feature symfony#53365 [DoctrineBridge] Allow EntityValueResolver to return a list of entities (HypeMC)

This PR was merged into the 7.1 branch.

Discussion
----------

[DoctrineBridge] Allow `EntityValueResolver` to return a list of entities

| Q             | A
| ------------- | ---
| Branch?       | 7.1
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Issues        | Fix symfony#53236 (sort of)
| License       | MIT

Makes the following possible:
```php
#[Route('/{author_id}', name: 'app_test')]
public function index(
    #[MapEntity(class: Post::class, expr: 'repository.findBy({"author": author_id}, {}, 10)')]
    iterable $posts
): Response {
// ...
}
```

This is actually something that used to be possible with the SensioFrameworkExtraBundle.

Commits
-------

165524c [DoctrineBridge] Allow `EntityValueResolver` to return a list of entities

Author: nicolas-grekas

src/Symfony/Bridge/Doctrine/ArgumentResolver/EntityValueResolver.php

@@ -192,7 +192,7 @@ private function getCriteria(Request $request, MapEntity $options, ObjectManager
         return $criteria;
     }
 
-    private function findViaExpression(ObjectManager $manager, Request $request, MapEntity $options): ?object
+    private function findViaExpression(ObjectManager $manager, Request $request, MapEntity $options): object|iterable|null
     {
         if (!$this->expressionLanguage) {
             throw new \LogicException(sprintf('You cannot use the "%s" if the ExpressionLanguage component is not available. Try running "composer require symfony/expression-language".', __CLASS__));

src/Symfony/Bridge/Doctrine/CHANGELOG.md

@@ -5,6 +5,7 @@ CHANGELOG
 ---
 
  * Deprecate the `DoctrineExtractor::getTypes()` method, use `DoctrineExtractor::getType()` instead
+ * Allow `EntityValueResolver` to return a list of entities
 
 7.0
 ---

src/Symfony/Bridge/Doctrine/Tests/ArgumentResolver/EntityValueResolverTest.php

@@ -298,6 +298,7 @@ public function testExpressionFailureReturns404()
 
         $manager->expects($this->once())
             ->method('getRepository')
+            ->with(\stdClass::class)
             ->willReturn($repository);
 
         $language->expects($this->once())
@@ -329,6 +330,7 @@ public function testExpressionMapsToArgument()
 
         $manager->expects($this->once())
             ->method('getRepository')
+            ->with(\stdClass::class)
             ->willReturn($repository);
 
         $language->expects($this->once())
@@ -343,6 +345,48 @@ public function testExpressionMapsToArgument()
         $this->assertSame([$object], $resolver->resolve($request, $argument));
     }
 
+    public function testExpressionMapsToIterableArgument()
+    {
+        $manager = $this->createMock(ObjectManager::class);
+        $registry = $this->createRegistry($manager);
+        $language = $this->createMock(ExpressionLanguage::class);
+        $resolver = new EntityValueResolver($registry, $language);
+
+        $request = new Request();
+        $request->attributes->set('id', 5);
+        $request->query->set('sort', 'ASC');
+        $request->query->set('limit', 10);
+        $argument = $this->createArgument(
+            'iterable',
+            new MapEntity(
+                class: \stdClass::class,
+                expr: $expr = 'repository.findBy({"author": id}, {"createdAt": request.query.get("sort", "DESC")}, request.query.getInt("limit", 10))',
+            ),
+            'arg1',
+        );
+
+        $repository = $this->createMock(ObjectRepository::class);
+        // find should not be attempted on this repository as a fallback
+        $repository->expects($this->never())
+            ->method('find');
+
+        $manager->expects($this->once())
+            ->method('getRepository')
+            ->with(\stdClass::class)
+            ->willReturn($repository);
+
+        $language->expects($this->once())
+            ->method('evaluate')
+            ->with($expr, [
+                'repository' => $repository,
+                'request' => $request,
+                'id' => 5,
+            ])
+            ->willReturn($objects = [new \stdClass(), new \stdClass()]);
+
+        $this->assertSame([$objects], $resolver->resolve($request, $argument));
+    }
+
     public function testExpressionSyntaxErrorThrowsException()
     {
         $manager = $this->getMockBuilder(ObjectManager::class)->getMock();
@@ -364,6 +408,7 @@ public function testExpressionSyntaxErrorThrowsException()
 
         $manager->expects($this->once())
             ->method('getRepository')
+            ->with(\stdClass::class)
             ->willReturn($repository);
 
         $language->expects($this->once())