在Rails 3.2中实现create时出现路由错误

Question

I am new to rails.I am getting the following error while trying to implement a create action..

Routing Error

No route matches {:action=>"show", :controller=>"settings", :format=>nil}

My controller file is as follows:-

   @settings = Setting.new(params[:settings])

respond_to do |format|
  if @settings.save
    format.html { redirect_to @settings, notice: 'Setting was successfully created.' }
    format.json { render json: @settings, status: :created, location: @settings }
  else
    format.html { render action: "new" }
    format.json { render json: @settings.errors, status: :unprocessable_entity }
  end
end

end

My Routes.rb file is as follows:-

resources :settings do
    member do
     post 'add'
     post 'remove'
     get 'settings/id'
    end

    collection do
     get  'add'
     get  'list' 
     post 'get_settings'
     get  'get_settings'
    end
  end

  resources :settings 

my rake routes has the following:-

      GET    /settings/get_settings(.:format
settings#get_settings
                      GET    /settings(.:format)
settings#index
                      POST   /settings(.:format)
settings#create
                      GET    /settings/new(.:format)
settings#new
                      GET    /settings/:id/edit(.:format)
settings#edit
                      GET    /settings/:id(.:format)
settings#show
                      PUT    /settings/:id(.:format)
settings#update
                      DELETE /settings/:id(.:format)
settings#destroy
                      GET    /settings(.:format)
settings#index
                      POST   /settings(.:format)
settings#create
                      GET    /settings/new(.:format)
settings#new
                      GET    /settings/:id/edit(.:format)
settings#edit
                      GET    /settings/:id(.:format)
settings#show
                      PUT    /settings/:id(.:format)
settings#update
                      DELETE /settings/:id(.:format)
settings#destroy

My create.html.erb is as follows:_

<%= form_for @setting  do |f| %>
  <% if @setting.errors.any? %>  
  <div id="errorExplanation">  
    <h2><%= pluralize(@setting.errors.count, "error") %> prohibited this setting from being saved:</h2>  
    <ul>  
    <% @setting.errors.full_messages.each do |msg| %>  
      <li><%= msg %></li>  
    <% end %>  
    </ul>  
  </div>  
  <% end %> 
</br></br>


Id: <%= f.text_field :id %><br>
Name: <%= f.text_field :name %><br>


<%= f.submit "Create" %>&nbsp;&nbsp;

My error log is:-

Started GET "/settings/new" for 127.0.0.1 at 2013-03-12 18:57:09 +0530
Processing by SettingsController#new as HTML
  Rendered settings/new.html.erb within layouts/application (170.2ms)
Completed 500 Internal Server Error in 1112ms

ActionController::RoutingError (No route matches {:action=>"show", :controller=>
"settings", :format=>nil}):
  app/views/settings/new.html.erb:7:in `_app_views_settings_new_html_erb__979995
802_23360592'
  app/controllers/settings_controller.rb:29:in `new'


  Rendered C:/RailsInstaller/Ruby1.9.3/lib/ruby/gems/1.9.1/gems/actionpack-3.2.1
1/lib/action_dispatch/middleware/templates/rescues/routing_error.erb within resc
ues/layout (0.0ms)

My new.html:-

<h1>New setting</h1>




<%= form_for @setting  do |f| %>
  <% if @setting.errors.any? %>  
  <div id="errorExplanation">  
    <h2><%= pluralize(@setting.errors.count, "error") %> prohibited this setting from being saved:</h2>  
    <ul>  
    <% @setting.errors.full_messages.each do |msg| %>  
      <li><%= msg %></li>  
    <% end %>  
    </ul>  
  </div>  
  <% end %> 
</br></br>


Id: <%= f.text_field :id %><br>
First Name: <%= f.text_field :name %><br>


<%= f.submit "Create" %>&nbsp;&nbsp;

<% end %>




<%= link_to 'Back', settings_path %>

Can anyone please help me.

Answer 1

A good start point is always to print out your routes via:

rake routes

Then you need to define a show method in the controller:

def show
  ..
end

And a view:

app/views/settings/show.html.erb

With the resources :settings he should recognize that there is a show path. Witch could look like this:

settings_path(user.id)

resources :settings dont needs to be included twice.

And it has nothing to do with your UserController i guess. The importend part is the SettingController . The error could appear if you display a SettingsShow link on the /view/user/show.html.erb ? (Not 100% sure, need to see more code, SettingController would be interessting).

Answer 2

Put your form in new.html.erb instead of create.html.erb like:

new.html.erb

<%= form_for @setting  do |f| %>

#Your stuff

<% end %>

Your new action then be:

new action

def new
 @setting = Setting.new
end 

Your controller then be-

create action:

UPDATE:

def create
  if request.setting?
     @setting = Setting.new(params[:setting])
    # other setup for save
    if @setting.save
      flash[:notice] = 'Setting was successfully created.'
      redirect_to @setting
    else
      render :action => 'new'
    end
  end 
end

NOTE: There is no such thing as create.html.erb when you say create is a post method. Also you should use @setting throughout your code instead of @settings as what it defined in a new method of controller.