DataMapper ORM v1.8.0

[eluser]WanWizard[/eluser]
Difference is that the array methods support relations, which means they embed the related object into the array output, where as the json methods only dump the current object. In that respect you could say the json methods need updating.

Problem still is that you only have one $object->created_by, and it can either point to a table column, or to a related object, but not both. So rename your relation or your column name to avoid this issue.