belongs to - rails admin making a dropdown for on option -


hi im trying make 1 of fields in rails admin show ror project im trying make drop down menu gets name 1 of tables have made show it. products ptype show models how can this? , thanks

this codes

class product < activerecord::base has_many :ptypes rails_admin edit     field :name     field :ptype, :belongs_to_association     field :body, :ck_editor     field :value     end     end end   class ptype < activerecord::base  belongs_to :products    rails_admin      edit        field :name     end     end  end

this error shows

undefined method `[]' nil:nilclass   request parameters: {"model_name"=>"product"}

also thanks!


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