queryset = queryset.distinct('article_hash').order_by('article_hash')
queryset = querset.order_by('create_time')

SELECT DISTINCT ON expressions must match initial ORDER BY expressions

queryset = queryset.distinct('article_hash','create_time')
                   .order_by('article_hash', 'create_time')

select distinct on (tb.article_hash, tb.create_time), tb.id
from tb
order by tb.article_hash asc, tb.create_time asc