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Django versions 1.4 and above have prefetch_related for this purpose.
The prefetch_related method is similar to select_related, but does not do a database join. Instead, it executes additional database queries and does the joining in Python.
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If you’re not on Django 1.4, there’s also the django-batch-select library, which works basically the same way as prefetch_related.
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Source:stackexchange.com