在Rails中正确处理JSON/Javascript解析的过程？

Question

在Rails中，我正在查询数据库为highcharts构建数据对象。

这里是我的控制我的方法：

def build_data_for_chart 
data_array = Array.new 
@data_array_as_json = '' 

@issues.each { 
    |issue| 
    # returns an array of KeyIssue objects for a given issue 
    given_issue_array = KeyIssues.where(issue: issue).all 
    a = Array.new 

    #loop through each element extracting the timedate and % and add to new array 
    given_issue_array.each { 
    |entry| 
    a.push([entry.datetime.utc.to_date, entry.percentage]) 
    } 

    #build the hash for an individual issue 
    temp_hash = {:name => issue, :data => a, :animation => false} 

    #add the individual issue and all its data to a final array that contains all the issues. 
    data_array.push(temp_hash) 
} 

@data_array_as_json = data_array.to_json.html_safe 

末

现在我想将它拔出来，在我看来，一个脚本。

---脚本---

var data = $.parseJSON(<%= @data_array_as_json %>); 

---脚本---

当我打印到控制台，我可以看到的对象和他们的所有数据。此外，当我打印到HTML输出结果看起来是正确的：

"[{\"name\":\"ABORIGINAL & NATIVE TITLE ISSUES\",\"data\":[[\"1993-11-01\",32],[\"1994-06-01\",27],[\"1994-09-01\",33],[\"1995-06-01\",26],[\"1995-09-01\",24],[\"1996-01-01\",20],[\"1996-09-01\",27],[\"1997-01-01\",33],[\"1997-06-01\",36],[\"1997-09-01\",36],[\"1998-01-01\",37],[\"1998-05-01\",33],[\"1998-09-01\",31],[\"1999-05-01\",30],[\"1999-09-01\",28],[\"2000-01-01\",30],[\"2000-05-01\",31],[\"2000-09-01\",34],[\"2001-01-01\",32],[\"2001-06-01\",29],[\"2001-09-01\",28],[\"2002-02-01\",25],[\"2002-06-01\",27],[\"2002-10-01\",25],[\"2003-02-01\",24],[\"2003-06-01\",26],[\"2003-10-01\",27],[\"2004-02-01\",27],[\"2004-06-01\",26],[\"2005-06-01\",30],[\"2006-06-01\",27],[\"2007-06-01\",31],[\"2008-07-01\",29]],\"animation\":false}]"

但是当我去打印数据变量为null（显然由于不是有效输入）。我在搞什么？

Answer 1

仅供参考..

我需要把它包在单引号..使它工作..

$.parseJSON(' <%= @data_array_as_json %> '); 

Answer 2

你可以试试这个：

<script type="text/javascript"> 
    var data = <%== data_array.to_json %> 
</script>