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# coding: utf-8
from django.db import models
from django.http import JsonResponse
from django.utils import timezone
from django.utils.translation import ugettext_lazy as _
class NoDeleteQuerySet(models.query.QuerySet):
def delete(self):
return self.update(is_discard=True, discard_time=timezone.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 = timezone.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):
queryset = super(IDInFilterMixin, self).filter_queryset(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
class BulkSerializerMixin(object):
"""
Become rest_framework_bulk not support uuid as a primary key
so rewrite it. https://github.com/miki725/django-rest-framework-bulk/issues/66
"""
def to_internal_value(self, data):
from rest_framework_bulk import BulkListSerializer
ret = super(BulkSerializerMixin, self).to_internal_value(data)
id_attr = getattr(self.Meta, 'update_lookup_field', 'id')
if self.context.get('view'):
request_method = getattr(getattr(self.context.get('view'), 'request'), 'method', '')
# add update_lookup_field field back to validated data
# since super by default strips out read-only fields
# hence id will no longer be present in validated_data
if all((isinstance(self.root, BulkListSerializer),
id_attr,
request_method in ('PUT', 'PATCH'))):
id_field = self.fields[id_attr]
if data.get("id"):
id_value = id_field.to_internal_value(data.get("id"))
else:
id_value = id_field.to_internal_value(data.get("pk"))
ret[id_attr] = id_value
return ret
class DatetimeSearchMixin:
date_format = '%Y-%m-%d'
date_from = date_to = None
def get_date_range(self):
date_from_s = self.request.GET.get('date_from')
date_to_s = self.request.GET.get('date_to')
if date_from_s:
date_from = timezone.datetime.strptime(date_from_s, self.date_format)
tz = timezone.get_current_timezone()
self.date_from = tz.localize(date_from)
else:
self.date_from = timezone.now() - timezone.timedelta(7)
if date_to_s:
date_to = timezone.datetime.strptime(
date_to_s + ' 23:59:59', self.date_format + ' %H:%M:%S'
)
self.date_to = date_to.replace(
tzinfo=timezone.get_current_timezone()
)
else:
self.date_to = timezone.now()
def get(self, request, *args, **kwargs):
self.get_date_range()
return super().get(request, *args, **kwargs)