The problemic model: Parked at Loopia
u.profile.observable_artists_as_string
ActiveRecord::StatementInvalid: Mysql::Error: Unknown column 'users.user_id' in'where clause': SELECT observations.* FROM observations INNER JOIN users ON obervations.user_id = users.id WHERE ((users.user_id = 1) AND ((observable_typ='Artist')))
The problem
users.user_id should be observations.user_id
Is it a bug in Rails core?