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Added imports to docs/topics/db/aggregation.txt example.

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MariKiev 2016-05-14 17:16:55 +07:00 committed by Tim Graham
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docs/topics/db/aggregation.txt
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@ -68,6 +68,7 @@ In a hurry? Here's how to do common aggregate queries, assuming the models above
{'price__max': Decimal('81.20')} {'price__max': Decimal('81.20')}
# Cost per page # Cost per page
>>> from django.db.models import F, FloatField, Sum
>>> Book.objects.all().aggregate( >>> Book.objects.all().aggregate(
... price_per_page=Sum(F('price')/F('pages'), output_field=FloatField())) ... price_per_page=Sum(F('price')/F('pages'), output_field=FloatField()))
{'price_per_page': 0.4470664529184653} {'price_per_page': 0.4470664529184653}