
                Console.WriteLine($"Direction: {property.Direction}");
            }
        }

        return response;
    }
}

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"
	"fmt"
	"io"

	admin "cloud.google.com/go/datastore/admin/apiv1"
	"google.golang.org/api/iterator"
	adminpb "google.golang.org/genproto/googleapis/datastore/admin/v1"
)

// indexList lists the indexes.
func indexList(w io.Writer, projectID string) ([]*adminpb.Index, error) {
	// projectID := "my-project-id"
	ctx := context.Background()
	client, err := admin.NewDatastoreAdminClient(ctx)
	if err != nil {
		return nil, fmt.Errorf("admin.NewDatastoreAdminClient: %w", err)
	}
	defer client.Close()

	req := &adminpb.ListIndexesRequest{
		ProjectId: projectID,
	}
	it := client.ListIndexes(ctx, req)
	var indices []*adminpb.Index
	for {
		index, err := it.Next()
		if err == iterator.Done {
			break
		}
		if err != nil {
			return nil, fmt.Errorf("ListIndexes: %w", err)
		}
		indices = append(indices, index)
		fmt.Fprintf(w, "Got index: %v\n", index.IndexId)
	}

	fmt.Fprintf(w, "Got lists of indexes\n")
	return indices, nil
}

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.

const {Datastore} = require('@google-cloud/datastore');
const datastore = new Datastore();

async function listIndexes() {
  const [indexes] = await datastore.getIndexes();

  console.log(`${indexes.length} indexes returned.`);

  // Each returned Index object includes metadata about the index.
  const [firstIndex] = indexes;
  console.log('Properties:', firstIndex.metadata.properties);

  // You may also get Index references as a readable object stream.
  datastore
    .getIndexesStream()
    .on('data', index => {
      console.log('Properties:', index.metadata.properties);
    })
    .on('end', () => {
      // All matching Index objects have been returned.
    });
}

listIndexes();

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.

def list_indexes(project_id):
    """Lists the indexes."""
    # project_id := "my-project-id"
    client = DatastoreAdminClient()

    indexes = []
    for index in client.list_indexes({"project_id": project_id}):
        indexes.append(index)
        print("Got index: %v\n", index.index_id)

    print("Got list of indexes\n")
    return indexes

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.

# project_id = "project-id"
indexes = client.list_indexes(project_id: project_id).map do |index|
  puts "Got index: #{index.index_id}"
  index
end

puts "Got list of indexes"

What's next

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