Cloud Datastore Client - Class Operation (1.19.0)

Reference documentation and code samples for the Cloud Datastore Client class Operation.

Run lookups and queries and commit changes.

This class is used by Google\Cloud\Datastore\Google\Cloud\Datastore\DatastoreClient and Google\Cloud\Datastore\Google\Cloud\Datastore\Transaction and is not intended to be used directly.

Examples are omitted for brevity. Detailed usage examples can be found in Google\Cloud\Datastore\Google\Cloud\Datastore\DatastoreClient and Google\Cloud\Datastore\Google\Cloud\Datastore\Transaction.

Methods

__construct

Create an operation

Parameters
Name	Description
`connection`	`Google\Cloud\Datastore\Connection\ConnectionInterface` A connection to Google Cloud Platform's Datastore API.
`projectId`	`string` The Google Cloud Platform project ID.
`namespaceId`	`string` The namespace to use for all service requests.
`entityMapper`	`Google\Cloud\Datastore\EntityMapper` A Datastore Entity Mapper instance.
`databaseId`	`string` ID of the database to which the entities belong.

key

Create a single Key instance

Parameters
Name	Description
`kind`	`string` The kind.
`identifier`	`string\|int` [optional] The ID or name.
`options`	`array` Configuration Options
`↳ identifierType`	`string` If omitted, type will be determined internally. In cases where any ambiguity can be expected (i.e. if you want to create keys with `name` but your values may pass PHP's `is_numeric()` check), this value may be explicitly set using `Key::TYPE_ID` or `Key::TYPE_NAME`.
`↳ databaseId`	`string` ID of the database to which the entities belong.

Returns
Type	Description
`Google\Cloud\Datastore\Key`

keys

Create multiple keys with the same configuration.

When inserting multiple entities, creating a set of keys at once can be useful. By defining the Key's kind and any ancestors up front, and allowing Cloud Datastore to allocate IDs, you can be sure that your entity identity and ancestry are correct and that there will be no collisions during the insert operation.

Parameters
Name	Description
`kind`	`string` The kind to use in the final path element.
`options`	`array` Configuration Options
`↳ ancestors`	`array[]` An array of PathElement arrays. Use to create ancestor paths.
`↳ number`	`int` The number of keys to generate.
`↳ id`	`string\|int` The ID for the last pathElement.
`↳ name`	`string` The Name for the last pathElement.

Returns
Type	Description
`array<Google\Cloud\Datastore\Key>`

entity

Create an entity

This method does not execute any service requests.

Entities are created with a Datastore Key, or by specifying a Kind. Kinds are only allowed for insert operations. For any other case, you must specify a named key. If a kind is given, an ID will be automatically allocated for the entity upon insert. Additionally, if your entity requires a complex key elementPath, you must create the key separately.

In certain cases, you may want to create your own entity types. Google Cloud PHP supports custom types implementing Google\Cloud\Datastore\Google\Cloud\Datastore\EntityInterface. If the name of an EntityInterface implementation is given in the options array, an instance of that class will be returned instead of Google\Cloud\Datastore\Google\Cloud\Datastore\Entity.

Parameters
Name	Description
`key`	`Google\Cloud\Datastore\Key\|string\|null` [optional] The key used to identify the record, or a string $kind. The key may be null only if the entity will be used as an embedded entity within another entity. Attempting to use keyless entities as root entities will result in error.
`entity`	`array` [optional] The data to fill the entity with.
`options`	`array` Configuration Options
`↳ className`	`string` If set, the given class will be returned. Value must be the name of a class implementing Google\Cloud\Datastore\Google\Cloud\Datastore\EntityInterface. Defaults to Google\Cloud\Datastore\Google\Cloud\Datastore\Entity.
`↳ excludeFromIndexes`	`array` A list of entity keys to exclude from datastore indexes.

Returns
Type	Description
`Google\Cloud\Datastore\EntityInterface`

beginTransaction

Begin a Datastore Transaction.

Parameters
Name	Description
`transactionOptions`	`array` Transaction Options
`options`	`array` Configuration options.

Returns
Type	Description
`string`

allocateIds

Allocate available IDs to a set of keys

Keys MUST be in an incomplete state (i.e. including a kind but not an ID or name in their final pathElement).

This method will execute a service request.

Parameters
Name	Description
`keys`	`array<Google\Cloud\Datastore\Key>` The incomplete keys.
`options`	`array` [optional] Configuration Options.

