goutomroy/medium_django_db_optimization_f_expression.py

## medium_django_db_optimization_f_expression.py
# Don't
for entry in Entry.objects.all():
    entry.likes += 1
    entry.save()

# Do
Entry.objects.update(likes=F('likes') + 1)
	# Don't
	for entry in Entry.objects.all():
	entry.likes += 1
	entry.save()

	# Do
	Entry.objects.update(likes=F('likes') + 1)