Ruby on Rails Tutorial (Book) Chapter 7 (3rd Edition) - No route matches [POST] "/signup" - railstutorial.org

Question

I'm getting an 'No route matches [POST] "/signup"' error when in Chapter 7, I try to submit the signup form.
These are my routes:
root_path GET / static_pages#home
help_path GET /help(.:format) static_pages#help
about_path GET /about(.:format) static_pages#about
contact_path GET /contact(.:format) static_pages#contact
signup_path GET /signup(.:format) users#new
login_path GET /login(.:format) sessions#new
logout_path GET /logout(.:format) sessions#destroy
users_path GET /users(.:format) users#index
POST /users(.:format) users#create
new_user_path GET /users/new(.:format) users#new
edit_user_path GET /users/:id/edit(.:format) users#edit
user_path GET /users/:id(.:format) users#show
PATCH /users/:id(.:format) users#update
PUT /users/:id(.:format) users#update
DELETE /users/:id(.:format) users#destroy
sessions_path POST /sessions(.:format) sessions#create
new_session_path GET /sessions/new(.:format) sessions#new
session_path DELETE /sessions/:id(.:format) sessions#destroy
This is my Users controller:
class UsersController < ApplicationController
def show
#user = User.find(params[:id])
end
def new
#user = User.new
end
def create
#user = User.new(user_params)
if #user.save
flash[:success] = "Welcome to the Sample App!"
redirect_to users_path(#user)
else
render 'new'
end
end
private
def user_params
params.require(:user).permit(:name, :email, :password,
:password_confirmation)
end
end
And this is the view where the signup gets posted from:
<% provide(:title, 'Sign up') %>
<h1>Sign up</h1>
<div class="row">
<div class="col-md-6 col-md-offset-3">
<%= form_for #user do |f| %>
<%= render 'shared/error_messages' %>
<%= f.label :name %>
<%= f.text_field :name, class: 'form-control' %>
<%= f.label :email %>
<%= f.text_field :email, class: 'form-control' %>
<%= f.label :password %>
<%= f.password_field :password, class: 'form-control' %>
<%= f.label :password_confirmation, "Confirmation" %>
<%= f.password_field :password_confirmation, class: 'form-control' %>
<%= f.submit "Create my account", class: "btn btn-primary" %>
<% end %>
</div>
</div>
Here is my routes file:
Rails.application.routes.draw do
root 'static_pages#home'
get 'help' => 'static_pages#help'
get 'about' => 'static_pages#about'
get 'contact' => 'static_pages#contact'
get 'signup' => 'users#new'
get 'login' => 'sessions#new'
get 'logout' => 'sessions#destroy'
resources :users
resources :sessions, only: [:new, :create, :destroy]
end

Answer 1

Place your resources at the top of the routes.rb file, here is my routes.rb:
Rails.application.routes.draw do
resources :users
resources :sessions, only: [:new, :create, :destroy]
root 'static_pages#home'
match '/signup' , to: 'users#new' , via: 'get'
match '/login' , to: 'sessions#new' , via: 'get'
match '/logout' , to: 'sessions#destroy' , via: 'delete'
match '/help' , to: 'static_pages#help' , via: 'get'
match '/about' , to: 'static_pages#about' , via: 'get'
match '/contact' , to: 'static_pages#contact', via: 'get'
end
Instead of:
Rails.application.routes.draw do
root 'static_pages#home'
get 'help' => 'static_pages#help'
get 'about' => 'static_pages#about'
get 'contact' => 'static_pages#contact'
get 'signup' => 'users#new'
get 'login' => 'sessions#new'
get 'logout' => 'sessions#destroy'
resources :users
resources :sessions, only: [:new, :create, :destroy]
end

Answer 2

Chapter 7 doesn't have any references to sessions.
That happens in Chapter 8.
This is how the routes look like at the end of Chapter 7.
Rails.application.routes.draw do
root 'static_pages#home'
get 'about' => 'static_pages#about'
get 'help' => 'static_pages#help'
get 'contact' => 'static_pages#contact'
get 'signup' => 'users#new'
resources :users
end