Returns
Type	Description
`array<Google\Cloud\Datastore\Key>`

lookup

Lookup records by key

Parameters
Name	Description
`keys`	`array<Google\Cloud\Datastore\Key>` The identifiers to look up.
`options`	`array` Configuration Options
`↳ readConsistency`	`string` See ReadConsistency.
`↳ transaction`	`string` The transaction ID, if the query should be run in a transaction.
`↳ className`	`string\|array` If a string, the given class will be returned. Value must be the name of a class implementing Google\Cloud\Datastore\Google\Cloud\Datastore\EntityInterface. If an array is given, it must be an associative array, where the key is a Kind and the value must implement Google\Cloud\Datastore\Google\Cloud\Datastore\EntityInterface. Defaults to Google\Cloud\Datastore\Google\Cloud\Datastore\Entity.
`↳ sort`	`bool` If set to true, results in each set will be sorted to match the order given in $keys. Defaults to `false`.
`↳ databaseId`	`string` ID of the database to which the entities belong.
`↳ readTime`	`Timestamp` Reads entities as they were at the given timestamp.

Returns
Type	Description
`array`	Returns an array with keys [`found`, `missing`, and `deferred`]. Members of `found` will be instance of {@see \Google\Cloud\Datastore\Google\Cloud\Datastore\Entity}. Members of `missing` and `deferred` will be instance of {@see \Google\Cloud\Datastore\Google\Cloud\Datastore\Key}.

runQuery

Run a query and return entities

Parameters
Name	Description
`query`	`Google\Cloud\Datastore\Query\QueryInterface` The query object.
`options`	`array` Configuration Options
`↳ transaction`	`string` The transaction ID, if the query should be run in a transaction.
`↳ className`	`string` If set, the given class will be returned. Value must be the name of a class implementing Google\Cloud\Datastore\Google\Cloud\Datastore\EntityInterface. Defaults to Google\Cloud\Datastore\Google\Cloud\Datastore\Entity.
`↳ readConsistency`	`string` See ReadConsistency.
`↳ databaseId`	`string` ID of the database to which the entities belong.
`↳ readTime`	`Timestamp` Reads entities as they were at the given timestamp.

Returns
Type	Description
`Google\Cloud\Datastore\EntityIterator<\google\cloud\datastore\entityinterface>`

commit

Commit all mutations

Calling this method will end the operation (and close the transaction, if one is specified).

Parameters
Name	Description
`mutations`	`array` Mutation[].
`options`	`array` Configuration Options
`↳ transaction`	`string` The transaction ID, if the query should be run in a transaction.
`↳ databaseId`	`string` ID of the database to which the entities belong.

Returns
Type	Description
`array`	[Response Body](https://cloud.google.com/datastore/reference/rest/v1/projects/commit#response-body)

allocateIdsToEntities

Patch any incomplete keys in the given array of entities

Any incomplete keys will be allocated an ID. Named keys in the input will remain unchanged.

Parameter
Name	Description
`entities`	`array<Google\Cloud\Datastore\EntityInterface>` A list of entities

Returns
Type	Description
`array<Google\Cloud\Datastore\EntityInterface>`

mutation

Enqueue a mutation

A mutation is a change to the datastore. Create, Update and Delete are examples of mutations, while Read is not.

Google Cloud Datastore supports multiple mutations in a single API call, subject to the limits of the service. Adding mutations separately from committing the changes allows you to create complex operations, both inside a transaction and not.

Parameters
Name	Description
`operation`	`string` The operation to execute. "Insert", "Upsert", "Update" or "Delete".
`input`	`Google\Cloud\Datastore\EntityInterface\|Google\Cloud\Datastore\Key` The entity or key to mutate.
`type`	`string` The type of the input array.
`baseVersion`	`string` [optional] The version of the entity that this mutation is being applied to. If this does not match the current version on the server, the mutation conflicts.

Returns
Type	Description
`array`	[Mutation](https://cloud.google.com/datastore/docs/reference/rest/v1/projects/commit#Mutation).

rollback

Roll back a transaction

Parameter
Name	Description
`transactionId`	`string` The transaction to roll back

Returns
Type	Description
`void`

checkOverwrite

Check whether an update or upsert operation may proceed safely

Parameters
Name	Description
`entities`	`array<Google\Cloud\Datastore\EntityInterface>` the entities to be updated or upserted.
`allowOverwrite`	`bool` If `true`, entities may be overwritten. Defaults to `false`.

Returns
Type	Description
`void`