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I'm trying to use .get() in jQuery to send a request to server and return a python object using Django framework. By using 

data = serializers.serialize('json', ExampleModel.objects.all())
return HttpResponse(data, 'application/json')

I can get a collection of objects at javascript end like this: [object Object][object Object] But it seems impossible to call any parameters or functions from those objects. I've tried this:

for (x in data){
    alert(data[x].parameter);
}

I just get several "undefined" as a result. Can anybody explain why? Thanks.

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5  
Try console.log(data) and console.log(x) and show some results here so we can see the structure of the objects. – Simeon Visser Mar 30 '12 at 21:49
console.dir might give you something more useful. – Karl Knechtel Mar 31 '12 at 1:33

2 Answers

up vote 0 down vote

Because you was accessing undefined parameter. Take ilvar's example,

eval('data='+"{'id': 123, 'model': 'app.Model', fields:{'name': 'blah', 'active': true}}")
for (var x in data){
    console.info(x, '=>', data[x])
}
// will outputs
id => 123
model => app.Model
fields => Object

None of the 123, "app.Model" or Object has parameter property

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Thanks for the info! I can retrieve properties from my models now. One more thing: I still cannot find the functions defined in my models after passing them to javascript. What can I do with that? – Nate Ziran Chen Mar 31 '12 at 8:30
The json only contains data from server-side model instances, you need client-side javascript functions to operate on the data. – okm Mar 31 '12 at 8:47
up vote 0 down vote

Django's JSON serializer puts each object in complex structure like {'id': 123, 'model': 'app.Model', fields:{'name': 'blah', 'active': true}} so you'll need to retrieve values properly in JS. You can use Firebug for Firefox or Web Inspector for Chrome to set a breakpoint inside your callback and introspect received data.

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Thanks so much for your answer! I can retrieve values from returned objects now. Just one more thing: I did not found the functions from my Django model in these JS objects. Is it possible to pass them in JSON? – Nate Ziran Chen Mar 31 '12 at 8:29
Automatically - no. But you can construct any structure in Python and put it through simplejson.dumps() to receive any data you need. – ilvar Apr 1 '12 at 2:17
I got it. thx a lot. – Nate Ziran Chen Apr 1 '12 at 2:49
You can say "thanks" by approving and/or upvoting one or more of our answers :) – ilvar Apr 1 '12 at 22:37

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