#31261: Add support for defining Enum fields with dict, tuple, set and list
values
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Reporter: Tom | Owner: nobody
Forbes |
Type: New | Status: new
feature |
Component: Database | Version: master
layer (models, ORM) |
Severity: Normal | Keywords:
Triage Stage: | Has patch: 0
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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As per the discussion on this forum post:
https://forum.djangoproject.com/t/moving-to-django-3-0s-field-choices-
enumeration-types/970/8
It would be good to support two fairly common use cases with Enums:
defining groups of related values (groups), and defining grouping for use
with specific widgets.
One way to enable both of these would be to simply special-case enum
values with `dict`, `tuple`, `set` and `list` values:
{{{
class MoonMissions(Enum):
APOLLO_10 = 1
APOLLO_11 = 2
EXPLORER_33 = 3
FAILED_MISSIONS = {EXPLORER_33}
SUCCESSFUL_MISSIONS = (APOLLO_10, APOLLO_11)
SUCCESS_GROUPING = {
"Failed": FAILED_MISSIONS,
"Successful": SUCCESSFUL_MISSIONS
}
COUNTRY_GROUPING = [
["USA", [APOLLO_10, APOLLO_11, EXPLORER_33]]
]
}}}
Now a user can do:
{{{
SomeModel.objects.filter(mission__in=MoonMissions.FAILED_MISSIONS)
enum_form_field.value in MoonMissions.SUCCESSFUL_MISSIONS
models.IntegerField(choices=MoonMissions.COUNTRY_GROUPING)
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/31261>
Django <https://code.djangoproject.com/>
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