distinct method not working correctly in Django

Question

I want to get distinct pair of quarter and year but following query is giving duplicate pairs

DataValue.objects.values('period_quarter','period_year').distinct()

output:

[
 {
'period_year': '2019',
'period_quarter': 'Q2'
 },
 {
'period_year': '2019',
'period_quarter': 'Q2'
 },
 {
'period_year': '2019',
'period_quarter': 'Q2'
 }
]

Answer 1

From the Docs :

When you specify field names, you must provide an order_by() in the QuerySet, and the fields in order_by() must start with the fields in distinct(), in the same order.

Try:

DataValue.objects.order_by('period_quarter','period_year').distinct('period_quarter','period_year')