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Showing content from https://cloud.google.com/nodejs/docs/reference/datastore/6.4.8/datastore/datastore.html below:

Class Datastore | Node.js client library

Idiomatic class for interacting with Cloud Datastore. Uses the lower-level class under the hood.

In addition to the constructor options shown here, the Datastore class constructor accepts the same options accepted by .

Make sure you have the gcloud SDK installed, then run:

 $ gcloud beta emulators datastore start --no-legacy 

You will see the following printed:

 \[datastore\] API endpoint: http://localhost:8005 \[datastore\] If you are using a library that supports the DATASTORE\_EMULATOR\_HOST environment variable, run: \[datastore\] \[datastore\] export DATASTORE\_EMULATOR\_HOST=localhost:8005 \[datastore\] \[datastore\] Dev App Server is now running. 

Set that environment variable and your localhost Datastore will automatically be used. You can also pass this address in manually with apiEndpoint.

Additionally, DATASTORE_PROJECT_ID is recognized. If you have this set, you don't need to provide a projectId.

{DatastoreRequest}

[Cloud Datastore Concepts Overview]https://cloud.google.com/datastore/docs/concepts/overview

constructor(options?: DatastoreOptions);

Constructs a new instance of the Datastore class

clients_: Map<string, ClientStub>;

customEndpoint_?: boolean;

DatastoreRequest: typeof DatastoreRequest;

DatastoreRequest class.

Datastore.DatastoreRequest DatastoreRequest {constructor}

KEY: typeof entity.KEY_SYMBOL;

static KEY: typeof entity.KEY_SYMBOL;

Access the Key from an Entity object.

Datastore#KEY {symbol}

MORE_RESULTS_AFTER_CURSOR: string;

static MORE_RESULTS_AFTER_CURSOR: string;

This is one of three values which may be returned from , , and as info.moreResults.

There *may* be more results after the specified end cursor.

{string}

MORE_RESULTS_AFTER_LIMIT: string;

static MORE_RESULTS_AFTER_LIMIT: string;

This is one of three values which may be returned from , , and as info.moreResults.

There *may* be more results after the specified limit.

{string}

static NO_MORE_RESULTS: string;

This is one of three values which may be returned from , , and as info.moreResults.

There are no more results left to query for.

{string}

options: DatastoreOptions;

Query class.

Datastore.Query Query {constructor}

Transaction: typeof Transaction;

Transaction class.

Datastore.Transaction Transaction {constructor}

createQuery(kind?: string): Query;

createQuery(kind?: string[]): Query;

createQuery(namespace: string, kind: string): Query;

createQuery(namespace: string, kind: string[]): Query;

determineBaseUrl_(customApiEndpoint?: string): void;

Determine the appropriate endpoint to use for API requests. If not explicitly defined, check for the "DATASTORE_EMULATOR_HOST" environment variable, used to connect to a local Datastore server.

Custom API endpoint.

double(value: number): entity.Double;

static double(value: number): entity.Double;

Helper function to get a Datastore Double object.

The double value.

{object}

export(config: ExportEntitiesConfig): Promise<LongRunningResponse>;

export(config: ExportEntitiesConfig, callback: LongRunningCallback): void;

geoPoint(coordinates: entity.Coordinates): entity.GeoPoint;

static geoPoint(coordinates: entity.Coordinates): entity.GeoPoint;

Helper function to get a Datastore Geo Point object.

Coordinate value.

{object}

getIndexes(options?: GetIndexesOptions): Promise<GetIndexesResponse>;

getIndexes(options: GetIndexesOptions, callback: GetIndexesCallback): void;

getIndexes(callback: GetIndexesCallback): void;

getIndexesStream(options?: GetIndexesOptions): NodeJS.ReadableStream;

Get all of the indexes in this project as a readable object stream.

Configuration object. See for a complete list of options.

{ReadableStream

getProjectId(): Promise<string>;

import(config: ImportEntitiesConfig): Promise<LongRunningResponse>;

import(config: ImportEntitiesConfig, callback: LongRunningCallback): void;

index(id: string): Index;

Get a reference to an Index.

The index name or id.

{Index}

insert(entities: Entities): Promise<InsertResponse>;

insert(entities: Entities, callback: InsertCallback): void;

int(value: number | string): entity.Int;

static int(value: number | string): entity.Int;

Helper function to get a Datastore Integer object.

This is also useful when using an ID outside the bounds of a JavaScript Number object.

The integer value.

{object}

isDouble(value?: {}): boolean;

static isDouble(value?: {}): boolean;

Helper function to check if something is a Datastore Double object.

{boolean}

isGeoPoint(value?: {}): boolean;

static isGeoPoint(value?: {}): boolean;

Helper function to check if something is a Datastore Geo Point object.

{boolean}

isInt(value?: {}): boolean;

static isInt(value?: {}): boolean;

Helper function to check if something is a Datastore Integer object.

{boolean}

isKey(value?: {}): boolean;

static isKey(value?: {}): boolean;

Helper function to check if something is a Datastore Key object.

{boolean}

key(options: entity.KeyOptions): entity.Key;

key(path: PathType[]): entity.Key;

key(path: string): entity.Key;

keyFromLegacyUrlsafe(key: string): entity.Key;

Helper to convert URL safe key string to entity key object

This is intended to work with the "legacy" representation of a datastore "Key" used within Google App Engine (a so-called "Reference").

Entity key object.

{string} Created urlsafe key.

keyToLegacyUrlSafe(key: entity.Key, locationPrefix?: string): Promise<string>;

keyToLegacyUrlSafe(key: entity.Key, callback: KeyToLegacyUrlSafeCallback): void;

keyToLegacyUrlSafe(key: entity.Key, locationPrefix: string, callback: KeyToLegacyUrlSafeCallback): void;

save(entities: Entities, gaxOptions?: CallOptions): Promise<SaveResponse>;

save(entities: Entities, gaxOptions: CallOptions, callback: SaveCallback): void;

save(entities: Entities, callback: SaveCallback): void;

transaction(options?: TransactionOptions): Transaction;

Create a new Transaction object.

{Transaction}

update(entities: Entities): Promise<UpdateResponse>;

update(entities: Entities, callback: UpdateCallback): void;

upsert(entities: Entities): Promise<UpsertResponse>;

upsert(entities: Entities, callback: UpsertCallback): void;

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