title: Ruby on Rails submit not working
body: <p>My problem is that the submit button on my form doesn't cause any effect.
  user.rb:</p>
  
  <pre><code>class User &lt; ActiveRecord::Base
    # Include default devise modules. Others available are:
    # :confirmable, :lockable, :timeoutable and :omniauthable
    devise :database_authenticatable, :registerable,
           :recoverable, :rememberable, :trackable, :validatable
  end
  </code></pre>
  
  <p>routes.rb:</p>
  
  <pre><code>devise_for :users, controllers: {
    sessions: "users/sessions",
    registrations: "users/registrations"
  }
  </code></pre>
  
  <p>views/devise/registrations/new.html.erb:</p>
  
  <pre><code>&lt;% provide(:page, 'home') %&gt;
  &lt;div class="container"&gt;
      &lt;div class="row"&gt;
          &lt;div class="col-lg-8 col-lg-offset-2 col-md-10 col-md-offset-1"&gt;
              &lt;%= simple_form_for(@user, url: registration_path(@user)) do |f| %&gt;
                &lt;!-- &lt;%= f.error_notification %&gt; --&gt;
  
                &lt;div class="form-inputs"&gt;
                  &lt;%= f.input :email, required: true, autofocus: true %&gt;
                  &lt;%= f.input :password, required: true, hint: ("#{@minimum_password_length} characters minimum" if @minimum_password_length) %&gt;
                  &lt;%= f.input :password_confirmation, required: true %&gt;
                &lt;/div&gt;
  
                &lt;div class="form-actions"&gt;
                  &lt;%= f.button :submit, "Sign up" %&gt;
                &lt;/div&gt;
              &lt;% end %&gt;
  
              &lt;%= render "devise/shared/links" %&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>and the controller that generated by the devise gem: <code>raisl g devise:controller users</code></p>