django-admin-cookbook | Django admin cookbook is a set recipes | SQL Database library
kandi X-RAY | django-admin-cookbook Summary
kandi X-RAY | django-admin-cookbook Summary
Django admin cookbook is a set of recipes of how to do things with Django. They take the form of about 50 questions of the form How to do X with Django admin. We have a set of models which we use across the book for answering these questions.
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Top functions reviewed by kandi - BETA
- Returns a list of the apps contained in the request .
- Export the queryset as csv
- Returns a queryset filtered queryset .
- Determine whether or not the user should respond .
- Setup the application .
- Return name .
- Return a label for the given instance .
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Trending Discussions on django-admin-cookbook
QUESTION
I'm learning Django and I got stuck on this problem
I'm basically trying to order by a computed field in an admin panel view, I've read some "tutorials" like this: https://books.agiliq.com/projects/django-admin-cookbook/en/latest/sorting_calculated_fields.html on google but I can't seem to figure out how it all works (between annotations etc)
Here's my classes:
...ANSWER
Answered 2022-Jan-11 at 20:28You can not use methods to annotate a Queryset
. You should specify an expression constructed an expression for the database. You can not use a method for that. You can make use of combinations of F
-expressions together with certain aggregates, etc.
Here both the current_pretax_yield
and current_aftertax_yield
scale with coupon_amount/last_price
, so we can make an annotation, and then sort by that annotation:
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