Source code for anyblok.model.field_datetime
# This file is a part of the AnyBlok project
#
# Copyright (C) 2017 Jean-Sebastien SUZANNE <jssuzanne@anybox.fr>
#
# This Source Code Form is subject to the terms of the Mozilla Public License,
# v. 2.0. If a copy of the MPL was not distributed with this file,You can
# obtain one at http://mozilla.org/MPL/2.0/.
from .plugins import ModelPluginBase
from anyblok.column import DateTime
from anyblok.mapper import ModelMapper
from datetime import datetime
[docs]class AutoUpdatePlugin(ModelPluginBase):
[docs] def declare_field(self, name, field, namespace, properties,
transformation_properties):
"""Detect if the field is a DateTime with auto_update = True
:param name: field name
:param field: field instance
:param namespace: the namespace of the model
:param properties: the properties of the model
:param transformation_properties: the transformation properties
"""
f = self.registry.loaded_namespaces_first_step[namespace].get(name)
if f and isinstance(f, DateTime) and f.auto_update:
transformation_properties['auto_update_field_datetime'].append(
name)
[docs] def after_model_construction(self, base, namespace,
transformation_properties):
"""Add the sqlalchemy event
:param base: the Model class
:param namespace: the namespace of the model
:param transformation_properties: the properties of the model
"""
if transformation_properties['auto_update_field_datetime']:
e = ModelMapper(namespace, 'after_update')
fields = transformation_properties['auto_update_field_datetime']
def auto_update_listen(mapper, connection, target):
now = datetime.now()
for field in fields:
setattr(target, field, now)
self.registry._sqlalchemy_known_events.append(
(e, namespace, auto_update_listen))