ruby on rails - Blocked using simpleform wrong number of arguments (1 for 0) -

working 2 models: films , categories, , trying setup form films uses association categories prepopulate can found in dropdown. if delete , :collection => category.all(order: 'prototype'), prompt: "choose category" films/_form, see 'prototype' field of categories not correctly rendered , instead see like:

checked out simpleform docs don't find can help. *edited include better link can seen have used suggested in simpleform.

film.rb

  class film < activerecord::base      has_many :categories    end 

category.rb

  class category < activerecord::base      belongs_to :film    end 

films/_form.htm.erb

  <%= simple_form_for @film |f| %>     <%= f.input :title, required: false %>     <%= f.association :categories, :collection => category.all(order: 'prototype'), prompt: "choose category" %>     <%= f.button :submit %>   <% end %> 

categories/_form.htm.erb

  <%= simple_form_for(@category) |f| %>     <%= f.error_notification %>      <div class="form-inputs">       <%= f.input :prototype %>     </div>      <div class="form-actions">       <%= f.button :submit %>     </div>   <% end %> 

trace in terminal

argumenterror - wrong number of arguments (1 0): app/views/films/_form.html.erb:3:in block in _app_views_films__form_html_erb___839547296437048808_70229269835880' actionview (4.2.1) lib/action_view/helpers/capture_helper.rb:38:inblock in capture' actionview (4.2.1) lib/action_view/helpers/capture_helper.rb:200:in `with_output_buffer'

the simple form docs didn't because problem isn't simple form how you're using active record. of rails 4, no longer pass options all:

company.all(order: 'prototype') 

should be

company.order('prototype')