What's the different between :method => :put and => :post + routing

Question

Why did he use :put and how should I route it ?

The form:

<p>Sign Up</p>
<%= form_for @user, :as => :user, :url => new_user_path, :method => :put do |f| %>
  ...
<% end %>

There is a :put at the end and as you can see he didn't show how to route the :put-method.

My route.rb looks like this:

Calendar::Application.routes.draw do
  root "welcome#index"

  get "user/change_pw"
  get "user/forgot_pw"
  get "user/new" => "user#new"
  get "user/sent_pw"
  get "user/sign_in" => "user#sign_in"
  get "user/signed_out" => "user#signed_out"
  get "welcome/index"

  post "user/sign_in" => "user#login"
  post "user/new" => "user#register"
end

If I click "Sign up" the following error appears:

No route matches [PUT] "/user/new"

Any ideas ?

Answer 1

By "convention" the form code is incorrect. For a new resource, you should be using post method and not put method. Please see Representational state transfer for details on the different http methods.

As shown, you also already have post "user/new" => "user#register" route defined, so fix the view code by either removing the :method => :put as form_for defaults to post, or by replacing the method to :post.

<%= form_for @user, :as => :user, :url => new_user_path do |f| %>

Answer 2

Looks like a mistake. Just change the form's method to :post. PUT is usually used for updating data, not creating it.