Model choice accept custom unique column

Use now ->add('my_field', 'model', array('class' => 'MyClassWithSlug', 'index_property' => 'slug'));
To make choice list keys as slug

src/Symfony/Bridge/Propel1/Form/ChoiceList/ModelChoiceList.php

@@ -71,17 +71,18 @@ class ModelChoiceList extends ObjectChoiceList
      *
      * @see \Symfony\Bridge\Propel1\Form\Type\ModelType How to use the preferred choices.
      *
-     * @param string                   $class             The FQCN of the model class to be loaded.
-     * @param string                   $labelPath         A property path pointing to the property used for the choice labels.
-     * @param array                    $choices           An optional array to use, rather than fetching the models.
-     * @param ModelCriteria            $queryObject       The query to use retrieving model data from database.
-     * @param string                   $groupPath         A property path pointing to the property used to group the choices.
-     * @param array|ModelCriteria      $preferred         The preferred items of this choice.
+     * @param string                    $class            The FQCN of the model class to be loaded.
+     * @param string                    $labelPath        A property path pointing to the property used for the choice labels.
+     * @param array                     $choices          An optional array to use, rather than fetching the models.
+     * @param ModelCriteria             $queryObject      The query to use retrieving model data from database.
+     * @param string                    $groupPath        A property path pointing to the property used to group the choices.
+     * @param array|ModelCriteria       $preferred        The preferred items of this choice.
      *                                                    Either an array if $choices is given,
      *                                                    or a ModelCriteria to be merged with the $queryObject.
+     * @param string                    $useAsIdentifier  a custome unique column (eg slug) to use instead of primary key
      * @param PropertyAccessorInterface $propertyAccessor The reflection graph for reading property paths.
      */
-    public function __construct($class, $labelPath = null, $choices = null, $queryObject = null, $groupPath = null, $preferred = array(), PropertyAccessorInterface $propertyAccessor = null)
+    public function __construct($class, $labelPath = null, $choices = null, $queryObject = null, $groupPath = null, $preferred = array(), PropertyAccessorInterface $propertyAccessor = null, $useAsIdentifier = null)
     {
         $this->class        = $class;
 
@@ -96,7 +97,12 @@ public function __construct($class, $labelPath = null, $choices = null, $queryOb
         $query              = new $queryClass();
 
         $this->query        = $queryObject ?: $query;
-        $this->identifier   = $this->query->getTableMap()->getPrimaryKeys();
+        if ($useAsIdentifier) {
+            $this->identifier   = array( $this->query->getTableMap()->getColumn($useAsIdentifier) );
+        } else {
+            $this->identifier   = $this->query->getTableMap()->getPrimaryKeys();
+        }
+
         $this->loaded       = is_array($choices) || $choices instanceof \Traversable;
 
         if ($preferred instanceof ModelCriteria) {
@@ -437,6 +443,14 @@ private function getIdentifierValues($model)
             return array();
         }
 
+        if (1 === count($this->identifier) && current($this->identifier) instanceof \ColumnMap) {
+            $phpName = current($this->identifier)->getPhpName();
+
+            if (method_exists($model, 'get'.$phpName)) {
+                return array($model->{'get'.$phpName}());
+            }
+        }
+
         if ($model instanceof Persistent) {
             return array($model->getPrimaryKey());
         }

src/Symfony/Bridge/Propel1/Form/Type/ModelType.php

@@ -79,7 +79,8 @@ public function setDefaultOptions(OptionsResolverInterface $resolver)
                 $options['query'],
                 $options['group_by'],
                 $options['preferred_choices'],
-                $propertyAccessor
+                $propertyAccessor,
+                $options['index_property']
             );
         };
 
@@ -94,6 +95,7 @@ public function setDefaultOptions(OptionsResolverInterface $resolver)
             'choice_list'       => $choiceList,
             'group_by'          => null,
             'by_reference'      => false,
+            'index_property'    => null,
         ));
     }
 

src/Symfony/Bridge/Propel1/Tests/Fixtures/Column.php

@@ -11,16 +11,17 @@
 
 namespace Symfony\Bridge\Propel1\Tests\Fixtures;
 
-class Column
+class Column extends \ColumnMap
 {
     private $name;
 
-    private $type;
+    protected $type;
 
     public function __construct($name, $type)
     {
         $this->name = $name;
         $this->type = $type;
+        $this->phpName = ucfirst($name);
     }
 
     public function getType()

src/Symfony/Bridge/Propel1/Tests/Fixtures/Item.php

@@ -23,12 +23,15 @@ class Item implements \Persistent
 
     private $price;
 
-    public function __construct($id = null, $value = null, $groupName = null, $price = null)
+    private $slug;
+
+    public function __construct($id = null, $value = null, $groupName = null, $price = null, $slug = null)
     {
         $this->id = $id;
         $this->value = $value;
         $this->groupName = $groupName;
         $this->price = $price;
+        $this->slug = $slug;
     }
 
     public function getId()
@@ -56,6 +59,11 @@ public function getPrice()
         return $this->price;
     }
 
+    public function getSlug()
+    {
+        return $this->slug;
+    }
+
     public function getPrimaryKey()
     {
         return $this->getId();

src/Symfony/Bridge/Propel1/Tests/Fixtures/ItemQuery.php

@@ -18,6 +18,7 @@ class ItemQuery
         'value'         => \PropelColumnTypes::VARCHAR,
         'price'         => \PropelColumnTypes::FLOAT,
         'is_active'     => \PropelColumnTypes::BOOLEAN,
+        'slug'          => \PropelColumnTypes::VARCHAR,
         'enabled'       => \PropelColumnTypes::BOOLEAN_EMU,
         'updated_at'    => \PropelColumnTypes::TIMESTAMP,
     );

src/Symfony/Bridge/Propel1/Tests/Form/ChoiceList/ModelChoiceListTest.php

@@ -259,4 +259,26 @@ public function testInvalidClass()
     {
         $choiceList = new ModelChoiceList('Foo\Bar\DoesNotExistClass');
     }
+
+    public function testCustomIdentifier()
+    {
+        $item1 = new Item(1, 'Foo', null, null, 'slug');
+        $item2 = new Item(2, 'Bar', null, null, 'slug2');
+
+        $choiceList = new ModelChoiceList(
+            self::ITEM_CLASS,
+            'value',
+            array(
+                $item1,
+                $item2,
+            ),
+            null,
+            null,
+            array(),
+            null,
+            'slug'
+        );
+
+        $this->assertSame(array('slug' => $item1, 'slug2' => $item2), $choiceList->getChoices());
+    }
 }