ruby on rails - Wicked Gem, associated models param is missing -

i have boat model , location model. boat has_one :location, location belongs_to :boat. used wicked gem update models. having issue in boat_steps_controller's #update action.

here boat_steps_controller,

class boatstepscontroller < applicationcontroller     include wicked::wizard       before_action :logged_in_user     steps :model, :pricing, :description, :picture, :overview, :features, :location       def show         @boat = current_user.boats.find(params[:boat_id])     case step     when :location           @location = @boat.build_location      when :picture         @picture = @boat.pictures.new         @pictures = @boat.pictures.all     end         render_wizard      end      def update         @boat = current_user.boats.find(params[:boat_id])         @boat.update(boat_params)     case step     when :picture         @picture.update(picture_params)      when :location          @location.update(location_params)      end         render_wizard @boat       end   private      def boat_params       params.require(:boat).permit(:brand, :year, :model, .....)     end      def picture_params       params.require(:picture).permit(:name, :boat_id, :image)     end      def location_params       params.require(:location).permit(:address, :longitude, :latitude, :formatted_address, :location_type)     end   end 

the problem here that, in #update action, update boat_params in every step. in location, there no boat_params update associated model. have find way either boat id form or put if statement.

here location.html.erb (form wicked gem)

<%= form_for [@boat, @location], url: wizard_path, method: :put |f| %>     <div class="field">         <%= f.label :address %><br>         <%= f.text_field :address,:id => "geocomplete", :value => "ataköy marina, 34140 bakırköy/İstanbul, türkiye" %>      </div>      <div class="field">         <%= f.label :longitude %><br>         <%= f.text_field :longitude, :name => "lng", :readonly => "readonly" %>       </div>      <div class="field">         <%= f.label :latitude %><br>         <%= f.text_field :latitude, :name => "lat", :readonly => "readonly" %>      </div>      <div class="field">         <%= f.label :formatted_address %><br>         <%= f.text_field :formatted_address, :name => "formatted_address",        :readonly => "readonly" %>     </div>      <div class="actions">         <%= f.submit "finish" ,class: "btn btn-primary" %>     </div>  <% end %> 

it should send boat id use [@boat, @location], url becomes, http://localhost:3000/boats/241/boat_steps/location. when post this, error of;

started put "/boats/241/boat_steps/location" ::1 @ 2015-05-12 10:00:21 +0300 processing boatstepscontroller#update html   parameters: {"utf8"=>"✓", "authenticity_token"=>"jjoebsce9wdcumkihevnh9zfeyuu15l5tziknfo9ced7tog0mhq8jqegstq5krdrgnrnxayntqi0fajjhsnggq==", "location"=>{"address"=>"ataköy marina, 34140, bakırköy, İstanbul, türkiye"}, "lng"=>"28.87443200000007", "lat"=>"40.971388", "formatted_address"=>"ataköy marina, 34140 bakırköy/İstanbul, türkiye", "commit"=>"finish", "boat_id"=>"241", "id"=>"location"}   user load (0.2ms)  select  "users".* "users" "users"."id" = ? limit 1  [["id", 1]]   boat load (0.2ms)  select  "boats".* "boats" "boats"."user_id" = ? , "boats"."id" = ? limit 1  [["user_id", 1], ["id", 241]] completed 400 bad request in 51ms  actioncontroller::parametermissing (param missing or value empty: boat):   app/controllers/boat_steps_controller.rb:50:in `boat_params'   app/controllers/boat_steps_controller.rb:25:in `update' 

and when erase @boat.update(boat_params) #update action (which wrong) receive error,

nomethoderror (undefined method `update' nil:nilclass):   app/controllers/boat_steps_controller.rb:32:in `update'  

i put easy else condition as;

def update         @boat = current_user.boats.find(params[:boat_id])     case step     when :picture         @picture.update(picture_params)      when :location         @location = @boat.build_location         @location.update_attributes(address: params[:location][:address], longitude: params[:lng], latitude: params[:lat])     else          @boat.update(boat_params)     end         render_wizard @boat       end