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composite_index_chained_query.php
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composite_index_chained_query.php
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<?php
/**
* Copyright 2018 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* For instructions on how to run the full sample:
*
* @see https://github.com/GoogleCloudPlatform/php-docs-samples/tree/master/firestore/README.md
*/
namespace Google\Cloud\Samples\Firestore;
use Google\Cloud\Firestore\FirestoreClient;
/**
* Create a composite index chained query, which combines an equality operator with a range comparison. You will need to
* create a custom index. @see https://cloud.google.com/firestore/docs/query-data/indexing.
* ```
* composite_index_chained_query('your-project-id');
* ```
*/
function composite_index_chained_query($projectId)
{
// Create the Cloud Firestore client
$db = new FirestoreClient([
'projectId' => $projectId,
]);
$citiesRef = $db->collection('cities');
# [START fs_composite_index_chained_query]
$chainedQuery = $citiesRef
->where('state', '=', 'CA')
->where('population', '<', 1000000);
# [END fs_composite_index_chained_query]
foreach ($chainedQuery->documents() as $document) {
printf('Document %s returned by query state=CA and population<1000000' . PHP_EOL, $document->id());
}
}