DISTINCT ON fields is not supported by this database backend

Question

I am using distinct to get the distinct latest values but it is giving me an error:

DISTINCT ON fields is not supported by this database backend

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Answer 1

distinct('field_name') is not supported in MySQL. It only support distinct(). distinct('field_name') will only work on PostgresSQL. For more details, please check the documentation.

Examples (those after the first will only work on PostgreSQL):(Copy Pasted from Documentation:)

>>> Author.objects.distinct() 
   [...]

>>> Entry.objects.order_by('pub_date').distinct('pub_date')
   [...]

>>> Entry.objects.order_by('blog').distinct('blog')
   [...]

>>> Entry.objects.order_by('author', 'pub_date').distinct('author', 'pub_date')
   [...]

>>> Entry.objects.order_by('blog__name', 'mod_date').distinct('blog__name', 'mod_date')
   [...]

>>> Entry.objects.order_by('author', 'pub_date').distinct('author')
   [...]