def _on_ui_save(self):
"""Called when data should be saved
Calls merge_changes, but only with values that really changed
"""
effective_changes = self.pending_changes()
is_valid = False
self.logger.debug("Request to apply model changes: %s" %
effective_changes)
try:
is_valid = self._on_ui_change(effective_changes)
except exceptions.InvalidData as e:
self.logger.info("Changes to be merged are invalid: %s" %
e.message)
if self.only_merge_on_valid_changes and not is_valid:
msg = "There are still fields with invalid values."
self.logger.warning(msg)
raise exceptions.PreconditionError(msg)
successfull_merge = self.on_merge(effective_changes)
if successfull_merge is None:
self.logger.debug("on_save needs to return True/False or a " +
"Page/Dialog")
successfull_merge = True
if successfull_merge:
self.logger.info("Changes were merged successfully")
self.__changes = Changeset()
else:
self.logger.info("Changes were not merged.")
return self.__handle_merge_result(successfull_merge)
def prepare(self):
self._prepared_elements = []
for element in self:
self.logger.debug("Preparing element '%s'" % element)
if Transaction.Element not in element.__class__.mro():
raise exceptions.PreconditionError(
("%s is no Transaction." + "Element") % element)
self._prepared_elements.append(element)
element.prepare()
return True
def prepare(self):
self._prepared_elements = []
for element in self.elements:
self.logger.debug("Preparing element '%s'" % element)
if not issubclass(element.__class__, Transaction.Element) and \
not issubclass(element.__class__, Transaction):
raise exceptions.PreconditionError(("%s is no Transaction."
"Element") % element)
self._prepared_elements.append(element)
element.prepare()
return True
