Merge pull request #1 from Weezevent/master

Update from Julien
* add params for findby
Signed-off-by:T.ED <t.erembertdubal@weezevent.com>
* step to relation between primary
Signed-off-by:T.ED <t.erembertdubal@weezevent.com>
* mid dev
Signed-off-by:T.ED <t.erembertdubal@weezevent.com>
* update visibility of primary key
* recursive save
Merge pull request #1 from teddy-dubal/master

* improvement