Django 2.2.7 版本发行说明

漏洞修复

• Fixed a crash when using a contains, contained_by, has_key, has_keys, or has_any_keys lookup on django.contrib.postgres.fields.JSONField, if the right or left hand side of an expression is a key transform (#30826).
• Prevented migrate --plan from showing that RunPython operations are irreversible when reverse_code callables don't have docstrings or when showing a forward migration plan (#30870).
• Fixed migrations crash on PostgreSQL when adding an Index with fields ordering and opclasses (#30903).
• Restored the ability to override get_FOO_display() (#30931).