In Python 3:
* various builtins and dict methods were changed to return
view/iterable objects rather than lists
* and the separate Python 2 view/iterable builtins and methods were
removed altogether
This is problematic when using these items as list (which the happens
repeatedly in Odoo), but more viciously when iterating *multiple times*
over them (which also happens, which I've messed up multiple times while
writing this, and which is a pain to debug even when you've just created
the issue).
Convert all code using these to semantics-matching cross-version
helper functions to get the LCD behaviour between P2 and P3, and
forbid the builtins via lint.
issue #8530
Since we only uses date fields in accounting, it does not have any sense to have a datetime for currency rate:
- it is error prone for the users as the timezone they're in will affect the rate (and possibly take yesterday's rate).
- it involved the possibility to create several rates per day, which was not fully supported and might give undeterministic results (so we also add a constraint in order to only have one rate per day)
xmo-odoo