[Form] Fix show float values as choices values in ChoiceType

Author: yceruto

src/Symfony/Component/Form/ChoiceList/ArrayChoiceList.php

@@ -236,7 +236,11 @@ private function castableToString(array $choices, array &$cache = array())
                 continue;
             } elseif (!is_scalar($choice)) {
                 return false;
-            } elseif (isset($cache[$choice])) {
+            }
+
+            $choice = false === $choice ? '0' : (string) $choice;
+
+            if (isset($cache[$choice])) {
                 return false;
             }
 

src/Symfony/Component/Form/Tests/ChoiceList/ArrayChoiceListTest.php

@@ -34,12 +34,12 @@ protected function createChoiceList()
 
     protected function getChoices()
     {
-        return array(0, 1, '1', 'a', false, true, $this->object, null);
+        return array(0, 1, 1.5, '1', 'a', false, true, $this->object, null);
     }
 
     protected function getValues()
     {
-        return array('0', '1', '2', '3', '4', '5', '6', '7');
+        return array('0', '1', '2', '3', '4', '5', '6', '7', '8');
     }
 
     /**
@@ -162,4 +162,13 @@ public function testGetChoicesForValuesWithContainingEmptyStringAndBooleans()
         $this->assertSame(array(0 => true), $choiceList->getChoicesForValues(array('1')));
         $this->assertSame(array(0 => false), $choiceList->getChoicesForValues(array('0')));
     }
+
+    public function testGetChoicesForValuesWithContainingEmptyStringAndFloats()
+    {
+        $choiceList = new ArrayChoiceList(array('Empty String' => '', '1/3' => 0.3, '1/2' => 0.5));
+
+        $this->assertSame(array(0 => ''), $choiceList->getChoicesForValues(array('')));
+        $this->assertSame(array(0 => 0.3), $choiceList->getChoicesForValues(array('0.3')));
+        $this->assertSame(array(0 => 0.5), $choiceList->getChoicesForValues(array('0.5')));
+    }
 }