Django 1.8.6 发布，这是一个 bug 修复版本，更新如下： bug 修复 Fixed a regression causing ModelChoiceField to ignoreprefetch_related() on its queryset (#25496). Allowed “mode=memory” in SQLite test database name if supported (#12118). Fixed system check crash on ForeignKey to abstract model (#25503). Fixed incorrect queries when you have multiple ManyToManyFields on different models that have the same field name, point to the same model, and have their reverse relations disabled (#25545). Allowed filtering over a RawSQL annotation (#25506). Made the Concat database function idempotent on SQLite (#25517). Avoided a confusing stack trace when starting runserver with an invalid INSTALLED_APPS setting (#25510). This regression appeared in 1.8.5 as a side effect of fixing #24704. Made deferred models use their proxied model’s _meta.apps for caching and retrieval (#25563). This prevents any models generated in data migrations using QuerySet.defer() from leaking to test and application code. Fixed a typo in the name of thestrictly_abovePostGIS lookup (#25592). Fixed crash with contrib.postgres.forms.SplitArrayField andIntegerField on invalid value (#25597). Added a helpful error message when Django and South migrations exist in the same directory (#25618). Fixed a regression in URLValidator that allowed URLs with consecutive dots in the domain section (like http://example..com/) to pass (#25620). Fixed a crash with GenericRelation andBaseModelAdmin.to_field_allowed (#25622). 详情请看 发行说明。 下载地址：1.8.6，downloads Django 1.8.6 发布，bug 修复版本下载地址
