document the auto_initialize option for the form type, refs symfony#3410

xabbuh · xabbuh · commit 58170fe71fcf · 2014-03-19T09:07:13.000+01:00
diff --git a/reference/forms/types/form.rst b/reference/forms/types/form.rst
@@ -36,6 +36,7 @@ on all types for which ``form`` is the parent type.
 |           | - `label`_                                                         |
 |           | - `attr`_                                                          |
 |           | - `translation_domain`_                                            |
+|           | - `auto_initialize`_                                               |
 +-----------+--------------------------------------------------------------------+
 | Parent    | none                                                               |
 +-----------+--------------------------------------------------------------------+
@@ -121,3 +122,5 @@ of the form type tree (i.e. it can not be used as a form type on its own).
 .. include:: /reference/forms/types/options/attr.rst.inc
 
 .. include:: /reference/forms/types/options/translation_domain.rst.inc
+
+.. include:: /reference/forms/types/options/auto_initialize.rst.inc
diff --git a/reference/forms/types/options/auto_initialize.rst.inc b/reference/forms/types/options/auto_initialize.rst.inc
@@ -0,0 +1,8 @@
+auto_initialize
+~~~~~~~~~~~~~~~
+
+**type**: ``boolean``  **default**: ``true``
+
+An internal option: sets whether the form should be initialized automatically.
+For all fields, this option should only be ``true`` for root forms. You won't
+need to change this option and probably won't need to worry about it.
