def database_delete_host(request, database_id, host_id):
database = Database.objects.get(id=database_id)
instance = database.infra.instances.get(hostname_id=host_id)
can_delete = True
if not instance.read_only:
messages.add_message(
request, messages.ERROR,
'Host is not read only, cannot be removed.'
)
can_delete = False
if database.is_being_used_elsewhere():
messages.add_message(
request, messages.ERROR,
'Host cannot be deleted because database is in use by another task.'
)
can_delete = False
if can_delete:
TaskRegister.database_remove_instance(database=database, instance=instance, user=request.user)
return HttpResponseRedirect(
reverse('admin:logical_database_hosts', kwargs={'id': database.id})
)
def database_delete_host(request, database_id, host_id):
database = Database.objects.get(id=database_id)
instance = database.infra.instances.get(hostname_id=host_id)
can_delete = True
if not instance.read_only:
messages.add_message(
request, messages.ERROR,
'Host is not read only, cannot be removed.'
)
can_delete = False
if database.is_being_used_elsewhere():
messages.add_message(
request, messages.ERROR,
'Host cannot be deleted because database is in use by another task.'
)
can_delete = False
if can_delete:
TaskRegister.database_remove_instance(database=database, instance=instance, user=request.user)
return HttpResponseRedirect(
reverse('admin:logical_database_hosts', kwargs={'id': database.id})
)
def execute(self):
status, message = self.check_database_status()
if not status:
raise exceptions.DatabaseNotAvailable(message)
if not self.instance.read_only:
raise exceptions.HostIsNotReadOnly(
"Host is not read only, cannot be removed.")
self.task_params = dict(database=self.database,
user=self.request.user,
instance=self.instance)
if self.retry:
since_step = self.manager.current_step
self.task_params['since_step'] = since_step
self.task_params['step_manager'] = self.manager
TaskRegister.database_remove_instance(**self.task_params)
