ruby-on-rails - 在onclick javascript中的Rails link_to ruby​​变量

Question

这句话有什么问题
它显示语法错误

<%= link_to image_tag('cancel.png'), {:action => 'remove', :id => question.id}, :title=>'Delete', :class=>'action', :onclick=>"removeQuestion("+ question.id +");return false;"%>

但

<%= link_to image_tag('cancel.png'), {:action => 'remove', :id => question.id}, :title=>'Delete', :class=>'action', :onclick=>"removeQuestion();return false;"%>

正确生成以下代码

<a title="Delete" onclick="removeQuestion();return false" class="action remove" href="/quizzes/remove/1"><img src="/images/cancel.png?1290165811" alt="Cancel"></a>

Answer 1

你写了什么

<%= link_to image_tag('cancel.png'), {:action => 'remove', :id => question.id}, :title=>'Delete', :class=>'action', :onclick=>"removeQuestion("+ question.id +");return false;"%>

之所以炸弹，是因为question.id是一个Fixnum。您将获得can't convert Fixnum into String TypeError。

解决这个问题的方法

<%= link_to image_tag('cancel.png'), {:action => 'remove', :id => question.id}, :title=>'Delete', :class=>'action', :onclick=>"removeQuestion("+ question.id.to_s +");return false;"%>

或者

<%= link_to image_tag('cancel.png'), {:action => 'remove', :id => question.id}, :title=>'Delete', :class=>'action', :onclick=>"removeQuestion('#{question.id}');return false;"%>

这会将问题ID作为字符串发送到您的removeQuestion javascript函数。

或者

<%= link_to image_tag('cancel.png'), {:action => 'remove', :id => question.id}, :title=>'Delete', :class=>'action', :onclick=>"removeQuestion(#{question.id});return false;"%>

这会将问题ID作为整数发送到您的removeQuestion javascript函数。