ruby on rails - How to prefill ActiveAdmin form value from another model? -


in following code, how 1 populate prefilled form field value model activeadmin form:

activeadmin.register person    index     column :forename     column :surname     column :code |p|       mycode.find_by_person_id(p.id).code     end     column :updated_at     default_actions   end    filter :forename   filter :surname    form |f|     f.inputs "person"       f.input :forename       f.input :surname       # how value here, e.g. mycode.find_by_person_id(p.id).code above       #f.input :code, :input_html => { :value => value??? }, as: :hidden     end     f.actions   end end

as nistvan commented above, has_one relationship fetches related object form object, problem solved with: 

activeadmin.register person    index     column :forename     column :surname     column :code |p|       mycode.find_by_person_id(p.id).code     end     column :updated_at     default_actions   end    filter :forename   filter :surname    form |f|     f.inputs "person"       f.input :forename       f.input :surname       f.input :code, :input_html => { :value => f.object.my_code.code }, as: :hidden     end     f.actions   end end

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