from django.db import models
+from django.db.models import Count
from django.db.models.functions import ExtractYear, ExtractMonth
+from django.db.models.signals import pre_save
+
+from django.dispatch import receiver
from django.contrib.auth.models import User
from django.urls import reverse
+from datetime import datetime
+
# Create your models here.
NOTE_STATUS = ((0, "Draft"),
def years(self):
return super().get_queryset().filter(status=1).annotate(created_year=ExtractYear('created_at')).values_list('created_year', flat=True).distinct().order_by('created_year')
+ def years_with_total(self):
+ return super().get_queryset().filter(status=1).annotate(created_year=ExtractYear('created_at')).values('created_year').annotate(total=Count('id')).order_by('created_year').values('created_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')
+ 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()
+
class Note(models.Model):
title = models.CharField(max_length=250)
slug = models.SlugField(max_length=250, unique=True)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
+ published_at = models.DateTimeField(null=True, editable=False)
objects = NoteManager()
return self.status == 0
def is_published(self):
- return self.status == 1
\ No newline at end of file
+ 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:
+ if instance.status == 1:
+ instance.published_at = datetime.now()
+ else:
+ old_instance = Note.objects.get(pk=instance.pk)
+
+ if old_instance.status == 0 and instance.status == 1:
+ instance.published_at = datetime.now()
\ No newline at end of file