Rails link_to onclick javascript中的ruby變量

Question

什么是錯誤的這句話它顯示語法錯誤

<%= 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;"%>

正確生成以下代碼

<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

你寫的是什么

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

這是炸彈，因為question.id是一個Fixnum。 您將can't convert Fixnum into String TypeError 。

如何解決這個問題

<%= 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;"%>

這會將問題ID作為字符串發送到您的removeQuestion javascript函數。

要么

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

這會將問題ID作為整數發送到您的removeQuestion javascript函數。

Answer 2

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

這會奏效