I have a clan.rb and clan_options.rb

clan.rb

class Clan < ActiveRecord::Base
    has_one :options, :class_name => "ClanOptions", :foreign_key => "clan_id", dependent: :destroy
end

clan_options.rb

class ClanOptions < ActiveRecord::Base
  belongs_to :clan
end

To create an edit form for clan.rb I use the following:

<%= form_for @clan, :html => {:class => 'form-horizontal'} do |clan| %>
    <fieldset>
        <!-- form stuff -->
    </fieldset>
<% end %>

It works how I want. But now I want to create an edit form for the clan_options.rb, I have no idea how to do this.

If anymore information is needed to solve this, ask me.