*   Support Descending Indexes for MySQL.

    MySQL 8.0.1 and higher supports descending indexes: `DESC` in an index definition is no longer ignored.
    See https://dev.mysql.com/doc/refman/8.0/en/descending-indexes.html.

    *Ryuta Kamizono*

*   Fix inconsistency with changed attributes when overriding AR attribute reader.

    *bogdanvlviv*

*   When calling the dynamic fixture accessor method with no arguments it now returns all fixtures of this type.
    Previously this method always returned an empty array.

    *Kevin McPhillips*


Please check [5-1-stable](https://github.com/rails/rails/blob/5-1-stable/activerecord/CHANGELOG.md) for previous changes.