FollowedTopic属于主题,我希望能够输出父母" topic.title"代替最后一个":id"符号
<%= f.collection_select(:followedtopic_id, FollowedTopic.all, :id, :id) %>
我已经挣扎了好几个小时才搞清楚这一点,有可能这样做吗?
答案 0 :(得分:0)
<%= f.select :followedtopic_id, FollowedTopic.includes(:topic).all.map{|ft| [ft.topic.title, ft.id] } %>