ruby-on-rails - rails : Check has_many in View

Question

如果我有...

class Bunny < ActiveRecord::Base
  has_many :carrots
end

...如果 @bunny 有胡萝卜，我如何检查 View ？我想做这样的事情:

<% if @bunny.carrots? %>
  <strong>Yay! Carrots!</strong>
  <% for carrot in @bunny.carrots %>
    You got a <%=h carrot.color %> carrot!<br />
  <% end %>
<% end %>

我知道 @bunny.carrots? 不起作用——什么会起作用？

Answer 1

<% if @bunny.carrots.any? %>
  <strong>Yay! Carrots!</strong>
  <% for carrot in @bunny.carrots %>
    You got a <%=h carrot.color %> carrot!<br />
  <% end %>
<% end %>