import operator
import re
from collections import OrderedDict
from functools import reduce
import six
from django.db import models
from django.db.models import Q, F
from django.db.models.constants import LOOKUP_SEP
from django_filters import utils, FilterSet
from django_filters.constants import ALL_FIELDS
from django_filters.filters import CharFilter, DateTimeFromToRangeFilter
from django_filters.rest_framework import DjangoFilterBackend
from django_filters.utils import get_model_field
from rest_framework.filters import BaseFilterBackend
from django_filters.conf import settings
from apps.system.models import Dept, ApiWhiteList, RoleMenuButtonPermission
class CustomDjangoFilterBackend(BaseFilterBackend):
"""
自定义时间范围过滤器
"""
def filter_queryset(self, request, queryset, view):
create_datetime_after = request.query_params.get('create_datetime_after', None)
create_datetime_before = request.query_params.get('create_datetime_before', None)
update_datetime_after = request.query_params.get('update_datetime_after', None)
update_datetime_before = request.query_params.get('update_datetime_after', None)
if any([create_datetime_after, create_datetime_before, update_datetime_after, update_datetime_before]):
create_filter = Q()
if create_datetime_after and create_datetime_before:
create_filter &= Q(create_datetime__gte=create_datetime_after) & Q(
create_datetime__lte=create_datetime_before)
elif create_datetime_after:
create_filter &= Q(create_datetime__gte=create_datetime_after)
elif create_datetime_before:
create_filter &= Q(create_datetime__lte=create_datetime_before)
# 更新时间范围过滤条件
update_filter = Q()
if update_datetime_after and update_datetime_before:
update_filter &= Q(update_datetime__gte=update_datetime_after) & Q(
update_datetime__lte=update_datetime_before)
elif update_datetime_after:
update_filter &= Q(update_datetime__gte=update_datetime_after)
elif update_datetime_before:
update_filter &= Q(update_datetime__lte=update_datetime_before)
# 结合两个时间范围过滤条件
queryset = queryset.filter(create_filter & update_filter)
return queryset
return queryset
def get_dept(dept_id: int, dept_all_list=None, dept_list=None):
"""
递归获取部门的所有下级部门
:param dept_id: 需要获取的部门id
:param dept_all_list: 所有部门列表
:param dept_list: 递归部门list
:return:
"""
if not dept_all_list:
dept_all_list = Dept.objects.all().values("id", "parent")
if dept_list is None:
dept_list = [dept_id]
for ele in dept_all_list:
if ele.get("parent") == dept_id:
dept_list.append(ele.get("id"))
get_dept(ele.get("id"), dept_all_list, dept_list)
return list(set(dept_list))
class DataLevelPermissionsFilter(BaseFilterBackend):
"""
数据 级权限过滤器
0. 获取用户的部门id，没有部门则返回空
1. 判断过滤的数据是否有创建人所在部门 "creator" 字段,没有则返回全部
2. 如果用户没有关联角色则返回本部门数据
3. 根据角色的最大权限进行数据过滤(会有多个角色，进行去重取最大权限)
3.1 判断用户是否为超级管理员角色/如果有1(所有数据) 则返回所有数据
4. 只为仅本人数据权限时只返回过滤本人数据，并且部门为自己本部门(考虑到用户会变部门，只能看当前用户所在的部门数据)
5. 自定数据权限 获取部门，根据部门过滤
"""
def filter_queryset(self, request, queryset, view):
"""
接口白名单是否认证数据权限
"""
api = request.path # 当前请求接口
method = request.method # 当前请求方法
methodList = ["GET", "POST", "PUT", "DELETE", "OPTIONS"]
method = methodList.index(method)
# ***接口白名单***
api_white_list = ApiWhiteList.objects.filter(enable_datasource=False).values(
permission__api=F("url"), permission__method=F("method")
)
api_white_list = [
str(item.get("permission__api").replace("{id}", ".*?"))
