Rails link_to onclick javascript中的ruby变量

Question

什么是错误的这句话它显示语法错误

<%= 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

你写的是什么

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

这是炸弹，因为question.id是一个Fixnum。 您将can't convert Fixnum into String TypeError 。

如何解决这个问题

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

要么

<%= 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。

要么

<%= 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。

Answer 2

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

这会奏效