How to implement all translations in one form with Mobility gem in Rails?

In my Rails app i'm using Mobility gem for translations

How to build a form with all translations, like:

• name [en]: _______
• name [fr]: ________
• name [de]: _______
• ...

What is the best way?

There's not really any documentation about this, but it's not difficult to create a form like that with Mobility.

Here's an example, assuming you have an object @post with a translated attribute title:

<%= form_for @post do |f| %>
  <% I18n.available_locales.each do |locale| %>
    <div>
      <% attr_name = "title_#{Mobility.normalize_locale(locale)}" %>
      <%= f.label attr_name %>
      <%= f.text_field attr_name %>
    </div>
  <% end %>

  <%= f.submit %>
<% end %>

In your controller you'll have to permit the localized attribute names as well, something like:

def update
  # ...
  @post.update(permitted_params)
  # ...
end

# ...

private

def permitted_params
  params.require(:post).permit(I18n.available_locales.map { |l|
    :"title_#{Mobility.normalize_locale(l)}"
  })
end