Count number of records by date in Django

Question

I have a model similar to the following:

class Review(models.Model):
    venue = models.ForeignKey(Venue, db_index=True)
    review = models.TextField()  
           


        

Answer 1

Also you can define custom function:

from django.db.models.expressions import Func

# create custom sql function
class ExtractDateFunction(Func):
    function = "DATE" # thats the name of function, the way it mapped to sql

# pass this function to annotate
Review.objects.filter(venue__pk=2)
      .annotate(date_created=ExtractDateFunction("datetime_created"))
      .values('date_created')
      .annotate(created_count=Count('id'))

Just make sure that your DB engine supports DATE function