from django.db import models
from django.utils import timezone


class TimeStampedModel(models.Model):
    """Abstract base class with created/updated timestamps."""

from django import template
from django.db.models import Count
from blog.models import Post, Tag

register = template.Library()

from rest_framework import serializers
from .models import Author, Book


class BookSerializer(serializers.ModelSerializer):
    class Meta:

from django.db import transaction
from django.shortcuts import get_object_or_404
from rest_framework import status
from rest_framework.decorators import api_view
from rest_framework.response import Response
from .models import Order, OrderItem, Product

from django.core.cache import cache
from django.views.decorators.cache import cache_page
from django.utils.decorators import method_decorator
from django.views.generic import ListView, DetailView
from .models import Post

import factory
from factory.django import DjangoModelFactory
from factory import Faker, SubFactory, post_generation
from blog.models import Post, Comment, Tag
from django.contrib.auth import get_user_model

from celery import shared_task
from django.core.mail import send_mail
from django.contrib.auth import get_user_model

User = get_user_model()

from rest_framework.pagination import PageNumberPagination, CursorPagination


class StandardResultsSetPagination(PageNumberPagination):
    page_size = 25
    page_size_query_param = 'page_size'

from django.db import models
from django.utils import timezone


class PostQuerySet(models.QuerySet):
    def published(self):

from django import forms
from .models import Event


class EventForm(forms.ModelForm):
    class Meta:

from django.core.exceptions import PermissionDenied


class UserOwnershipMixin:
    """Ensure the object belongs to the current user."""

import logging
import time

logger = logging.getLogger(__name__)