Skip to content


Subversion checkout URL

You can clone with
Download ZIP


accessible_attributes wrong number of arguments (1 for 0) with rails 3.2.5 #419

darragh opened this Issue · 5 comments

2 participants


I've narrowed it down to what goes on in accessible.rb (I guess :accessible_attributes can no longer be a simple class_attribute)

This prevents us upgrading an application using mongo_mapper to rails 3.2.5

.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/activesupport-3.2.5/lib/active_support/core_ext/class/attribute.rb:75:in `accessible_attributes': wrong number of arguments (1 for 0) (ArgumentError)
    from /Users/darragh/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/actionpack-3.2.5/lib/action_controller/metal/params_wrapper.rb:175:in `_set_wrapper_defaults'
    from /Users/darragh/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/actionpack-3.2.5/lib/action_controller/metal/params_wrapper.rb:133:in `inherited'
    from /Users/darragh/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/actionpack-3.2.5/lib/abstract_controller/railties/routes_helpers.rb:7:in `block (2 levels) in with'
    from /Users/darragh/.rbenv/versions/1.9.2-p290/lib/ruby/gems/1.9.1/gems/actionpack-3.2.5/lib/action_controller/railties/paths.rb:7:in `block (2 levels) in with'

I don't have a patch right now.


That stack tace doesn't make things clear, but debugging through it, it happens when the first class including MongoMapper::Document is loaded by our app.

I believe a simple way to reproduce would be to create a new rails 3.2.5 app with mongo_mapper and a single model and try to boot it.


hi darragh,

I can confirm this bug. The error is caused due to this commit:

Looks like it's due to the new role parameter that has been added.


could this be a naming conflict between the Accessible plugins class_attribute :accessible_attributes and the ActiveModel::MassAssignmentSecurity "accessible_attributes" class method?


4d35c67 seems to resolve this


Closing, since master now has a fix for this

@darragh darragh closed this
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Something went wrong with that request. Please try again.