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POJson list to javascript object to build a form
 

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  1. POJson list to javascript object to build a form
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    <p>i'm not sure about how JSON's lists work when parsed as javascript objects. But however i'm niether used to javascript, so my question and the proposed solution could contain stupid mistakes. I have a JSON file, and i have to build a form from it, so i'm parsing it with jQuery .parseJSON to obtain a javascript object. The json file is the following:</p> <pre><code>{"Form": [{"Name":"Conan", "Description":"Adventure", "Value":"Children Movie"}, {"Name":"Sandocan", "Description":"Adventure", "Value":"Children Movie"}, {"Name":"Terminator", "Description":"Sci-Fi", "Value":"Action Movie"}, {"Name":"Iron Man", "Description":"Adventure", "Value":"Children Movie"}]} </code></pre> <p>It should be right from the syntax point of view.</p> <p>The code tha processes it is in a web page, the JSON code is printed in the page by a template tag: {{line}}. I tried assigning it to a variable but i'm still not sure if the code really processes it. However the code of the page is below:</p> <pre><code>&lt;html&gt;&lt;script src="../jquery.js"&gt; &lt;/script&gt; &lt;body&gt;&lt;p&gt; Data previously inserted: {{line}}&lt;/p&gt; &lt;form action="/myform/" method="post"&gt;Choose the movie you prefer:&lt;br /&gt; &lt;script language=javascript&gt; var lin={{line}} var obj=jQuery.parseJSON(lin); function str_to_obj(o){ document.write("Hello world"); for(item in o.Form) { document.write(item.Name); }; } str_to_obj(obj); &lt;/script&gt; &lt;input type="radio" name="title"&gt;&lt;br /&gt; &lt;input type="text" name="description"&gt;&lt;br /&gt; &lt;input type="submit" value="Submit"&gt; &lt;/form&gt;&lt;/body&gt;&lt;/html&gt; </code></pre> <p>Firebug reports: </p> <pre><code>SyntaxError: invalid property id var obj=jQuery.parseJSON({&amp;quot;Form&amp;quot;: [{&amp;quot;Name&amp;quot;:&amp;quot;Conan&amp;quot; </code></pre> <p>I'm doing something silly, i'm sure, but i have to make it work.</p>
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    1. COWhat template library are you using? Something like `Django`? You can't directly put var lin = {{ line }} in a JavaScript file/script, it won't be interpreted properly as you can see with the `"&quot;"`.
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    2. COOnce you get past that problem, the next will be that inside your `for` loop the `item` variable will actually be the index, not the item itself so you need `o.Form[item].Name`. (But you shouldn't use a `for..in` loop on an array, you should use a conventional `for(var i=0;i<o.Form.length;i++){document.write(o.Form[i].Name);}`.)
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    3. CODon't show us a server side template and report a JavaScript error. Determine if the problem is that the server side code isn't outputting the code you expect or if the output code is not doing what you think it should - then focus on the relevant half.
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