Undefined method 'errors' for nil:NilClass

Question

I'm following this tutorial on authentication in rails and I'm encountering an issue on the html signup form :

undefined method errors for nil:NilClass

to this line : <% if @user.errors.any? %> <% if @user.errors.any? %> .

I searched a lot on internet and tried a lot of things, but I cannot make it work.

Here is my view :

<%= form_for(:user, :url => {:controller => 'users', :action => 'create'}) do |f| %>
  <input class="col-lg-4 col-lg-offset-4" type="text" placeholder="Email" size="6"></br>
  <input class="col-lg-4 col-lg-offset-4" type="password" placeholder="Password" size="6"></br>
  <input class="col-lg-4 col-lg-offset-4" type="password" placeholder="Password confirmation" size="6"></br>
  <%= f.submit %><div id="valid"><input class="col-lg-4 col-lg-offset-4" type="submit" value="Sign up"/></div>
  <button type="button" class="btn btn-link col-lg-4 col-lg-offset-4"><%=link_to "Already registered ?", home_path%></button>
<% end %>
<% if @user.errors.any? %> // The error line 
  <ul class="Signup_Errors">
  <% for message_error in @user.errors.full_messages %>
    <li>* <%= message_error %></li>
  <% end %>
  </ul>
<% end %>

My controller :

class UsersController < ApplicationController
  def new
    @user = User.new
  end

  def create
    @user = User.new(params[:user])
    if @user.save
      flash[:notice] = "You signed up successfully"
      flash[:color]= "valid"
    else
      flash[:notice] = "Form is invalid"
      flash[:color]= "invalid"
    end
    render "new"
  end
end

and my route :

Rails.application.routes.draw do

  root :to => 'users#home'
  get 'home' => 'users#home'
  get 'signup' => 'users#signup'

  resources :users do
    post :create
  end

Answer 1

You need to rename the new action to signup . In current state - rails sees the template for signup and assumes that corresponding controller action is just empty, thus the nil in instance variable, because new is not being called.