- When Account model is queried with Account.objects, it always add
.select_related('cofprofile_user', 'negative').
- Eg benefits: history doesn't do anymore one request by account to
fill the account filter.
Important
Using this workaround (systemically append select_related) can be
dangerous normally, however a certain number of properties in
cofprofile and user are frequently used (as firstname or lastname), and
the benefits seems greater.
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