### New features

* [#486](https://github.com/rubocop/rubocop-rails/issues/486): Add new `Rails/ExpandedDateRange` cop. ([@koic][])
* [#494](https://github.com/rubocop/rubocop-rails/pull/494): Add new `Rails/UnusedIgnoredColumns` cop. ([@pocke][])
* [#490](https://github.com/rubocop/rubocop-rails/issues/490): Make `Rails/HttpStatus` aware of `head` method. ([@koic][])
* [#483](https://github.com/rubocop/rubocop-rails/pull/483): Add new `Rails/EagerEvaluationLogMessage` cop. ([@aesthetikx][])
* [#495](https://github.com/rubocop/rubocop-rails/issues/495): Add new `Rails/I18nLocaleAssignment` cop. ([@koic][])
* [#497](https://github.com/rubocop/rubocop-rails/issues/497): Add new `Rails/AddColumnIndex` cop. ([@dvandersluis][])

### Bug fixes

* [#482](https://github.com/rubocop/rubocop-rails/pull/482): Fix a false positive for `Rails/RelativeDateConstant` when assigning (hashes/arrays/etc)-containing procs to a constant. ([@jdelStrother][])
* [#419](https://github.com/rubocop/rubocop-rails/issues/419): Fix an error for `Rails/UniqueValidationWithoutIndex` when using a unique index and `check_constraint` that has `nil` first argument. ([@koic][])
* [#70](https://github.com/rubocop/rubocop-rails/issues/70): Fix a false positive for `Rails/TimeZone` when setting `EnforcedStyle: strict` and using `Time.current`. ([@koic][])
* [#488](https://github.com/rubocop/rubocop-rails/issues/488): Fix a false positive for `Rails/ReversibleMigrationMethodDefinition` when using cbase migration class. ([@koic][])
* [#500](https://github.com/rubocop/rubocop-rails/issues/500): Fix a false positive for `Rails/DynamicFindBy` when using dynamic finder with hash argument. ([@koic][])

### Changes

* [#288](https://github.com/rubocop/rubocop-rails/issues/288): Add `AllowToTime` option (`true` by default) to `Rails/Date`. ([@koic][])
* [#499](https://github.com/rubocop/rubocop-rails/issues/499): Add `IgnoreWhereFirst` option (`true` by default) to `Rails/FindBy`. ([@koic][])
* [#505](https://github.com/rubocop/rubocop-rails/pull/505): Set disabled by default for `Rails/EnvironmentVariableAccess`. ([@koic][])

[@koic]: https://github.com/koic
[@pocke]: https://github.com/pocke
[@aesthetikx]: https://github.com/aesthetikx
[@dvandersluis]: https://github.com/dvandersluis
[@jdelStrother]: https://github.com/jdelStrother
