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Showing content from https://cloud.google.com/nodejs/docs/reference/datastore/6.5.0/datastore/datastore.html below:

Class Datastore | Node.js client library

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

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

The Datastore Emulator

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.

See Cloud Datastore Concepts Overview

InheritanceDatastoreRequest > Datastore

Package@google-cloud/datastore Constructors (constructor)(options)

constructor(options?: DatastoreOptions);

Constructs a new instance of the Datastore class

Parameter Properties auth Property Value Type Description GoogleAuth baseUrl_ Property Value clients_

clients_: Map<string, ClientStub>;

Property Value Type Description Map<string, ClientStub> customEndpoint_

customEndpoint_?: boolean;

Property Value DatastoreRequest

DatastoreRequest: typeof DatastoreRequest;

DatastoreRequest class.

Datastore.DatastoreRequest DatastoreRequest {constructor}

Property Value Type Description typeof DatastoreRequest defaultBaseUrl_ Property Value KEY

KEY: typeof entity.KEY_SYMBOL;

Property Value Type Description typeof entity.KEY_SYMBOL KEY

static KEY: typeof entity.KEY_SYMBOL;

Access the Key from an Entity object.

Datastore#KEY {symbol}

Property Value Type Description typeof entity.KEY_SYMBOL MORE_RESULTS_AFTER_CURSOR

MORE_RESULTS_AFTER_CURSOR: string;

Property Value MORE_RESULTS_AFTER_CURSOR

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}

Property Value MORE_RESULTS_AFTER_LIMIT

MORE_RESULTS_AFTER_LIMIT: string;

Property Value MORE_RESULTS_AFTER_LIMIT

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}

Property Value namespace Property Value NO_MORE_RESULTS Property Value NO_MORE_RESULTS

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}

Property Value options

options: DatastoreOptions;

Property Value port_ Property Value Query

Query class.

Datastore.Query Query {constructor}

Property Value Type Description typeof Query Transaction

Transaction: typeof Transaction;

Transaction class.

Datastore.Transaction Transaction {constructor}

Property Value Type Description typeof Transaction Methods createQuery(kind)

createQuery(kind?: string): Query;

Parameter Name Description kind string
Returns createQuery(kind)

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

Parameter Name Description kind string[]
Returns createQuery(namespace, kind)

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

Parameters Name Description namespace string
kind string
Returns createQuery(namespace, kind)

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

Parameters Name Description namespace string
kind string[]
Returns determineBaseUrl_(customApiEndpoint)

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.

Parameter Name Description customApiEndpoint string

Custom API endpoint.

Returns double(value)

double(value: number): entity.Double;

Parameter Name Description value number
Returns Type Description entity.Double double(value)

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

Helper function to get a Datastore Double object.

Parameter Name Description value number

The double value.

Returns Type Description entity.Double

{object}

export(config)

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

Parameter Returns export(config, callback)

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

Parameters Returns geoPoint(coordinates)

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

Parameter Name Description coordinates entity.Coordinates
Returns Type Description entity.GeoPoint geoPoint(coordinates)

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

Helper function to get a Datastore Geo Point object.

Parameter Name Description coordinates entity.Coordinates

Coordinate value.

Returns Type Description entity.GeoPoint

{object}

getIndexes(options)

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

Parameter Name Description options GetIndexesOptions
Returns Type Description Promise<GetIndexesResponse> getIndexes(options, callback)

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

Parameters Name Description options GetIndexesOptions
callback GetIndexesCallback
Returns getIndexes(callback)

getIndexes(callback: GetIndexesCallback): void;

Parameter Name Description callback GetIndexesCallback
Returns getIndexesStream(options)

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

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

Parameter Name Description options GetIndexesOptions

Configuration object. See for a complete list of options.

Returns Type Description NodeJS.ReadableStream

{ReadableStream

getProjectId()

getProjectId(): Promise<string>;

Returns Type Description Promise<string> import(config)

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

Parameter Returns import(config, callback)

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

Parameters Returns index(id)

index(id: string): Index;

Get a reference to an Index.

Parameter Name Description id string

The index name or id.

Returns Type Description Index

{Index}

insert(entities)

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

Parameter Name Description entities Entities
Returns insert(entities, callback)

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

Parameters Returns int(value)

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

Parameter Name Description value number | string
Returns Type Description entity.Int int(value)

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.

Parameter Name Description value number | string

The integer value.

Returns Type Description entity.Int

{object}

isDouble(value)

isDouble(value?: {}): boolean;

Parameter Name Description value {}
Returns isDouble(value)

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

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

Parameter Name Description value {}
Returns Type Description boolean

{boolean}

isGeoPoint(value)

isGeoPoint(value?: {}): boolean;

Parameter Name Description value {}
Returns isGeoPoint(value)

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

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

Parameter Name Description value {}
Returns Type Description boolean

{boolean}

isInt(value)

isInt(value?: {}): boolean;

Parameter Name Description value {}
Returns isInt(value)

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

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

Parameter Name Description value {}
Returns Type Description boolean

{boolean}

isKey(value)

isKey(value?: {}): boolean;

Parameter Name Description value {}
Returns isKey(value)

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

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

Parameter Name Description value {}
Returns Type Description boolean

{boolean}

key(options)

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

Parameter Name Description options KeyOptions
Returns Type Description entity.Key key(path)

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

Parameter Returns Type Description entity.Key key(path)

key(path: string): entity.Key;

Parameter Name Description path string
Returns Type Description entity.Key keyFromLegacyUrlsafe(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").

Parameter Name Description key string

Entity key object.

Returns Type Description entity.Key

{string} Created urlsafe key.

keyToLegacyUrlSafe(key, locationPrefix)

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

Parameters Name Description key entity.Key
locationPrefix string
Returns Type Description Promise<string> keyToLegacyUrlSafe(key, callback)

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

Parameters Returns keyToLegacyUrlSafe(key, locationPrefix, callback)

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

Parameters Returns save(entities, gaxOptions)

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

Parameters Name Description entities Entities
gaxOptions CallOptions
Returns Type Description Promise<SaveResponse> save(entities, gaxOptions, callback)

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

Parameters Name Description entities Entities
gaxOptions CallOptions
callback SaveCallback
Returns save(entities, callback)

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

Parameters Name Description entities Entities
callback SaveCallback
Returns transaction(options)

transaction(options?: TransactionOptions): Transaction;

Create a new Transaction object.

Parameter Returns Type Description Transaction

{Transaction}

update(entities)

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

Parameter Name Description entities Entities
Returns update(entities, callback)

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

Parameters Returns upsert(entities)

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

Parameter Name Description entities Entities
Returns upsert(entities, callback)

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

Parameters Returns

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