+ ":"
+ str(item.get("permission__method"))
for item in api_white_list
if item.get("permission__api")
]
for item in api_white_list:
new_api = f"{api}:{method}"
matchObj = re.match(item, new_api, re.M | re.I)
if matchObj is None:
continue
else:
return queryset
"""
判断是否为超级管理员:
如果不是超级管理员,则进入下一步权限判断
"""
if request.user.is_superuser == 0:
return self._extracted_from_filter_queryset_33(request, queryset, api, method)
else:
return queryset
# TODO Rename this here and in `filter_queryset`
def _extracted_from_filter_queryset_33(self, request, queryset, api, method):
# 0. 获取用户的部门id，没有部门则返回空
user_dept_id = getattr(request.user, "dept_id", None)
if not user_dept_id:
return queryset.none()
# 1. 判断过滤的数据是否有创建人所在部门 "dept_belong_id" 字段
if not getattr(queryset.model, "dept_belong_id", None):
return queryset
# 2. 如果用户没有关联角色则返回本部门数据
if not hasattr(request.user, "role"):
return queryset.filter(dept_belong_id=user_dept_id)
# 3. 根据所有角色 获取所有权限范围
# (0, "仅本人数据权限"),
# (1, "本部门及以下数据权限"),
# (2, "本部门数据权限"),
# (3, "全部数据权限"),
# (4, "自定数据权限")
re_api = api
_pk = request.parser_context["kwargs"].get('pk')
if _pk: # 判断是否是单例查询
re_api = re.sub(_pk, '{id}', api)
role_id_list = request.user.role.values_list('id', flat=True)
role_permission_list = RoleMenuButtonPermission.objects.filter(
role__in=role_id_list,
role__status=1,
menu_button__api=re_api,
menu_button__method=method).values(
'data_range'
)
dataScope_list = [] # 权限范围列表
for ele in role_permission_list:
# 判断用户是否为超级管理员角色/如果拥有[全部数据权限]则返回所有数据
if ele.get("data_range") == 3:
return queryset
dataScope_list.append(ele.get("data_range"))
dataScope_list = list(set(dataScope_list))
# 4. 只为仅本人数据权限时只返回过滤本人数据，并且部门为自己本部门(考虑到用户会变部门，只能看当前用户所在的部门数据)
if 0 in dataScope_list:
return queryset.filter(
creator=request.user, dept_belong_id=user_dept_id
)
# 5. 自定数据权限 获取部门，根据部门过滤
dept_list = []
for ele in dataScope_list:
if ele == 1:
dept_list.append(user_dept_id)
dept_list.extend(
get_dept(
user_dept_id,
)
)
elif ele == 2:
dept_list.append(user_dept_id)
elif ele == 4:
dept_ids = RoleMenuButtonPermission.objects.filter(
role__in=role_id_list,
role__status=1,
data_range=4).values_list(
'dept__id', flat=True
)
dept_list.extend(
dept_ids
)
if queryset.model._meta.model_name == 'dept':
return queryset.filter(id__in=list(set(dept_list)))
return queryset.filter(dept_belong_id__in=list(set(dept_list)))
class CustomDjangoFilterBackend(DjangoFilterBackend):
lookup_prefixes = {
"^": "istartswith",
"=": "iexact",
"@": "search",
"$": "iregex",
"~": "icontains",
}
filter_fields = "__all__"
def construct_search(self, field_name, lookup_expr=None):
lookup = self.lookup_prefixes.get(field_name[0])
if lookup:
field_name = field_name[1:]
else:
lookup = lookup_expr
if lookup:
if field_name.endswith(lookup):
return field_name
return LOOKUP_SEP.join([field_name, lookup])
return field_name
def find_filter_lookups(self, orm_lookups, search_term_key):
for lookup in orm_lookups:
# if lookup.find(search_term_key) >= 0:
new_lookup = LOOKUP_SEP.join(lookup.split(LOOKUP_SEP)[:-1]) if len(lookup.split(LOOKUP_SEP)) > 1 else lookup
# 修复条件搜索错误 bug
if new_lookup == search_term_key:
return lookup
return None
def get_filterset_class(self, view, queryset=None):
"""
Return the `FilterSet` class used to filter the queryset.
"""
filterset_class = getattr(view, "filterset_class", None)
filterset_fields = getattr(view, "filterset_fields", None)
# TODO: remove assertion in 2.1
if filterset_class is None and hasattr(view, "filter_class"):
utils.deprecate(
"`%s.filter_class` attribute should be renamed `filterset_class`." % view.__class__.__name__
)
filterset_class = getattr(view, "filter_class", None)
# TODO: remove assertion in 2.1
if filterset_fields is None and hasattr(view, "filter_fields"):
utils.deprecate(
"`%s.filter_fields` attribute should be renamed `filterset_fields`." % view.__class__.__name__
)
self.filter_fields = getattr(view, "filter_fields", None)
if isinstance(self.filter_fields, (list, tuple)):
filterset_fields = [
field[1:] if field[0] in self.lookup_prefixes.keys() else field for field in self.filter_fields
]
else:
filterset_fields = self.filter_fields
if filterset_class:
filterset_model = filterset_class._meta.model
# FilterSets do not need to specify a Meta class
if filterset_model and queryset is not None:
assert issubclass(
queryset.model, filterset_model
), "FilterSet model %s does not match queryset model %s" % (
filterset_model,
queryset.model,
)
return filterset_class
if filterset_fields and queryset is not None:
MetaBase = getattr(self.filterset_base, "Meta", object)
class AutoFilterSet(self.filterset_base):
@classmethod
def get_all_model_fields(cls, model):
opts = model._meta
return [
f.name
for f in sorted(opts.fields + opts.many_to_many)
if (f.name == "id")
or not isinstance(f, models.AutoField)
and not (getattr(f.remote_field, "parent_link", False))
]
@classmethod
def get_fields(cls):
"""
Resolve the 'fields' argument that should be used for generating filters on the
filterset. This is 'Meta.fields' sans the fields in 'Meta.exclude'.
