Agile Web Development with Rails 5.1

Iteration K4: Adding a Locale Switcher

We’ve completed the task, but we need to advertise its availability more. We spy some unused area in the top-right side of the layout, so we add a form immediately before the image_tag:

rails51/depot_u/app/views/layouts/application.html.erb

    <header class="main">
      <aside>
        <%= form_tag store_index_path, class: 'locale' do %>
          <%= select_tag 'set_locale',
            options_for_select(LANGUAGES, I18n.locale.to_s),
            onchange: 'this.form.submit()' %>
          <%= submit_tag 'submit', id: "submit_locale_change" %>
        <% end %>
      </aside>
      <%= image_tag 'logo.svg', alt: 'The Pragmatic Bookshelf' %>
      <h1><%= @page_title %></h1>
    </header>

The form_tag specifies the path to ...