Question

I’m trying to use paperclip with rails 3.1 but I keep getting this routing error.

No route matches {:action=>”show”, :controller=>”users”}

I followed the instructions at thoughtbot/paperclip on github.

<%= form_for :user, @user, :url => user_path, :html => { :multipart => true } do |f| %>
  <% if @user.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2>

      <ul>
      <% @user.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :FirstName %><br />
    <%= f.text_field :FirstName %>
  </div>
  <div>
    <%= f.label :avatar%>
    <%= f.file_field :avatar %> 
  </div>
  <div class="field">
    <%= f.label :LastName %><br />
    <%= f.text_field :LastName %>
  </div>
  <div class="field">
    <%= f.label :Email %><br />
    <%= f.text_field :Email %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

User.rb

class User < ActiveRecord::Base
  has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100>" }
end

routes.rb

City::Application.routes.draw do
  resources :users
end

show.html.erb

<p id="notice">
    <%= notice %>
</p>
<p>
    <b>Firstname:</b>
    <%= @user.FirstName %>
</p>
<p>
    <b>Lastname:</b>
    <%= @user.LastName %>
</p>
<p>
    <b>Email:</b>
    <%= @user.Email %>
</p>
<p>
    <b>Avatar</b>
    <%= image_tag @user.avatar.url %>
    <%= image_tag @user.avatar.url(:medium) %>
    <%= image_tag @user.avatar.url(:thumb) %>
</p>
<%= link_to 'Edit', edit_user_path(@user) %> |
<%= link_to 'Back', users_path %> 

!UPDATE!

$ rake routes
events GET /events(.:format) {:action=>”index”, :controller=>”events”}
POST /events(.:format) {:action=>”create”, :controller=>”events”} new_event GET
/events/new(.:format) {:action=>”new”,
:controller=>”events”} edit_event GET /events/:id/edit(.:format)
{:action=>”edit”, :controller=>”events”}
event GET /events/:id(.:format) {:action=>”show”, :controller=>”events”}
PUT /events/:id(.:format) {:action=>”update”, :controller=>”events”}
DELETE /events/:id(.:format) {:action=>”destroy”, :controller=>”events”}
root / {:controller=>”events”, :action=>”index”}
/:controller(/:action(/:id(.:format)))

Answer 1

I believe you should use users_path (plural) and, the user routes are not in your rake output, can you check your routes file?