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Django 2.2.4 release notes
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*Expected August 1, 2019*

Django 2.2.4 fixes several bugs in 2.2.3.

Bugfixes
========

* Fixed a regression in Django 2.2 when ordering a ``QuerySet.union()``,
  ``intersection()``, or ``difference()`` by a field type present more than
  once results in the wrong ordering being used (:ticket:`30628`).

* Fixed a migration crash on PostgreSQL when adding a check constraint
  with a ``contains`` lookup on
  :class:`~django.contrib.postgres.fields.DateRangeField` or
  :class:`~django.contrib.postgres.fields.DateTimeRangeField`, if the right
  hand side of an expression is the same type (:ticket:`30621`).