"""
model = cls._meta.model
fields = cls._meta.fields
exclude = cls._meta.exclude
assert not (fields is None and exclude is None), (
"Setting 'Meta.model' without either 'Meta.fields' or 'Meta.exclude' "
"has been deprecated since 0.15.0 and is now disallowed. Add an explicit "
"'Meta.fields' or 'Meta.exclude' to the %s class." % cls.__name__
)
# Setting exclude with no fields implies all other fields.
if exclude is not None and fields is None:
fields = ALL_FIELDS
# Resolve ALL_FIELDS into all fields for the filterset's model.
if fields == ALL_FIELDS:
fields = cls.get_all_model_fields(model)
# Remove excluded fields
exclude = exclude or []
if not isinstance(fields, dict):
fields = [(f, [settings.DEFAULT_LOOKUP_EXPR]) for f in fields if f not in exclude]
else:
fields = [(f, lookups) for f, lookups in fields.items() if f not in exclude]
return OrderedDict(fields)
@classmethod
def get_filters(cls):
"""
Get all filters for the filterset. This is the combination of declared and
generated filters.
"""
# No model specified - skip filter generation
if not cls._meta.model:
return cls.declared_filters.copy()
# Determine the filters that should be included on the filterset.
filters = OrderedDict()
fields = cls.get_fields()
undefined = []
for field_name, lookups in fields.items():
field = get_model_field(cls._meta.model, field_name)
from django.db import models
from timezone_field import TimeZoneField
# 不进行 过滤的model 类
if isinstance(field, (models.JSONField, TimeZoneField)):
continue
# warn if the field doesn't exist.
if field is None:
undefined.append(field_name)
# 更新默认字符串搜索为模糊搜索
if (
isinstance(field, (models.CharField))
and filterset_fields == "__all__"
and lookups == ["exact"]
):
lookups = ["icontains"]
for lookup_expr in lookups:
filter_name = cls.get_filter_name(field_name, lookup_expr)
# If the filter is explicitly declared on the class, skip generation
if filter_name in cls.declared_filters:
filters[filter_name] = cls.declared_filters[filter_name]
continue
if field is not None:
filters[filter_name] = cls.filter_for_field(field, field_name, lookup_expr)
# Allow Meta.fields to contain declared filters *only* when a list/tuple
if isinstance(cls._meta.fields, (list, tuple)):
undefined = [f for f in undefined if f not in cls.declared_filters]
if undefined:
raise TypeError(
"'Meta.fields' must not contain non-model field names: %s" % ", ".join(undefined)
)
# Add in declared filters. This is necessary since we don't enforce adding
# declared filters to the 'Meta.fields' option
filters.update(cls.declared_filters)
return filters
class Meta(MetaBase):
model = queryset.model
fields = filterset_fields
return AutoFilterSet
return None
def filter_queryset(self, request, queryset, view):
filterset = self.get_filterset(request, queryset, view)
if filterset is None:
return queryset
if filterset.__class__.__name__ == "AutoFilterSet":
queryset = filterset.queryset
filter_fields = filterset.filters if self.filter_fields == "__all__" else self.filter_fields
orm_lookup_dict = dict(
zip(
[field for field in filter_fields],
[filterset.filters[lookup].lookup_expr for lookup in filterset.filters.keys()],
)
)
orm_lookups = [
self.construct_search(lookup, lookup_expr) for lookup, lookup_expr in orm_lookup_dict.items()
]
# print(orm_lookups)
conditions = []
queries = []
for search_term_key in filterset.data.keys():
orm_lookup = self.find_filter_lookups(orm_lookups, search_term_key)
if not orm_lookup or filterset.data.get(search_term_key) == '':
continue
filterset_data_len = len(filterset.data.getlist(search_term_key))
if filterset_data_len == 1:
query = Q(**{orm_lookup: filterset.data[search_term_key]})
queries.append(query)
elif filterset_data_len == 2:
orm_lookup += '__range'
query = Q(**{orm_lookup: filterset.data.getlist(search_term_key)})
queries.append(query)
if len(queries) > 0:
conditions.append(reduce(operator.and_, queries))
queryset = queryset.filter(reduce(operator.and_, conditions))
return queryset
else:
return queryset
if not filterset.is_valid() and self.raise_exception:
raise utils.translate_validation(filterset.errors)
return filterset.qs
