Bug:
Platinum users get this error when commenting:
No route matches {:action=>"show", :controller=>"posts", :id=>nil}
missing required keys: [:id]
Fix:
The issue was that `CurrentUser.role` was nil for Platinum users, which
caused `Comment.create(create_params, :as => CurrentUser.role)` to
silently ignore the create_params because the nil role wasn't in the
attr_accessible whitelist.
Despite this, things worked accidentally for other models because they
had `attr_accessible ..., :as => [:default]` in their whitelists where
the comment model didn't.
d2e9ff363b