.. index::
   pair: django.contrib.postgres.fields ; RangeBoundary
   ! RangeBoundary

.. _range_boundary:

============================
RangeBoundary() expressions
============================

.. versionadded:: 3.0

.. class:: RangeBoundary(inclusive_lower=True, inclusive_upper=False)

    .. attribute:: inclusive_lower

        If ``True`` (default), the lower bound is inclusive ``'['``, otherwise
        it's exclusive ``'('``.

    .. attribute:: inclusive_upper

        If ``False`` (default), the upper bound is exclusive ``')'``, otherwise
        it's inclusive ``']'``.

A ``RangeBoundary()`` expression represents the range boundaries.

It can be used with a custom range functions that expected boundaries, for example
to define :class:`~django.contrib.postgres.constraints.ExclusionConstraint`.

See `the PostgreSQL documentation for the full details <https://www.postgresql.org/
docs/current/rangetypes.html#RANGETYPES-INCLUSIVITY>`_.