feature #733 [AI Bundle][Postgres] Add store config (Jarosław Lach)

This PR was squashed before being merged into the main branch.

Discussion
----------

[AI Bundle][Postgres] Add store config

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Docs?         | no
| License       | MIT

Added postgresql configuration for ai-bundle with.
Configuration requires DSN for PDO instantiation with optional username and password,
table name, vector field name or/and distance function

Commits
-------

346d352 [AI Bundle][Postgres] Add store config

Author: OskarStark

src/ai-bundle/config/options.php

@@ -668,6 +668,21 @@
                             ->end()
                         ->end()
                     ->end()
+                    ->arrayNode('postgres')
+                        ->useAttributeAsKey('name')
+                        ->arrayPrototype()
+                            ->children()
+                                ->stringNode('dsn')->cannotBeEmpty()->end()
+                                ->stringNode('username')->end()
+                                ->stringNode('password')->end()
+                                ->stringNode('table_name')->isRequired()->end()
+                                ->stringNode('vector_field')->end()
+                                ->enumNode('distance')
+                                    ->values(['cosine', 'inner_product', 'l1', 'l2'])
+                                ->end()
+                            ->end()
+                        ->end()
+                    ->end()
                 ->end()
             ->end()
             ->arrayNode('vectorizer')

src/ai-bundle/src/AiBundle.php

@@ -68,6 +68,7 @@
 use Symfony\AI\Store\Bridge\MongoDb\Store as MongoDbStore;
 use Symfony\AI\Store\Bridge\Neo4j\Store as Neo4jStore;
 use Symfony\AI\Store\Bridge\Pinecone\Store as PineconeStore;
+use Symfony\AI\Store\Bridge\Postgres\Store;
 use Symfony\AI\Store\Bridge\Qdrant\Store as QdrantStore;
 use Symfony\AI\Store\Bridge\Redis\Store as RedisStore;
 use Symfony\AI\Store\Bridge\SurrealDb\Store as SurrealDbStore;
@@ -1189,6 +1190,39 @@ private function processStoreConfig(string $type, array $stores, ContainerBuilde
                 $container->registerAliasForArgument('ai.store.'.$type.'.'.$name, StoreInterface::class, $type.'_'.$name);
             }
         }
+
+        if ('postgres' === $type) {
+            foreach ($stores as $name => $store) {
+                $pdo = new Definition(\PDO::class);
+                $pdo->setArguments([
+                    $store['dsn'],
+                    $store['username'] ?? null,
+                    $store['password'] ?? null],
+                );
+
+                $arguments = [
+                    $pdo,
+                    $store['table_name'],
+                ];
+
+                if (\array_key_exists('vector_field', $store)) {
+                    $arguments[2] = $store['vector_field'];
+                }
+
+                if (\array_key_exists('distance', $store)) {
+                    $arguments[3] = $store['distance'];
+                }
+
+                $definition = new Definition(Store::class);
+                $definition
+                    ->addTag('ai.store')
+                    ->setArguments($arguments);
+
+                $container->setDefinition('ai.store.'.$type.'.'.$name, $definition);
+                $container->registerAliasForArgument('ai.store.'.$type.'.'.$name, StoreInterface::class, $name);
+                $container->registerAliasForArgument('ai.store.'.$type.'.'.$name, StoreInterface::class, $type.'_'.$name);
+            }
+        }
     }
 
     /**

src/ai-bundle/tests/DependencyInjection/AiBundleTest.php

@@ -2894,6 +2894,15 @@ private function getFullConfig(): array
                             'collection' => 'my_weaviate_collection',
                         ],
                     ],
+                    'postgres' => [
+                        'my_postgres_store' => [
+                            'dsn' => 'pgsql:host=127.0.0.1;port=5432;dbname=postgresql_db',
+                            'username' => 'postgres',
+                            'password' => 'pass',
+                            'table_name' => 'my_table',
+                            'vector_field' => 'my_embedding',
+                        ],
+                    ],
                 ],
                 'vectorizer' => [
                     'test_vectorizer' => [