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# coding: utf-8
from django.db import models
from django.http import JsonResponse
from django.utils.timezone import now
from django.utils.translation import ugettext_lazy as _
class NoDeleteQuerySet(models.query.QuerySet):
def delete(self):
return self.update(is_discard=True, discard_time=now())
class NoDeleteManager(models.Manager):
def get_all(self):
return NoDeleteQuerySet(self.model, using=self._db)
def get_queryset(self):
return NoDeleteQuerySet(self.model, using=self._db).filter(is_discard=False)
def get_deleted(self):
return NoDeleteQuerySet(self.model, using=self._db).filter(is_discard=True)
class NoDeleteModelMixin(models.Model):
is_discard = models.BooleanField(verbose_name=_("is discard"), default=False)
discard_time = models.DateTimeField(verbose_name=_("discard time"), null=True, blank=True)
objects = NoDeleteManager()
class Meta:
abstract = True
def delete(self):
self.is_discard = True
self.discard_time = now()
return self.save()
class JSONResponseMixin(object):
"""JSON mixin"""
@staticmethod
def render_json_response(context):
return JsonResponse(context)
class IDInFilterMixin(object):
def filter_queryset(self, queryset):
id_list = self.request.query_params.get('id__in')
if id_list:
import json
try:
ids = json.loads(id_list)
except Exception as e:
return queryset
if isinstance(ids, list):
queryset = queryset.filter(id__in=ids)
return queryset