from django.db import models
from django.db.models import Count
-from django.db.models.functions import ExtractYear, ExtractMonth
+from django.db.models.functions import ExtractYear, ExtractMonth, Coalesce
from django.db.models.signals import pre_save
from django.dispatch import receiver
class NoteManager(models.Manager):
def all_published(self):
- return super().get_queryset().filter(status=1)
+ return super().get_queryset().filter(status=1).annotate(publication_date=Coalesce('published_at', 'created_at')).order_by('-publication_date')
- def all_with_unpublished(self):
- return super().all()
+ def all(self):
+ return super().all().annotate(publication_date=Coalesce('published_at', 'created_at')).order_by('-publication_date')
def per_year(self, year):
- return self.all_published().filter(created_at__year=year)
+ return self.all_published().filter(publication_date__year=year)
def per_month(self, year, month):
- return self.per_year(year).filter(created_at__month=month)
+ return self.per_year(year).filter(publication_date__month=month)
def years(self):
- return self.all_published().annotate(created_year=ExtractYear('created_at')).values_list('created_year', flat=True).distinct().order_by('created_year')
+ return self.all_published().annotate(published_year=ExtractYear('publication_date')).values_list('published_year', flat=True).distinct().order_by('published_year')
def years_with_total(self):
- return self.all_published().annotate(created_year=ExtractYear('created_at')).values('created_year').annotate(total=Count('id')).order_by('created_year').values('created_year', 'total').distinct()
+ return self.all_published().annotate(published_year=ExtractYear('publication_date')).values('published_year').annotate(total=Count('id')).order_by('published_year').values('published_year', 'total').distinct()
def months(self, year):
- return self.per_year(year).annotate(created_month=ExtractMonth('created_at')).values_list('created_month', flat=True).distinct().order_by('created_month')
+ return self.per_year(year).annotate(published_month=ExtractMonth('publication_date')).values_list('published_month', flat=True).distinct().order_by('published_month')
def months_with_total(self, year):
- return self.per_year(year).annotate(created_month=ExtractMonth('created_at')).values('created_month').annotate(total=Count('id')).order_by('created_month').values('created_month', 'total').distinct()
+ return self.per_year(year).annotate(published_month=ExtractMonth('publication_date')).values('published_month').annotate(total=Count('id')).order_by('published_month').values('published_month', 'total').distinct()
class Note(models.Model):
title = models.CharField(max_length=250)
def is_published(self):
return self.status == 1
- def publication_date(self):
- if self.published_at is None:
- return self.created_at
- else:
- return self.published_at
-
@receiver(pre_save, sender=Note)
def note_pre_save(sender, instance, **kwargs):
if instance.pk is None: