Add Elasticsearch 7 client in Elasticsearch 8 compatibility mode

Author: alexander-schranz

.github/workflows/test-application.yaml

@@ -64,6 +64,22 @@ jobs:
                     - php-version: '8.1'
                       elasticsearch-version: '7.11.1'
                       elasticsearch-package-constraint: '~7.11.0'
+                      minimum-stability: 'stable'
+                      dependency-versions: 'highest'
+                      tools: 'composer:v2'
+                      php-cs-fixer: false
+
+                    - php-version: '8.2'
+                      elasticsearch-version: '8.7.0'
+                      elasticsearch-package-constraint: '~7.11.0'
+                      minimum-stability: 'stable'
+                      dependency-versions: 'highest'
+                      tools: 'composer:v2'
+                      php-cs-fixer: false
+
+                    - php-version: '8.2'
+                      elasticsearch-version: '8.7.0'
+                      elasticsearch-package-constraint: '~7.11.0'
                       minimum-stability: 'dev'
                       dependency-versions: 'highest'
                       tools: 'composer:v2'
@@ -117,5 +133,4 @@ jobs:
               run: vendor/bin/behat --suite=zend_lucene
 
             - name: Execute elastic behat tests
-              if: ${{ matrix.php-version < '8.0' }} # requires fixing elastic tests on 7.11 (sorting)
               run: vendor/bin/behat --suite=elastic

Search/Adapter/ElasticSearchAdapter.php

@@ -78,6 +78,17 @@ public function __construct(Factory $factory, ElasticSearchClient $client, $vers
         $this->factory = $factory;
         $this->client = $client;
         $this->version = $version;
+
+        if (\version_compare($this->version, '7.11.0', '>=')) {
+            $client->setConnectionParams([
+                'client' => [
+                    'headers' => [
+                        'Accept' => ['application/vnd.elasticsearch+json;compatible-with=7'],
+                        'Content-Type' => ['application/vnd.elasticsearch+json;compatible-with=7'],
+                    ],
+                ],
+            ]);
+        }
     }
 
     public function index(Document $document, $indexName)

Search/ObjectToDocumentConverter.php

@@ -181,7 +181,7 @@ private function populateDocument(
             $type = $mapping['type'];
             /** @var FieldInterface $mappingField */
             $mappingField = $mapping['field'];
-            $condition = method_exists($mappingField, 'getCondition') ? $mappingField->getCondition() : null;
+            $condition = \method_exists($mappingField, 'getCondition') ? $mappingField->getCondition() : null;
             $validField = $condition ? $this->fieldEvaluator->evaluateCondition($object, $condition) : true;
 
             if (false === $validField) {