View : Model to Json

gistfile1.py

from django.forms.models import model_to_dict
from django.utils.simplejson import dumps, JSONEncoder
from django.utils.encoding import force_unicode
#Model es tu modelo y esto es un view
def model_to_json(request):
    try:
        model_id = request.GET["model_id"]
        model = Model.objects.get(pk=model_id)
    except:
        raise Http404
    prospect_dict=model_to_dict(model)
    model_dict=prospect_dict
    for key, value in model_dict.items():
        if key.startswith('_'):
            del model_dict[key]
        else:
            model_dict[key] = force_unicode(value)
            
    json_response = dumps(model_dict, ensure_ascii=False, indent=2)
    return HttpResponse(json_response,mimetype="text/javascript")