How do i solve No route matches

Question

Hi guys in my index view page, i'm having this error in this line :

<td id="change"><%= link_to 'Analyze',user_generator_path(current_user.generators)%></td>

The code for that line is :

        <% if generator.result.present?%>
            <td>               <%= generator.result.ncbi_ref_seq %></td>
            <td>               <%= generator.result.genome_sample %></td>
            <td align="center"><%= generator.result.binding_times %></td>
            <td id="change"></td>
            <td id="change"><%= link_to 'Delete', generator, method: :delete, data: { confirm: 'Are you sure?' } %></td>
        <% else %>
            <td></td>
            <td></td>
            <td></td>
            <td id="change"><%= link_to 'Analyze',user_generator_path(current_user.generators)%></td>
            <td id="change"><%= link_to 'Delete', generator, method: :delete, data: { confirm: 'Are you sure?' } %></td>
        <% end %>

I'm getting

No route matches {:action=>"show", :controller=>"generators", :user_id=>#<ActiveRecord::Associations::CollectionProxy [#<Generator id: 1, primer_length: 20, no_A: nil, no_T: nil, no_G: nil, no_C: nil, melting_temp: nil, choice: nil, random_primer_generated: nil, user_seq: nil, f_primer: nil, r_primer: nil, result_choice: nil, user_id: 1, created_at: "2013-12-09 09:27:39", updated_at: "2013-12-09 09:27:39">]>, :id=>nil, :format=>nil} missing required keys: [:id]

Generator.rb

def new
    @generator = current_user.generators.build(params[:generator])
  end

def create    
    @generator = current_user.generators.build(params[:generator])
    @generator.user_id = current_user.id if current_user
    @generator.choice = params[:choice]
      if params[:choice] == 'Randomly'
          @generator.random_generate(generator_params)
      elsif params[:choice] == 'Specified ATGC'
          @generator.specified_ATGC(params[:no_A],params[:no_T],params[:no_G],params[:no_C])
      elsif params[:choice] == 'Seating'
          @generator.seating(params[:user_seq])
      end

    @generator.result_choice=params[:result_choice]
    @generator.save
    respond_to do |format|
       if @generator.result_choice == 'Yes'
              format.html { redirect_to(user_generator_path(@generator)) }
       else
              format.html { redirect_to(user_generators_path(@generator) ) }
       end
     end 

  end

How do i fix it ? i just want to display user's generators. if there's result, then user.generators.result

Route.rb

root :to => 'welcome#index' 
  get '/auth/:provider/callback' => 'sessions#create' 
  post '/auth/identity/callback' => 'sessions#create'

  resources :users do
    resources :generators 
    resources :results
  end  
  resources :identities

Answer 1

To me, it looks like this is the culprit:

:id=>nil

We've had this problem with nested routes before (where you have /users/15/articles/215/edit)

---

This is an immediate fix:

user_generator_path(:user_id => current_user.generators, :id => variable_here)

However, it seems there is a deeper issue with your system, namely that you've created what seems to be a member route, which needs an id parameter to get it working correctly

---

Systemic Fix

You mention you "just want to display user's generators", which would make an index collection route for the user's generators?

The way to display this is to firstly change the link to open the index action of the generators controller. Currently, your controller shows you're either loading the new or create actions, and your error pertains to opening the show action. The show action in particular requires the id of the item, which is where this error is coming form

From the sounds of it, I'd just route to the index path for users_generators_path. There you can display the generators for the user without a requirement for the specific id