mirror of https://github.com/jumpserver/jumpserver
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
105 lines
3.2 KiB
105 lines
3.2 KiB
# -*- coding: utf-8 -*-
|
|
#
|
|
from collections import defaultdict
|
|
from typing import Callable
|
|
|
|
from django.db.models.signals import m2m_changed
|
|
from rest_framework.response import Response
|
|
|
|
from .action import RenderToJsonMixin
|
|
from .filter import ExtraFilterFieldsMixin
|
|
from .serializer import SerializerMixin
|
|
|
|
__all__ = [
|
|
'CommonApiMixin', 'PaginatedResponseMixin', 'RelationMixin',
|
|
]
|
|
|
|
|
|
class PaginatedResponseMixin:
|
|
paginate_queryset: Callable
|
|
get_serializer: Callable
|
|
get_paginated_response: Callable
|
|
|
|
def get_paginated_response_from_queryset(self, queryset):
|
|
page = self.paginate_queryset(queryset)
|
|
if page is not None:
|
|
serializer = self.get_serializer(page, many=True)
|
|
return self.get_paginated_response(serializer.data)
|
|
|
|
serializer = self.get_serializer(queryset, many=True)
|
|
return Response(serializer.data)
|
|
|
|
|
|
class RelationMixin:
|
|
m2m_field = None
|
|
from_field = None
|
|
to_field = None
|
|
to_model = None
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
|
|
assert self.m2m_field is not None, '''
|
|
`m2m_field` should not be `None`
|
|
'''
|
|
|
|
self.from_field = self.m2m_field.m2m_field_name()
|
|
self.to_field = self.m2m_field.m2m_reverse_field_name()
|
|
self.to_model = self.m2m_field.related_model
|
|
self.through = getattr(self.m2m_field.model, self.m2m_field.attname).through
|
|
|
|
def get_queryset(self):
|
|
# 注意，此处拦截了 `get_queryset` 没有 `super`
|
|
queryset = self.through.objects.all()
|
|
return queryset
|
|
|
|
def send_m2m_changed_signal(self, instances, action):
|
|
if not isinstance(instances, list):
|
|
instances = [instances]
|
|
|
|
from_to_mapper = defaultdict(list)
|
|
|
|
for i in instances:
|
|
to_id = getattr(i, self.to_field).id
|
|
# TODO 优化，不应该每次都查询数据库
|
|
from_obj = getattr(i, self.from_field)
|
|
from_to_mapper[from_obj].append(to_id)
|
|
|
|
for from_obj, to_ids in from_to_mapper.items():
|
|
m2m_changed.send(
|
|
sender=self.through, instance=from_obj, action=action,
|
|
reverse=False, model=self.to_model, pk_set=to_ids
|
|
)
|
|
|
|
def perform_create(self, serializer):
|
|
instance = serializer.save()
|
|
self.send_m2m_changed_signal(instance, 'post_add')
|
|
|
|
def perform_destroy(self, instance):
|
|
instance.delete()
|
|
self.send_m2m_changed_signal(instance, 'post_remove')
|
|
|
|
|
|
class QuerySetMixin:
|
|
action: str
|
|
get_serializer_class: Callable
|
|
get_queryset: Callable
|
|
|
|
def get_queryset(self):
|
|
queryset = super().get_queryset()
|
|
if not hasattr(self, 'action'):
|
|
return queryset
|
|
if self.action == 'metadata':
|
|
queryset = queryset.none()
|
|
if self.action in ['list', 'metadata']:
|
|
serializer_class = self.get_serializer_class()
|
|
if serializer_class and hasattr(serializer_class, 'setup_eager_loading'):
|
|
queryset = serializer_class.setup_eager_loading(queryset)
|
|
return queryset
|
|
|
|
|
|
class CommonApiMixin(SerializerMixin, ExtraFilterFieldsMixin,
|
|
QuerySetMixin, RenderToJsonMixin,
|
|
PaginatedResponseMixin):
|
|
pass
|