python - DISTINCT ON in django -

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this question has answer here:

how following query:

ordernotes.objects.filter(item=item).distinct('shared_note')

basically, need ordernotes items, distinct on shared_note. when try , get:

    raise notimplementederror('distinct on fields not supported database backend')  notimplementederror: distinct on fields not supported database backend

i using mysql , cannot change db here. workaround in django?

ordernotes.objects.filter(item=item).values_list('shared_note', flat=true).distinct()

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