django-pgsql-interval-field

An INTERVAL model field for Django, backed by PostgreSQL's native INTERVAL type (and stored as BIGINT microseconds on other backends). Values are exposed in Python as datetime.timedelta.

Why?

PostgreSQL has a native INTERVAL column type for storing durations, but Django ships no model field that maps to it. IntervalField fills that gap: on PostgreSQL it uses the native INTERVAL type, and on other backends it stores the duration as a BIGINT number of microseconds — so the same model works everywhere while taking advantage of PostgreSQL where available.

Features

• Native PostgreSQL INTERVAL column; BIGINT fallback for other backends (MySQL, SQLite, …)
• Maps to datetime.timedelta
• Configurable form widget with per-unit inputs (days/hours/minutes/seconds/ microseconds) plus min_value / max_value validation
• Internationalized (ships Polish and German translations)
• Optional Dojango widget support
• Example/test Django project included

Supported versions

Tested in CI against these Django × Python combinations:

Django	3.10	3.11	3.12	3.13	3.14
5.2 LTS	✓	✓	✓	✓	✓
6.0	—	—	✓	✓	✓
6.1	—	—	✓	✓	✓

Installation

Using uv (recommended)

uv add django-pgsql-interval-field

Using pip

pip install django-pgsql-interval-field

Add "interval" to INSTALLED_APPS to pick up the widget's CSS and the bundled translations.

Quick start

from datetime import timedelta

from django.db import models

from interval.fields import IntervalField


class Meeting(models.Model):
    # Stored as PostgreSQL INTERVAL, or BIGINT microseconds elsewhere.
    duration = IntervalField(default=timedelta(hours=1))

    # Restrict the form widget's units and range.
    break_time = IntervalField(
        format="HMS",
        min_value=timedelta(minutes=5),
        max_value=timedelta(hours=2),
        null=True,
        blank=True,
    )

Assign datetime.timedelta values (or a raw number of microseconds, or a "[D day[s], ]HH:MM:SS[.ffffff]" string); reading the field always returns a timedelta.

License

MIT — see LICENSE for details.