환불요청 상태 표시

show.html.erb

<div class="iux-has-hover iu-cell cell-136">
  <% if @event.refund_requested_by?(current_user) %>
    <%= link_to '환불 신청하기', refund_event_path(@event)  %>
  <% else %>
    <%= link_to '환불 신청이 완료됨', '#'  %>
  <% end %>
</div>

class Event < ActiveRecord::Base
...
  def refund_requested_by?(user)
    !!user.event_refunds.where(event_id: id).first
  end
...
end