/**
* Creates a query object for pulling the last $limit number of
* "PubSubMessage" items, equivalent to the following GQL:
*
* SELECT * from DatastoreComment ORDER BY created DESC LIMIT 20
*
* @see https://cloud.google.com/datastore/docs/concepts/gql
*/
public function createSimpleQuery($limit = 20)
{
$request = new \Google_Service_Datastore_RunQueryRequest();
$query = new \Google_Service_Datastore_Query();
$order = new \Google_Service_Datastore_PropertyOrder();
$order->setDirection('descending');
$property = new \Google_Service_Datastore_PropertyReference();
$property->setName('created');
$order->setProperty($property);
$query->setOrder([$order]);
$kind = new \Google_Service_Datastore_KindExpression();
$kind->setName(self::KIND);
$query->setKinds([$kind]);
$query->setLimit($limit);
$request->setQuery($query);
return $request;
}
/**
* @return \Google_Service_Datastore_Query
*/
public function build()
{
$query = new \Google_Service_Datastore_Query();
if (!empty($this->projections)) {
$query->setProjection($this->projections);
}
if (!empty($this->kinds)) {
$query->setKinds($this->kinds);
}
if (!is_null($this->filter)) {
$query->setFilter($this->filter);
}
if (!empty($this->orders)) {
$query->setOrder($this->orders);
}
if (!empty($this->groupBys)) {
$query->setGroupBy($this->groupBys);
}
if (!is_null($this->startCursor)) {
$query->setStartCursor($this->startCursor);
}
if (!is_null($this->endCursor)) {
$query->setEndCursor($this->endCursor);
}
if (!is_null($this->offset)) {
$query->setOffset($this->offset);
}
if (!is_null($this->limit)) {
$query->setLimit($this->limit);
}
return $query;
}
public function listBooks($limit = 10, $cursor = null)
{
$query = new \Google_Service_Datastore_Query();
$query->setKinds(['Book']);
$query->setOrder('title');
$query->setLimit($limit);
$query->setStartCursor($cursor);
$request = new \Google_Service_Datastore_RunQueryRequest();
$request->setQuery($query);
$response = $this->datastore->datasets->runQuery($this->datasetId, $request);
/** @var \Google_Service_Datastore_QueryResultBatch $batch */
$batch = $response->getBatch();
return array('books' => $response, 'next_page_token' => $batch->getEndCursor());
}
/**
* Create a query object for the given Kind.
*/
protected static function createQuery($kind_name)
{
$query = new Google_Service_Datastore_Query();
$kind = new Google_Service_Datastore_KindExpression();
$kind->setName($kind_name);
$query->setKinds([$kind]);
return $query;
}