- Bug #3587: Fixed an issue with storing empty records (cebe)
- Enh #3520: Added `unlinkAll()`-method to active record to remove all records of a model relation (NmDimas, samdark, cebe)
- Enh #3527: Added `highlight` property to Query and ActiveRecord. (Borales)
- Enh #4086: changedAttributes of afterSave Event now contain old values (dizews)
- Enh: Make error messages more readable in HTML output (cebe)
- Chg: asArray in ActiveQuery is now equal to using the normal Query. This means, that the output structure has changed and `with` is supported anymore. (cebe)
- Chg: Deletion of a record is now also considered successful if the record did not exist. (cebe)
- Bug #3668: Escaping of the special characters at 'MATCH' statement added (klimov-paul)
- Bug #4018: AR relation eager loading does not work with db models (klimov-paul)
- Enh: Added support for using sub-queries when building a DB query with `IN` condition (qiangxue)
- Enh #3520: Added `unlinkAll()`-method to active record to remove all records of a model relation (NmDimas, samdark, cebe)
- Enh #4086: changedAttributes of afterSave Event now contain old values (dizews)
- Enh: Added support for using sub-queries when building a DB query with `IN` condition (qiangxue)
- Chg #2287: Split `yii\sphinx\ColumnSchema::typecast()` into two methods `phpTypecast()` and `dbTypecast()` to allow specifying PDO type explicitly (cebe)
- Added note about the fact that intl is required for non-latin languages to requirements checker.
- Enh #4028: Added ability to `yii\widgets\Menu` to encode each item's label separately (creocoder, umneeq)
- Enh #4080: Added proper handling and support of the symlinked directories in `FileHelper`, added $options parameter in `FileHelper::removeDirectory()` (resurtm)
- Enh #4086: changedAttributes of AfterSaveEvent contain an old values (dizews)
- Enh #4086: changedAttributes of afterSave Event now contain old values (dizews)
- Enh: Added support for using sub-queries when building a DB query with `IN` condition (qiangxue)
- Enh: Supported adding a new response formatter without the need to reconfigure existing formatters (qiangxue)
- Enh: Added `yii\web\UrlManager::addRules()` to simplify adding new URL rules (qiangxue)