django-multiselectfield

django-multiselectfield adds a MultiSelectField to Django models and forms, letting a single field hold several values chosen from a fixed list of choices. Selections are persisted as a comma-separated string in an ordinary CharField, so no extra tables or many-to-many relations are required for simple multi-choice data.

The field integrates with Django forms via a checkbox-style widget, supports per-choice validation, minimum and maximum selection limits, and renders human-readable labels in templates and the admin. It is a lightweight drop-in for cases where a full relational model would be overkill.

What You Get

• A MultiSelectField model field that persists multiple choices as comma-separated values in a CharField.
• A matching form field and checkbox widget that renders the available choices for selection.
• Validation hooks including min_choices and max_choices to constrain how many options a user may pick.
• Human-readable rendering of selected values in templates and the Django admin.

Common Use Cases

• Capturing several tags, categories, or feature flags on a model without a many-to-many relation.
• Building forms where users tick multiple options from a fixed, rarely-changing list.
• Storing weekday, permission, or preference sets where a relational table would be overkill.

Under The Hood

Architecture - The package centers on multiselectfield/db/fields.py, where MultiSelectField subclasses Django’s CharField and overrides value serialization to join selected choices into a comma-separated string on save and split them back into a list on load via a custom MSFList type. A companion forms.py defines the MultiSelectFormField and a checkbox-based widget, and MSFList/get_max_length helpers coerce and validate values. Tech Stack - Pure Python targeting the Django ORM and forms framework, with no third-party runtime dependencies; it supports the Django and Python versions declared in setup.py and is tested via a tox.ini matrix and an example/ project. Code Quality - The codebase is small and focused, ships an example Django project plus a test suite exercised across Django versions in CI, and follows Django’s field API conventions; validation logic for min/max choices lives alongside the field. API Design - Usage mirrors a normal Django field: declare MultiSelectField(choices=..., max_choices=...) on a model and it behaves like other fields in forms, migrations, and the admin, keeping the learning curve minimal for Django developers.