You can get the QuerySet with:

You should make a category model like this:

class Category(models.Model):

name = models.CharField(max_length=255, unique=True)

class Blog(DateTimeModel):

title = models.CharField(max_length=255)

description = models.TextField()

category = models.ForeignKey(Category, null=True)

Then you can annotate the Category objects, like:

from django.db.models import Count

Category.objects.annotate(

blog_count=Count('blog')

)