why form_for does not work for me

Question

(ruby 1.9.2 rails 3.0.6)

I am new to ROR, sorry for my simple question.

I have a form and a controller, when i launch my app, i can see the log have been displayed.. however there are exception when rendering the view...

Everything should look just fine.. what is the problem? how can I fix it?

Thanks.

undefined method `users_path' for #<#<Class:0x47c7678>:0x47c6118>
Extracted source (around line #2):

1: <h1>Welcome Aboard</h1>
2: <%= form_for(@user) do |f| %>
3:   <table>
4:     <tr>
5:       <td><%= f.label :username %></td>

class RegisterController < ApplicationController

  def sign_up
    logger.debug("sign_up inoked")

    @user = User.new

    logger.debug("sign_up finished")
  end

end

views/register/sign_up.html.erb

<%= form_for(@user) do |f| %>
  <table>
    <tr>
      <td><%= f.label :username %></td>
      <td><%= f.text_field :username %></td>
    </tr>
    <tr>
      <td><%= f.label :password %></td>
      <td><%= f.password_field :password %></td>
    </tr>
    <tr>
      <td><%= f.label :password_confirmation %></td>
      <td><%= f.password_field :password_confirmation %></td>
    </tr>
    <tr>
      <td colspan="2"></td>
    </tr>
    <tr>
      <td colspan="2"><%= f.submit "Sign up" %></td>
    </tr>
  </table>
<% end %>

Answer 1

It seems that you do not have the appropriate routes. Do you have a line like :

resources :users

in your routes.rb file ? If not try adding that please. Or just create the particular users_path named route.