根据用户的选择添加其他表单

Question

我已经堆积了。 这是代码

<div class="form-group">

           <%= f.radio_button :repeat, 'once', checked: true%><br>
           <%= f.label :repeat_once, 'once'%><br>
           <%= f.radio_button :repeat, 'daily'%><br>
           <%=f.label :repeat_daily, 'daily'%><br>
           <%= f.radio_button :repeat, 'weekly'%><br>
           <%= f.label :repeat_weekly, 'weekly'%><br>
           <%= f.radio_button :repeat, 'monthly'%><br>
           <%= f.label :repeat_monthly, 'monthly'%><br>
           <%= f.radio_button :repeat, 'yearly'%><br>
           <%=f.label :repeat_yearly, 'yearly' %><br>
         </div>
  `<% if @event.repeat == 'daily' %>
           <div class="field">
        <%= f.label :Repeating_interval_in_days %><br>
        <%= f.number_field :interval %>
      </div>
       <% end %>
        <% if @event.repeat == 'weekly' %>
           <div class="field">
        <%= f.label :Repeating_interval_in_weeks %><br>
        <%= f.number_field :interval %>
      </div>
       <% end %>
       <% if @event.repeat == 'monthly' %>
           <div class="field">
        <%= f.label :Repeating_interval_in_month %><br>
        <%= f.number_field :interval %>
      </div>
       <% end %>
       <% if @event.repeat == 'yearly' %>
           <div class="field">
        <%= f.label :Repeating_interval_in_years %><br>
        <%= f.number_field :interval %>
      </div>
       <% end %>

当用户设置重复类型时，我想要选择重复间隔的额外字段。我的代码不起作用。