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# -*- coding: utf-8 -*-
#
from rest_framework import filters
from rest_framework.fields import DateTimeField
from rest_framework.serializers import ValidationError
import logging
__all__ = ["DatetimeRangeFilter"]
class DatetimeRangeFilter(filters.BaseFilterBackend):
def filter_queryset(self, request, queryset, view):
if not hasattr(view, 'date_range_filter_fields'):
return queryset
try:
fields = dict(view.date_range_filter_fields)
except ValueError:
msg = "View {} datetime_filter_fields set is error".format(view.name)
logging.error(msg)
return queryset
kwargs = {}
for attr, date_range_keyword in fields.items():
if len(date_range_keyword) != 2:
continue
for i, v in enumerate(date_range_keyword):
value = request.query_params.get(v)
if not value:
continue
try:
field = DateTimeField()
value = field.to_internal_value(value)
if i == 0:
lookup = "__gte"
else:
lookup = "__lte"
kwargs[attr+lookup] = value
except ValidationError as e:
print(e)
continue
if kwargs:
queryset = queryset.filter(**kwargs)
return queryset