Override _get_user_input_value in order to let ParallelListField retrieve its values

when it is used inside a Listbox.
The patch consist into iteration over each subfield keys in order to retrieve values from
REQUEST for each occurrence of subfields.

Fix the display of dialog when validation of form fails, because user filled values are not lost.



git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@40170 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ParallelListField.py

@@ -234,6 +234,46 @@ class ParallelListField(ZMIField):
     """
     return paralellListFieldGetValue(self, id, REQUEST=REQUEST, **kw)
 
+  def _get_user_input_value(self, key, REQUEST):
+    """
+    Try to get a value of the field from the REQUEST.
+    This method is extended in order to retrive values
+    from REQUEST for each subfield.
+    then a list of values will be returned
+    This is required for parallel listfields inside listbox
+    """
+    value_list = []
+    try:
+      value = REQUEST.form[key]
+    except (KeyError, AttributeError):
+      # Fallback with id of field on rendered form
+      # So try to get the proxy_field if exists
+      # because template field may have a different id.
+      # And configuration of properties
+      # can be different (not delegated)
+      # So the following code works only with original field
+      # ie: proxy_field
+      field = REQUEST.get(
+        'field__proxyfield_%s_%s_%s' % (self.id, self._p_oid, 'default'),
+        self)
+      # call hash_list to iterate over each subfield
+      hash_list = generateSubForm(field, [], REQUEST)
+      for sub_field_property_dict in hash_list:
+        # compute if of each subfield
+        sub_key = field.generate_subfield_key(sub_field_property_dict['key'],
+                                              key=key)
+        # retrieve the user filled value in REQUEST
+        sub_value = REQUEST.get(sub_key, MARKER)
+        if sub_value is not MARKER:
+          value_list.append(sub_value)
+      if not value_list:
+        # Raise KeyError if any value has not been found
+        # This reproduce expected behaviour of
+        # REQUEST.form[key]
+        raise KeyError
+      value = value_list
+    return value
+
 def generateSubForm(self, value, REQUEST):
   item_list = [x for x in self.get_value('items', REQUEST=REQUEST)
                  if x[0] != '' and x[1]]