serialize javascript object into a JSON string

Question

i have this javascript prototype:

Utils.MyClass1 = function(id, member) {
this.id = id;
this.member = member;
}

and i create a new Object:

var myobject = new MyClass1("5678999", "text");

if i do:

console.log(JSON.stringify(myobject));

The result is:

{"id":"5678999", "member":"text"}

but i need that the typeof the objects includes in json string, like this:

"MyClass1": { "id":"5678999", "member":"text"}

There are a fast way using any framework or something? or i need to implement the toJson() method in the class and do it manually.

Thanks!

sorry, the last json string has an error, this is the good: "MyClass1": { "id":"5678999", "member":"text"}

Jakub Konecki · Answer 1 · 2011-11-17 11:14:16Z

up vote 4 down vote

var myobject = new MyClass1("5678999", "text");
var dto = { MyClass1: myobject };
console.log(JSON.stringify(dto));

EDIT:

JSON.stringify will stringify all 'properties' of your class. If you want to persist only some of them, you can specify them individually like this:

var dto = { MyClass1: {
    property1: myobject.property1,
    property2: myobject.property2
}};

edited Nov 17 '11 at 11:14

answered Nov 17 '11 at 9:30

Jakub Konecki
21.7k31758

1

its a good idea, but not only have a class MyClass, inside MyClass i have a lot attributes that are objects, and i dont know it. – Kalamarico Nov 17 '11 at 9:38

You could use myobject.constructor. See my answer or developer.mozilla.org/en/JavaScript/Reference/Global_Objects/… for more info! – Willem Mulder Nov 17 '11 at 10:28

thx Willem, i will test, thanks a lot – Kalamarico Nov 17 '11 at 11:18

Willem Mulder · Answer 2 · 2011-11-17 10:23:48Z

Well, the type of an element is not standardly serialized, so you should add it manually. For example

var myobject = new MyClass1("5678999", "text");
var toJSONobject = { objectType: myobject.constructor, objectProperties: myobject };
console.log(JSON.stringify(toJSONobject));

Good luck!

edit: changed typeof to the correct .constructor. See https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Object/constructor for more information on the constructor property for Objects.

thx again, i think that your solution is good for me, im going to test

Geuis · Answer 3 · 2011-11-17 09:54:28Z

You can use a named function on the constructor.

MyClass1 = function foo(id, member) {
    this.id = id;
    this.member = member;
}

var myobject = new MyClass1("5678999", "text");

console.log( myobject.constructor );

//function foo(id, member) {
//    this.id = id;
//    this.member = member;
//}

You could use a regex to parse out 'foo' from myobject.constructor and use that to get the name.

Elias Hossain · Answer 4 · 2011-11-18 11:45:47Z

Below is another way by which we can JSON data with JSON.stringify() function

var Utils = {};
Utils.MyClass1 = function (id, member) {
    this.id = id;
    this.member = member;
}
var myobject = { MyClass1: new Utils.MyClass1("5678999", "text") };
alert(JSON.stringify(myobject));

Kalamarico · Accepted Answer · 2011-11-18 13:10:43Z

ok i resolve my problem in this way:

i adjust the json2.js standard method JSON.stringify() and in str() function when reads an object i put first the typeof, very simple:

....
    // Otherwise, iterate through all of the keys in the object.
            var speechModify = false;
            if(value.classname) {
                partial.push('"' + value.classname + '":{');
                speechModify = true;
            }
.....

Only to add is a classname attribute in my classes. And after the iterate adds this sentence:

if(speechModify)
            partial.push("}");

// Join all of the member texts together, separated with commas,
// and wrap them in braces.

            v = partial.length === 0
                ? '{}'
                : gap
                ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
                : '{' + partial.join(',') + '}';
            gap = mind;

        v = v.replace("{,","{");
        v = v.replace(",}", "}");

Thanks all.

dips · Answer 6 · 2013-02-27 04:55:03Z

up vote 0 down vote

This might be useful. http://nanodeath.github.com/HydrateJS/ https://github.com/nanodeath/HydrateJS

Use hydrate.stringify to serialize the object and hydrate.parse to deserialize.

answered Feb 27 at 4:55

dips
37429

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serialize javascript object into a JSON string

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