Ruby on Rails

<div class="modal fade" id="modal-show-refin" role="dialog" tabindex="-1">
  <div class="modal-dialog">
    <div class="modal-content">
      <div class="modal-header">
        <button aria-label="Close" class="close" data-dismiss="modal" type="button">
          <span aria-hidden="true">&times;</span>
        </button>
        <h4 class="modal-title">Details of refin</h4>
      </div>
      <div class="modal-body"></div>
    </div>
  </div>
</div>

  resources :refinancings do
      get 'details_refin'
  end

def details_refin
    @refin = Refinancing.find(params[:refinancing_id])
  end

$(".modal-body").empty();
$('.modal-body').html('#{escape_javascript(render 'details_refin')}');
$("#modal-show-refin").modal('show');