rails/activerecord/CHANGELOG.md

• Handle aliased attributes in ActiveRecord::Relation.

  When using symbol keys, ActiveRecord will now translate aliased attribute names to the actual column name used in the database:

  With the model

  class Topic
    alias_attribute :heading, :title
  end
  

  The call

  Topic.where(heading: 'The First Topic')
  

  should yield the same result as

  Topic.where(title: 'The First Topic')
  

  This also applies to ActiveRecord::Relation::Calculations calls such as Model.sum(:aliased) and Model.pluck(:aliased).

  This will not work with SQL fragment strings like Model.sum('DISTINCT aliased').

  Godfrey Chan

• Mute psql output when running rake db:schema:load.

  Godfrey Chan

• Trigger a save on has_one association=(associate) when the associate contents have changed.

  Fix #8856.

  Chris Thompson

• Abort a rake task when missing db/structure.sql like db:schema:load task.

  kennyj

• rake:db:test:prepare falls back to original environment after execution.

  Slava Markevich

Please check 4-0-stable for previous changes.