151 lines
6.3 KiB
Python
151 lines
6.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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@author: 猿小天
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@contact: QQ:1638245306
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@Created on: 2021/6/1 001 22:57
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@Remark: 自定义视图集
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"""
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from django.db import transaction
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from drf_yasg import openapi
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from drf_yasg.utils import swagger_auto_schema
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from rest_framework.decorators import action
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from rest_framework.viewsets import ModelViewSet
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from dvadmin.utils.filters import DataLevelPermissionsFilter
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from dvadmin.utils.import_export_mixin import ExportSerializerMixin, ImportSerializerMixin
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from dvadmin.utils.json_response import SuccessResponse, ErrorResponse, DetailResponse
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from dvadmin.utils.permission import CustomPermission
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from dvadmin.utils.models import get_custom_app_models
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from dvadmin.system.models import FieldPermission, MenuField
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from django_restql.mixins import QueryArgumentsMixin
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class CustomModelViewSet(ModelViewSet, ImportSerializerMixin, ExportSerializerMixin, QueryArgumentsMixin):
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"""
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自定义的ModelViewSet:
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统一标准的返回格式;新增,查询,修改可使用不同序列化器
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(1)ORM性能优化, 尽可能使用values_queryset形式
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(2)xxx_serializer_class 某个方法下使用的序列化器(xxx=create|update|list|retrieve|destroy)
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(3)filter_fields = '__all__' 默认支持全部model中的字段查询(除json字段外)
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(4)import_field_dict={} 导入时的字段字典 {model值: model的label}
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(5)export_field_label = [] 导出时的字段
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"""
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values_queryset = None
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ordering_fields = '__all__'
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create_serializer_class = None
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update_serializer_class = None
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filter_fields = '__all__'
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search_fields = ()
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extra_filter_class = [DataLevelPermissionsFilter]
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permission_classes = [CustomPermission]
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import_field_dict = {}
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export_field_label = {}
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def filter_queryset(self, queryset):
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for backend in set(set(self.filter_backends) | set(self.extra_filter_class or [])):
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queryset = backend().filter_queryset(self.request, queryset, self)
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return queryset
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def get_queryset(self):
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if getattr(self, 'values_queryset', None):
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return self.values_queryset
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return super().get_queryset()
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def get_serializer_class(self):
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action_serializer_name = f"{self.action}_serializer_class"
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action_serializer_class = getattr(self, action_serializer_name, None)
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if action_serializer_class:
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return action_serializer_class
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return super().get_serializer_class()
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# 通过many=True直接改造原有的API，使其可以批量创建
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def get_serializer(self, *args, **kwargs):
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serializer_class = self.get_serializer_class()
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kwargs.setdefault('context', self.get_serializer_context())
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# 全部以可见字段为准
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can_see = self.get_menu_field(serializer_class)
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# 排除掉序列化器级的字段
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# sub_set = set(serializer_class._declared_fields.keys()) - set(can_see)
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# for field in sub_set:
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# serializer_class._declared_fields.pop(field)
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# if not self.request.user.is_superuser:
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# serializer_class.Meta.fields = can_see
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# 在分页器中使用
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self.request.permission_fields = can_see
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if isinstance(self.request.data, list):
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with transaction.atomic():
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return serializer_class(many=True, *args, **kwargs)
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else:
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return serializer_class(*args, **kwargs)
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def get_menu_field(self, serializer_class):
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"""获取字段权限"""
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finded = False
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for app in get_custom_app_models():
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for model in app:
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if model['object'] is serializer_class.Meta.model:
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finded = True
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break
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if finded:
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break
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if finded is False:
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return []
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return MenuField.objects.filter(model=model['model']
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).values('field_name', 'title')
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def create(self, request, *args, **kwargs):
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serializer = self.get_serializer(data=request.data, request=request)
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serializer.is_valid(raise_exception=True)
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self.perform_create(serializer)
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return DetailResponse(data=serializer.data, msg="新增成功")
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def list(self, request, *args, **kwargs):
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queryset = self.filter_queryset(self.get_queryset())
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page = self.paginate_queryset(queryset)
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if page is not None:
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serializer = self.get_serializer(page, many=True, request=request)
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return self.get_paginated_response(serializer.data)
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serializer = self.get_serializer(queryset, many=True, request=request)
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return SuccessResponse(data=serializer.data, msg="获取成功")
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def retrieve(self, request, *args, **kwargs):
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instance = self.get_object()
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serializer = self.get_serializer(instance)
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return DetailResponse(data=serializer.data, msg="获取成功")
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def update(self, request, *args, **kwargs):
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partial = kwargs.pop('partial', False)
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instance = self.get_object()
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serializer = self.get_serializer(instance, data=request.data, request=request, partial=partial)
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serializer.is_valid(raise_exception=True)
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self.perform_update(serializer)
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if getattr(instance, '_prefetched_objects_cache', None):
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# If 'prefetch_related' has been applied to a queryset, we need to
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# forcibly invalidate the prefetch cache on the instance.
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instance._prefetched_objects_cache = {}
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return DetailResponse(data=serializer.data, msg="更新成功")
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def destroy(self, request, *args, **kwargs):
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instance = self.get_object()
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instance.delete()
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return DetailResponse(data=[], msg="删除成功")
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keys = openapi.Schema(description='主键列表', type=openapi.TYPE_ARRAY, items=openapi.TYPE_STRING)
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@swagger_auto_schema(request_body=openapi.Schema(
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type=openapi.TYPE_OBJECT,
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required=['keys'],
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properties={'keys': keys}
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), operation_summary='批量删除')
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@action(methods=['delete'], detail=False)
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def multiple_delete(self, request, *args, **kwargs):
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request_data = request.data
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keys = request_data.get('keys', None)
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if keys:
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self.get_queryset().filter(id__in=keys).delete()
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return SuccessResponse(data=[], msg="删除成功")
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else:
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return ErrorResponse(msg="未获取到keys字段")
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