Remove duplicates in a Django query

Question

Is there a simple way to remove duplicates in the following basic query:

email_list = Emails.objects.order_by(\'email\')

I tried using

Answer 1

For checking duplicate you can do a GROUP_BY and HAVING in Django as below. We are using Django annotations here.

from django.db.models import Count
from app.models import Email

duplicate_emails = Email.objects.values('email').annotate(email_count=Count('email')).filter(email_count__gt=1)

Now looping through the above data and deleting all other emails except the first one (depends on requirement or whatever).

for data in duplicates_emails:
    email = data['email']
    Email.objects.filter(email=email).order_by('pk')[1:].delete()