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# -*- coding: utf-8 -*-
#
from django.db.models.signals import m2m_changed, post_save, post_delete
from django.dispatch import receiver
from django.db import transaction
from common.utils import get_logger
from .utils import AssetPermissionUtil
from .models import AssetPermission, Action
logger = get_logger(__file__)
def on_transaction_commit(func):
"""
如果不调用on_commit, 对象创建时添加多对多字段值失败
"""
def inner(*args, **kwargs):
transaction.on_commit(lambda: func(*args, **kwargs))
return inner
@receiver(post_save, sender=AssetPermission, dispatch_uid="my_unique_identifier")
@on_transaction_commit
def on_permission_created(sender, instance=None, created=False, **kwargs):
actions = instance.actions.all()
if created and not actions:
default_action = Action.get_action_all()
instance.actions.add(default_action)
logger.debug(
"Set default action to perms: {}".format(default_action, instance)
)
@receiver(post_save, sender=AssetPermission)
def on_permission_update(sender, **kwargs):
AssetPermissionUtil.expire_all_cache()
@receiver(post_delete, sender=AssetPermission)
def on_permission_delete(sender, **kwargs):
AssetPermissionUtil.expire_all_cache()
@receiver(m2m_changed, sender=AssetPermission.nodes.through)
def on_permission_nodes_changed(sender, instance=None, **kwargs):
if isinstance(instance, AssetPermission) and kwargs['action'] == 'post_add':
logger.debug("Asset permission nodes change signal received")
nodes = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
system_users = instance.system_users.all()
for system_user in system_users:
system_user.nodes.add(*tuple(nodes))
@receiver(m2m_changed, sender=AssetPermission.assets.through)
def on_permission_assets_changed(sender, instance=None, **kwargs):
if isinstance(instance, AssetPermission) and kwargs['action'] == 'post_add':
logger.debug("Asset permission assets change signal received")
assets = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
system_users = instance.system_users.all()
for system_user in system_users:
system_user.assets.add(*tuple(assets))
@receiver(m2m_changed, sender=AssetPermission.system_users.through)
def on_permission_system_users_changed(sender, instance=None, **kwargs):
if isinstance(instance, AssetPermission) and kwargs['action'] == 'post_add':
logger.debug("Asset permission system_users change signal received")
system_users = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
assets = instance.assets.all()
nodes = instance.nodes.all()
for system_user in system_users:
system_user.nodes.add(*tuple(nodes))
system_user.assets.add(*tuple(assets))