ruby-on-rails – Rails:在View中检查has_many
发布时间:2020-12-17 01:43:56 所属栏目:百科 来源:网络整理
导读:如果我有… class Bunny ActiveRecord::Base has_many :carrotsend …如果@bunny有胡萝卜,我如何查看View?我想做这样的事情: % if @bunny.carrots? % strongYay! Carrots!/strong % for carrot in @bunny.carrots % You got a %=h carrot.color % carrot!b
如果我有…
class Bunny < ActiveRecord::Base has_many :carrots end …如果@bunny有胡萝卜,我如何查看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 – 会怎么样? 解决方法<% if @bunny.carrots.any? %> <strong>Yay! Carrots!</strong> <% for carrot in @bunny.carrots %> You got a <%=h carrot.color %> carrot!<br /> <% end %> <% end %> (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |