csrf and property_path option added

Author: ikwattro

reference/forms/types/csrf.rst

@@ -11,7 +11,10 @@ The ``csrf`` type is a hidden input field containing a CSRF token.
 +-------------+--------------------------------------------------------------------+
 | Options | - ``csrf_provider`` |
 | | - ``page_id`` |
-| | - ``error_bubbling`` |
+| | - ``property_path`` |
++-------------+--------------------------------------------------------------------+
+| Inherited | - ``error_bubbling`` |
+| options | |
 +-------------+--------------------------------------------------------------------+
 | Parent type | ``hidden`` |
 +-------------+--------------------------------------------------------------------+
@@ -28,6 +31,13 @@ Options
 * ``page_id`` [type: string]
  An optional page identifier used to generate the CSRF token.
 
+.. include:: /reference/forms/types/options/property_path.rst.inc
+
+Inherited options
+-----------------
+
+These options are inherited from the parent ``fieldType`` class.
+
 * ``error_bubbling`` [type: Boolean, default: true]
  .. include:: /reference/forms/types/options/error_bubbling.rst.inc
  :start-line: 1

reference/forms/types/options/preferred_choices.rst.inc

@@ -1,3 +1,4 @@
+
 * ``preferred_choices`` [type: array]
  If this option is specified, then a sub-set of the total number of options
  will be moved to the top of the select menu. The following would move

reference/forms/types/options/property_path.rst.inc

@@ -0,0 +1,7 @@
+* ``property_path`` [type: any, default: the field's value]
+ Fields display a property value of the form's domain object by default. When
+ the form is submitted, the submitted value is written back into the object.
+
+ If you want to override the property that a field reads from and writes to, 
+ you can set the ``property_path`` option. Its default value is the field's
+ name.