From 9007911a8594ff6c77e82c877667017b2d797094 Mon Sep 17 00:00:00 2001
From: Valentin <udaltsov.valentin@gmail.com>
Date: Thu, 27 Dec 2018 02:35:06 +0300
Subject: [PATCH] Do not ignore the choice groups for caching

---
 .../Factory/CachingFactoryDecorator.php       | 31 +------------------
 .../Factory/CachingFactoryDecoratorTest.php   | 17 ++++++----
 2 files changed, 12 insertions(+), 36 deletions(-)

diff --git a/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php b/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
index dba025bc6487..ece33ad65c5c 100644
--- a/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
+++ b/src/Symfony/Component/Form/ChoiceList/Factory/CachingFactoryDecorator.php
@@ -62,30 +62,6 @@ public static function generateHash($value, $namespace = '')
         return hash('sha256', $namespace.':'.serialize($value));
     }
 
-    /**
-     * Flattens an array into the given output variable.
-     *
-     * @param array $array  The array to flatten
-     * @param array $output The flattened output
-     *
-     * @internal
-     */
-    private static function flatten(array $array, &$output)
-    {
-        if (null === $output) {
-            $output = array();
-        }
-
-        foreach ($array as $key => $value) {
-            if (\is_array($value)) {
-                self::flatten($value, $output);
-                continue;
-            }
-
-            $output[$key] = $value;
-        }
-    }
-
     public function __construct(ChoiceListFactoryInterface $decoratedFactory)
     {
         $this->decoratedFactory = $decoratedFactory;
@@ -113,12 +89,7 @@ public function createListFromChoices($choices, $value = null)
         // The value is not validated on purpose. The decorated factory may
         // decide which values to accept and which not.
 
-        // We ignore the choice groups for caching. If two choice lists are
-        // requested with the same choices, but a different grouping, the same
-        // choice list is returned.
-        self::flatten($choices, $flatChoices);
-
-        $hash = self::generateHash(array($flatChoices, $value), 'fromChoices');
+        $hash = self::generateHash(array($choices, $value), 'fromChoices');
 
         if (!isset($this->lists[$hash])) {
             $this->lists[$hash] = $this->decoratedFactory->createListFromChoices($choices, $value);
diff --git a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
index dd6c968bd84b..c0d34c1bfd51 100644
--- a/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
+++ b/src/Symfony/Component/Form/Tests/ChoiceList/Factory/CachingFactoryDecoratorTest.php
@@ -64,19 +64,24 @@ public function testCreateFromChoicesComparesTraversableChoicesAsArray()
         $this->assertSame($list, $this->factory->createListFromChoices($choices2));
     }
 
-    public function testCreateFromChoicesFlattensChoices()
+    public function testCreateFromChoicesGroupedChoices()
     {
         $choices1 = array('key' => array('A' => 'a'));
         $choices2 = array('A' => 'a');
-        $list = new \stdClass();
+        $list1 = new \stdClass();
+        $list2 = new \stdClass();
 
-        $this->decoratedFactory->expects($this->once())
+        $this->decoratedFactory->expects($this->at(0))
             ->method('createListFromChoices')
             ->with($choices1)
-            ->will($this->returnValue($list));
+            ->will($this->returnValue($list1));
+        $this->decoratedFactory->expects($this->at(1))
+            ->method('createListFromChoices')
+            ->with($choices2)
+            ->will($this->returnValue($list2));
 
-        $this->assertSame($list, $this->factory->createListFromChoices($choices1));
-        $this->assertSame($list, $this->factory->createListFromChoices($choices2));
+        $this->assertSame($list1, $this->factory->createListFromChoices($choices1));
+        $this->assertSame($list2, $this->factory->createListFromChoices($choices2));
     }
 
     /**