Django object is not JSON serializable

Question

I have the following code for serializing the queryset   def render to response self  context    response kwargs        return HttpResponse json simplejson dumps list self get queryset                              mimetype  application json     And following is my get querset       product    lt Product  hederello    gt   u  id   u 9802   u  source    u code   u 23981   u facilities     u facility    u name    u fr   u G xe9n xe9ral   u en   u General    u value    u fr    u bar   u r xe9ception ouverte 24h 24   u chambres non-fumeurs   u chambres familiales                 Which I need to serialize  But it says not able to serialize the  lt Product  hederello    gt   Because list composed of both django objects and dicts  Any ideas

User · Accepted Answer

simplejson and json don t work with django objects well   Django s built-in serializers can only serialize querysets filled with django objects   data   serializers serialize  json   self get queryset    return HttpResponse data  content type  application json     In your case  self get queryset   contains a mix of django objects and dicts inside   One option is to get rid of model instances in the self get queryset   and replace them with dicts using model to dict   from django forms models import model to dict  data   self get queryset    for item in data     item  product     model to dict item  product     return HttpResponse json simplejson dumps data   mimetype  application json     Hope that helps

User · Answer

Another great way of solving it while using a model is by using the values   function  def returnResponse date       response   ScheduledDate objects filter date  startswith date  values       return Response response

User · Answer

From version 1 9 Easier and official way of getting json  from django http import JsonResponse from django forms models import model to dict   return JsonResponse   model to dict modelinstance

User · Answer

I found that this can be done rather simple using the   values  method  which also gives named fields   result list   list my queryset values  first named field    second named field    return HttpResponse json dumps result list      list  must be used to get data as iterable  since the  value queryset  type is only a dict if picked up as an iterable   Documentation  https   docs djangoproject com en 1 7 ref models querysets  values

User · Answer

The easiest way is to use a JsonResponse   For a queryset  you should pass a list of the the values for that queryset  like so   from django http import JsonResponse  queryset   YourModel objects filter some  filter  some value   values   return JsonResponse   models to return   list queryset

User · Answer

First I added a to dict method to my model    def to dict self       return   name   self woo   title   self foo    Then I have this   class DjangoJSONEncoder JSONEncoder        def default self  obj           if isinstance obj  models Model               return obj to dict           return JSONEncoder default self  obj    dumps   curry dumps  cls DjangoJSONEncoder    and at last use this class to serialize my queryset   def render to response self  context    response kwargs       return HttpResponse dumps self get queryset       This works quite well

User · Answer

Our js-programmer asked me to return the exact JSON format data instead of a json-encoded string to her   Below is the solution  This will return an object that can be used viewed straightly in the browser   import json from xxx models import alert from django core import serializers  def test request       alert list   alert objects all        tmpJson   serializers serialize  json  alert list      tmpObj   json loads tmpJson       return HttpResponse json dumps tmpObj

[python] <Django object > is not JSON serializable

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