GAE PHP Datastore Query - php

Question

For a project I am using Google App Engine's Datastore with PHP, which does not have official documentation.
I used the following guide to successfully be able to add new entities to the datastore, but now I am struggling to get queries working so that I can retrieve data and display it on my web page.
https://gae-php-tips.appspot.com/2013/12/23/getting-started-with-the-cloud-datastore-on-php-app-engine/
Here is my current code:
try {
// test the config and connectivity by creating a test entity, building
// a commit request for that entity, and creating/updating it in the datastore
// $req = createRequest();
// $service_dataset->commit($dataset_id, $req, []);
$req = createQuery();
// printQueryResults($req);
}
catch (Google_Exception $ex) {
syslog(LOG_WARNING, 'Commit to Cloud Datastore exception: ' . $ex->getMessage());
echo "There was an issue -- check the logs.";
return;
}
function createQuery()
{
$gql_query = new Google_Service_Datastore_GqlQuery();
$gql_query->setQueryString("SELECT * FROM 'Notes' WHERE name = 'test1'");
$gql_query->setAllowLiteral(true);
$req = new Google_Service_Datastore_RunQueryRequest();
$req->setGqlQuery($gql_query);
return $req;
}
I want to be able to query my datastore and get all the entities that have a matching name.

Answer 1

I tested successfully this following code adapted, i assume that you are using DatastoreService.php from the guide you mentioned. There must be different ways to parse the query result but here is one ;)
config.php : replace with your credentials
<?php
$google_api_config = [
'application-id' => 'xxxxxxxxxxxxxxx',
'service-account-name' => 'xxxxx#developer.gserviceaccount.com',
'private-key' => file_get_contents('xxxxxxx.p12'),
'dataset-id' => 'xxxxxxxxxxxx'
];
your code adapted
require_once 'config.php';
require_once 'DatastoreService.php';
try {
$req = createQuery();
}
catch (Google_Exception $ex) {
syslog(LOG_WARNING, 'Commit to Cloud Datastore exception: ' . $ex->getMessage());
echo "There was an issue -- check the logs.";
return;
}
// from config.php
$options = $google_api_config;
$datastoreService = new DatastoreService($options);
$result = $datastoreService->runQuery($req, $optParams = []);
$results = $result->getBatch()->getEntityResults();
$items = array();
foreach ($results as $item) {
$item = $item->getEntity()->getProperties();
$items[] = $item['name']['stringValue'];
}
echo '<plaintext>' . print_r($items, true);
function createQuery()
{
$gql_query = new Google_Service_Datastore_GqlQuery();
$gql_query->setQueryString($query = "SELECT * FROM Notes WHERE name = 'test1'");
$gql_query->setAllowLiteral(true);
$req = new Google_Service_Datastore_RunQueryRequest();
$req->setGqlQuery($gql_query);
return $req;
}

Answer 2

Include google/cloud-datastore library via composer as below.
$ composer require google/cloud-datastore
and you can use Query mothod as Example below.
<?php
require 'vendor/autoload.php';
use Google\Cloud\Datastore\DatastoreClient;
$datastore = new DatastoreClient([
'projectId' => 'my_project'
]);
$query = $datastore->query();
$query->kind('Notes');
$query->filter('name ', '=', 'test1');
$res = $datastore->runQuery($query);
foreach ($res as $notes) {
echo $notes['name']; // test1
}
Or it can be build using query object
<?php
$query = $datastore->query([
'query' => [
'kind' => [
[
'name' => 'Notes'
]
],
'filter' => [
'propertyFilter' => [
'op' => 'EQUAL',
'property' => [
'name' => 'name'
],
'value' => [
'stringValue' => 'test1'
]
]
]
]
]);