django-better-choices 3.0

Better choices library for Django web framework

Django Better Choices

Better choices library for Django web framework.

Define your choices once, get:

• String values (for DB compatibility) + rich attributes (for app logic).
• Pretty display labels (lazy-translatable).
• Typed access via enum members.
• Subsets (extract/exclude) for forms/admin or feature flags.
• Django-friendly: ModelField(choices=..., default=...).

Requirements

This library was written for Python 3.9+ and may not work in any earlier versions.

Installation

pip install django-better-choices
# or with uv
uv add django-better-choices

Quick start

from django_better_choices import Choices

class Status(Choices):
    # simplest: display only — value is auto-generated as lowercase("name")
    DRAFT = "Draft"

    # explicit wrapper — value auto-generated later
    OPEN = Choices.Value("Open")

    # fully explicit
    CLOSED = Choices.Value("Closed", value="closed-hard", css="badge--red")

    # attach arbitrary params to a choice (become attributes)
    PENDING = Choices.Value("Pending review", level=2, css="badge--yellow")

    # subsets (reusable groups of members)
    PUBLIC = Choices.Subset("OPEN", "CLOSED")

# Use like enum + str
Status.OPEN.value              # "open"
Status.OPEN.display            # "Open"
Status.PENDING.level           # 2
str(Status.OPEN)               # "open"
Status("open") is Status.OPEN  # True
"open" in Status               # True

# For Django model fields:
# choices=Status.choices()  -> [("draft", "Draft"), ("open", "Open"), ...]

Why this instead of plain Enum or Django tuples?

• Single source of truth: define once, get both the DB value (string/bool/int) and the human label.
• Attributes per choice: attach metadata (css, level, ...) right on the member.
• Subsets: build narrow groups (PUBLIC, INTERNAL, ...) or compose at runtime (extract, exclude).
• Typed access: members are enum-like and str-like, so they fit Django fields and your logic.

Usage

Defining values & parameters

1) Implicit values (default)

If you pass a string, it’s treated as display. The stored value is the lower-cased member name.

class Example(Choices):
    FOO = "Foo"
    BAR = "Bar"

Example.FOO.value    # "foo"
Example.FOO.display  # "Foo"

2) Choices.Value(display, *, value=_auto, **params)

• display: what users see (may be lazy _("Text")).
• value: hashable value (string/bool/int). By default, auto-generated from the member name.
• params: any extra attributes you want to access later.

class Example(Choices):
    A = Choices.Value("Alpha", slug="alpha", css="badge")
    B = Choices.Value("Beta", value=True, risk=5)
    C = Choices.Value("Gamma", value=7)

Example.A.slug   # "alpha"
Example.B.value  # True
Example.C.value  # 7

3) Custom value factory (optional)

Override _choices_value_factory_ to control auto values.

class Example(Choices):
    _choices_value_factory_ = staticmethod(lambda name, **_: name.upper())

    ALPHA = "Alpha"

Example.ALPHA.value  # "ALPHA"

Subsets

Create named subsets on the class:

class Status(Choices):
    OPEN = "Open"
    CLOSED = "Closed"
    ARCHIVED = "Archived"

    ACTIVE = Choices.Subset("OPEN", "CLOSED")

Or ad-hoc at runtime:

Status.extract("OPEN", "CLOSED")   # -> new Choices subclass "Status.Subset"
Status.exclude("ARCHIVED")         # -> everything but ARCHIVED

Subsets are full Choices classes themselves:

subset = Status.ACTIVE
list(subset)            # [Status.OPEN, Status.CLOSED]
subset.choices()        # [("open", "Open"), ("closed", "Closed")]
repr(subset)            # "<choices 'Status.ACTIVE'>"

Django integration

Model fields

from django.db import models

class Ticket(models.Model):
    class Status(Choices):
        OPEN = "Open"
        CLOSED = Choices.Value("Closed", css="badge--red")

    status = models.CharField(
        max_length=20,
        choices=Status.choices(),
        default=Status.OPEN,   # can pass the member (stores its .value)
    )

Forms/admin

from django import forms

class TicketForm(forms.ModelForm):
    class Meta:
        model = Ticket
        fields = ["status"]
        widgets = {
            "status": forms.Select(choices=Ticket.Status.ACTIVE.choices())
        }

i18n (optional)

from django.utils.translation import gettext_lazy as _

class Color(Choices):
    RED = _("Red")
    GREEN = Choices.Value(_("Green"), css="green")

display accepts Django’s lazy Promise, so translation resolves at render time.

Type hints

• The package ships with type annotations.
• Members are both Enum and str (subclass), so tools like mypy/pyright see them as string-like values with extra attributes.

Testing

uv sync --dev
uv run pytest -q

With coverage 100% enforced:

uv run pytest --cov

Contributing

• Issues and PRs welcome.
• Please run ruff check . --fix and keep tests green with 100% coverage.

License

Library is available under the MIT license. The included LICENSE file describes this in detail.