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susmithagudapati/annotation.py

Created April 29, 2020 19:10
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annotation.py
# usage of annotation
# annotates number of attributes to each product.
products = Product.objects.annotate(number_of_attributes=Count('attributes'))
products[0].number_of_attributes
4
# the other way to define
products = Product.objects.annotate(Count('attributes'))
products[0].attributes__count
4
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