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I'm using Node.js and express (3.x). I have to provide an API for a mac client and from a post request I extract the correct fields. (The use of request.param is mandatory) But the fields should be posed back together to JSON, instead of strings.

I got:

var obj = {
        "title": request.param('title'),
        "thumb": request.param('thumb'),
        "items": request.param('items')
    };

and request.param('items') contains an array of object but still as a string:

'[{"name":"this"},{"name":"that"}]'

I want to append it so it bees:

var obj = {
            "title": request.param('title'),
            "thumb": request.param('thumb'),
            "items": [{"name":"this"},{"name":"that"}]
        };

Instead of

var obj = {
                "title": request.param('title'),
                "thumb": request.param('thumb'),
                "items": "[{\"name\":\"this\"},{\"name\":\"that\"}]"
            };

Anyone who can help me with this? JSON.parse doesn't parse an array of object, only valid JSON.

I'm using Node.js and express (3.x). I have to provide an API for a mac client and from a post request I extract the correct fields. (The use of request.param is mandatory) But the fields should be posed back together to JSON, instead of strings.

I got:

var obj = {
        "title": request.param('title'),
        "thumb": request.param('thumb'),
        "items": request.param('items')
    };

and request.param('items') contains an array of object but still as a string:

'[{"name":"this"},{"name":"that"}]'

I want to append it so it bees:

var obj = {
            "title": request.param('title'),
            "thumb": request.param('thumb'),
            "items": [{"name":"this"},{"name":"that"}]
        };

Instead of

var obj = {
                "title": request.param('title'),
                "thumb": request.param('thumb'),
                "items": "[{\"name\":\"this\"},{\"name\":\"that\"}]"
            };

Anyone who can help me with this? JSON.parse doesn't parse an array of object, only valid JSON.

• javascript
• json
• node.js
• express

Share Improve this question Follow asked Jul 16, 2013 at 10:07 emiel187emiel187 19122 gold badges33 silver badges99 bronze badges

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3 Answers 3

Sorted by: Reset to default 7

How about this:

var obj = JSON.parse("{\"items\":" + request.param('items') + "}");
obj.title = request.param('title');
obj.thumb = request.param('thumb');

JSON.stringify(obj);

Perhaps I'm missing something, but this works just fine:

> a = '[{"name":"this"},{"name":"that"}]';
'[{"name":"this"},{"name":"that"}]'
> JSON.parse(a)
[ { name: 'this' }, { name: 'that' } ]

[email protected]

May be you have old library Prototype. As I remove it, bug has disappeared.

You can try the same code. Once in page with Prototype.js. Second time in new page without library.

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