Added a foreign key in migration utils
Added a foreign key in migration utils

no issue

- This makes it easy to add/remove foreign key in both mysql and sqlite

e10/Ghost,TryGhost/Ghost,bitjson/Ghost,ErisDS/Ghost,janvt/Ghost,ErisDS/Ghost,ErisDS/Ghost,TryGhost/Ghost,bitjson/Ghost,e10/Ghost,janvt/Ghost,TryGhost/Ghost