Improve `exist` validator to support array attributes
Refactoring
Refactoring
Update config.php
Fix a typo
Added a test.
guide WIP [skip ci]
Tests updated
Tests updated
Add missing Exception when wrong validator is used
MigrateCommand enhancement. `all` option added for `down` action.
CHANGELOG updated
Comments updated
Merge pull request #3420 from Jomaanro/master

Add missing InvalidConfigException when wrong model validator is used
Tests updated
ExistValidator count logic fix
CHANGELOG
CHANGELOG fixed
guide WIP [skip ci]
finished quick start about database [skip ci]