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

Question

I have a Boat model and Location Model. Boat has_one :location, Location belongs_to :boat. I used wicked gem to update the models. But I am having an issue in boat_steps_controller's #update action.
Here is my 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 is that, in #update action, I update boat_params in every step. But in Location, there is no boat_params to update as it is a associated model. So I have to find a way either get the boat id from the form or put if statement.
Here is the location.html.erb (form for wicked gem)
<%= form_for [#boat, #location], url: wizard_path, method: :put do |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 normally send boat id as I use [#boat, #location], the url becomes, http://localhost:3000/boats/241/boat_steps/location. But when I post this, I get an error of;
Started PUT "/boats/241/boat_steps/location" for ::1 at 2015-05-12 10:00:21 +0300
Processing by BoatStepsController#update as 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".* FROM "users" WHERE "users"."id" = ? LIMIT 1 [["id", 1]]
Boat Load (0.2ms) SELECT "boats".* FROM "boats" WHERE "boats"."user_id" = ? AND "boats"."id" = ? LIMIT 1 [["user_id", 1], ["id", 241]]
Completed 400 Bad Request in 51ms
ActionController::ParameterMissing (param is missing or the value is empty: boat):
app/controllers/boat_steps_controller.rb:50:in `boat_params'
app/controllers/boat_steps_controller.rb:25:in `update'
And when I erase #boat.update(boat_params) from #update action (which is wrong) but then I receive an error,
NoMethodError (undefined method `update' for nil:NilClass):
app/controllers/boat_steps_controller.rb:32:in `update'

Answer 1

I just put an 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