Rails HTML请求：发布但是执行：获取

Question

我有一些参加/退出比赛的代码：

<% if @competition.users.exclude?(@user)  %>
  <%= link_to 'Attend Competition', attend_competition_path(@competition.id), :method => :post %>
<% else %>
  <%= link_to 'Withdraw', withdraw_competition_path(@competition.id), :method => :post %>
<% end %>

当我点击操作时，我会转到错误页面：

No route matches [GET] "/competitions/1/withdraw"

为什么不执行POST请求？我该如何解决这个问题？

不确定它是否会影响它，但我当前的js是

//= require jquery
//= require bootstrap
//= require turbolinks
//= require_tree .

感谢