ruby - How do i work with nested model attributes in refinerycms? -

i have seen http://railscasts.com/episodes/196-nested-model-form-revised , tried same doing refinery engine, not able see nested fields in form while adding record admin section , not getting errors. unable figure out happening or may if missing refinery related configuration thing.

i tried on rails console:

 refinery::extension::model.nested_attributes_options  => {:nested_model_name=>{:allow_destroy=>false, :update_only=>false}} 

i have 2 models question , option, while submitting form question options nested elements giving me error below

  activemodel::massassignmentsecurity::error in  refinery::papers::admin::questionscontroller#create 

can't mass-assign protected attributes: refinery_papers_options

request

parameters:

{"utf8"=>"✓", "authenticity_token"=>"tql+r60r05+mevhpbxppipvl+x3znx+3dcwothfbn/y=", "question"=>{"content"=>"

aaaaaaaaaa

", "correct_answers"=>"a", "refinery_papers_options"=>{"content"=>"

asdfghjklkmnv

", "_destroy"=>"0"}, "position"=>0}, "locale"=>:en}

my models , view are:

question model:

    module refinery      module papers      class question < refinery::core::basemodel        self.table_name = 'refinery_papers_questions'        attr_accessible :content, :correct_answers, :options_attributes, :position        validates :content, :presence => true, :uniqueness => true        has_many :options,         :foreign_key => "refinery_papers_question_id",         :class_name => "refinery::papers::option",         :dependent => :destroy        accepts_nested_attributes_for :options,         :allow_destroy => true      end   end end   option model:      module refinery        module papers          class option < refinery::core::basemodel             self.table_name = 'refinery_papers_options'             attr_accessible :content, :position, :refinery_papers_question_id             validates :content, :presence => true             belongs_to :question,             :class_name => 'refinery::papers::question',             :foreign_key => :refinery_papers_question_id            end         end       end 

in views form nested fields :

<%= f.fields_for :refinery_papers_options |option_form| %>    <div class='field'>      <%= option_form.label :content, "option" %><br/>      <%= option_form.text_area :content, :class => "wymeditor widest" %><br/>     </div>    <div class='field'>      <%= option_form.label :_destroy, "remove option" -%>      <%= option_form.check_box :_destroy -%>        </div>  <% end %> 

when tried on rails console got stack

2.0.0p247 :007 > refinery::papers::question.create({"content"=>"

jhsdacnlks

","correct_answers"=>"a", :refinery_papers_options => {"content"=>"

sjdfgczdj

"}}) activemodel::massassignmentsecurity::error: can't mass-assign protected attributes: refinery_papers_options /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/activemodel-3.2.14/lib/active_model/mass_assignment_security/sanitizer.rb:48:in process_removed_attributes' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/activemodel-3.2.14/lib/active_model/mass_assignment_security/sanitizer.rb:20:in debug_protected_attribute_removal' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/activemodel-3.2.14/lib/active_model/mass_assignment_security/sanitizer.rb:12:in sanitize' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/activemodel-3.2.14/lib/active_model/mass_assignment_security.rb:230:in sanitize_for_mass_assignment' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/activerecord-3.2.14/lib/active_record/attribute_assignment.rb:75:in assign_attributes' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/activerecord-3.2.14/lib/active_record/base.rb:498:in initialize' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/activerecord-3.2.14/lib/active_record/persistence.rb:44:in new' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/activerecord-3.2.14/lib/active_record/persistence.rb:44:in create' (irb):7 /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/railties-3.2.14/lib/rails/commands/console.rb:47:in start' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/railties-3.2.14/lib/rails/commands/console.rb:8:instart' /home/vivek/.rvm/gems/ruby-2.0.0-p247@refinery/gems/railties-3.2.14/lib/rails/commands.rb:41:in <top (required)>' script/rails:6:inrequire' script/rails:6:in `'

may link can help.

 has_many :parts,          :foreign_key => :refinery_page_id,          :class_name => '::refinery::pagepart',          :order => 'position asc',          :inverse_of => :page,          :dependent => :destroy,          :include => ((:translations) if ::refinery::pagepart.respond_to?(:translation_class))  accepts_nested_attributes_for :parts, :allow_destroy => true 

there may confusion regarding class names of different models have created in engine. above code piece of example how refinery core team have done nested attributes concept.