def apply_data_event(fields, content, data, event=ObjectModifiedEvent):
""" Updates the object with the data and sends an IObjectModifiedEvent
"""
changes = set_fields_data(fields, content, data)
if changes:
if IDataManager.providedBy(content):
notify_changes(content.content, changes, event)
else:
notify_changes(content, changes, event)
return changes
def set_fields_data(fields, content, data):
"""Applies the values to the fields, if a change has been made and
if the field is present in the given fields manager. It returns a
dictionnary describing the changes applied with the name of the field
and the interface from where it's from.
"""
changes = {}
if not IDataManager.providedBy(content):
content = ObjectDataManager(content)
for identifier, value in data.items():
field = fields.get(identifier, default=None)
if field is None or value is NO_VALUE or value is NO_CHANGE:
continue
content.set(identifier, value)
changes.setdefault(field.interface, []).append(identifier)
return changes
