jQuery: How to read custom object returned by Django view?

Question

here is my django view

@csrf_exempt
@login_required
def get_playlists_for_user(request):
    """
    gets all playlists for user
    """
    logging.info('getting playlist for user - ' + str(request.user))
    playlists = UserPlaylist.objects.get_all_playlists_for_user(request.user)
    logging.info('user=%s, playlists=%s'%(request.user, playlists))
    return HttpResponse(playlists)

Here is how jQuery calls it via ajax

$.ajax({
        url: '/getUserPlaylists',
        success: function(response, textStatus, jqXHR){

            console.log(response);
        },
        error: function(response, textStatus, jqXHR) {

        }
});

the view return the list of Playlist objects

playlists=[<Playlist id:1, name:first, date_created:2012-08-05 06:28:31.954623+00:00, deleted:False>, <Playlist id:2, name:my, date_created:2012-08-06 12:47:13.023537+00:00, deleted:False>, <Playlist id:3, name:new, date_created:2012-08-06 12:48:45.708277+00:00, deleted:False>, <Playlist id:5, name:second, date_created:2012-08-06 21:19:33.050187+00:00, deleted:False>]

The schema model for Playlist is

class Playlist(models.Model):
    name = models.CharField(max_length=30)
    date_created = models.DateTimeField(auto_now_add=True)
    date_modified = models.DateTimeField(auto_now=True)
    deleted = models.BooleanField(default=False)

When I log them in firebug I see them as

Playlist objectPlaylist objectPlaylist objectPlaylist object

How can I read these objects in jQuery?

Timmy O'Mahony · Accepted Answer · 2012-08-08 13:49:39Z

2

You need to return the Python objects in a form javascript can understand which is usually json (javascript object notation). So in your view, convert your django queryset into json, using django's serialisers:

from django.core import serializers
...
json = serializers.serialize('json', playlists)
return HttpResponse(json, mimetype="application/json")

and in your ajax:

$.ajax({
       url: '/getUserPlaylists',
       dataType: "json",
       success: function(response, textStatus, jqXHR){
           for(var i = 0; i < response.length; i++ ){
               var playlist = response[i]['fields'];
               // Do something now with your playlist object
               console.log(playlist.name);
           }
       },
       error: function(response, textStatus, jqXHR) {
       }
});

this will mean the response in your ajax success will be something like this (a list of javascript objects) :

[{ "model" : "playlist.Playlist", "pk" : 1, "fields" : { "name" : "...", ... } }]

edited Aug 8, 2012 at 13:49

answered Aug 8, 2012 at 13:43

Timmy O'Mahony

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2 Comments

Daniel Roseman Over a year ago

Right idea, but json.dumps(playlists) won't do anything useful, as json does not know how to serialize a queryset.

Timmy O'Mahony Over a year ago

Yea, just noticed it was a QS, not an object. Just going to update

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