railscast 197:尝试使用javascript添加字段时出错

时间:2011-01-10 22:59:47

标签: javascript jquery ruby-on-rails

HI,

我尝试按照197:嵌套模型表单第2部分railscast 197但是当我尝试通过javascript添加字段时出现此错误:

 
Uncaught SyntaxError: Unexpected token &

这里是帮手:

  def link_to_add_fields(name, f, association)  
    new_object = f.object.class.reflect_on_association(association).klass.new  
    fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder|  
      render(association.to_s.singularize + "_fields", :f => builder)  
    end  
    link_to_function(name, h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")"))  
  end

和javascript函数:

function add_fields(link, association, content) {  
  var new_id = new Date().getTime();  
  var regexp = new RegExp("new_" + association, "g");  
  $(link).parent().before(content.replace(regexp, new_id));  
}

我认为的电话:

- form_for @report do |f|
  %h1= f.label :name 
  %p= f.text_field :name
  - f.fields_for :requests do |builder|
    = render 'request_fields', :f => builder

  %p= link_to_add_fields "Add Request", f, :requests

这是我得到的HTML:

onclick="add_fields(this, "requests", "<div class=\'fields\'>\n  <h1><label for=\"report_requests_attributes_new_requests_query\">Query<\/label><\/h1>\n  <input id=\"report_requests_attributes_new_requests_query\" name=\"report[requests_attributes][new_requests][query]\" size=\"30\" type=\"text\" />\n  <input id=\"report_requests_attributes_new_requests__destroy\" name=\"report[requests_attributes][new_requests][_destroy]\" type=\"hidden\" value=\"false\" /><a href=\"#\" onclick=\"remove_fields(this); return false;\">remove<\/a>\n  <br>\n<\/div>\n"); return false;"

我试图用CGI.unescapeHTML来解决它,我得到了:

"add_fields(this, \"requests\", \"<div class='fields'>\n  <h1><label for=\"requests_query\">Query</label></h1>\n  <input id=\"requests_query\" name=\"requests[query]\" size=\"30\" type=\"text\" />\n  <input id=\"requests__destroy\" name=\"requests[_destroy]\" type=\"hidden\" value=\"false\" /><a href=\"#\" onclick=\"remove_fields(this); return false;\">remove</a>\n  <br>\n</div>\n\"); return false;"

对我来说一切似乎都是正确的,我不知道问题出在哪里。如果有人有想法。

谢谢,

阿兰

2 个答案:

答案 0 :(得分:2)

使用raw在Rails 3 +中正确地转义JS:

<%= raw(@stuff) %>

确保您逃脱的是安全的。

答案 1 :(得分:2)

您需要删除转义HTML的h函数。在application_helper.rb

link_to_function(name, h("add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")"))

应该是

link_to_function(name, "add_fields(this, \"#{association}\", \"#{escape_javascript(fields)}\")")