Django object is not JSON serializable

0 votes

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': <Product: hederello ()>, 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 <Product: hederello ()>. Because list composed of both django objects and dicts. Any ideas ?

Aug 7, 2020 in Python by kartik
• 37,520 points
27,674 views

1 answer to this question.

0 votes

Hello @kartik,

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!!

Thank You!!

answered Aug 7, 2020 by Niroj
• 82,840 points

Related Questions In Python

0 votes
1 answer
0 votes
0 answers

Python - TypeError: Object of type 'int64' is not JSON serializable

My data frame has store names and ...READ MORE

May 26, 2022 in Python by Kichu
• 19,040 points
2,552 views
0 votes
1 answer

print(instance(0).id) TypeError: 'list' object is not callable

Hey @Suraj, For me its working fine. ...READ MORE

answered Jan 18, 2019 in Python by Priyaj
• 58,020 points
2,993 views
0 votes
1 answer

Python TypeError: 'list' object is not callable.

The error says the list is not ...READ MORE

answered Feb 9, 2019 in Python by Omkar
• 69,220 points
29,232 views
0 votes
1 answer

How to temporarily disable a foreign key constraint in MySQL?

Hello @kartik, To turn off foreign key constraint ...READ MORE

answered Jun 23, 2020 in Python by Niroj
• 82,840 points
2,494 views
0 votes
1 answer

How do I use Django templates without the rest of Django?

Hello @kartik, Let's say you have this important ...READ MORE

answered Jun 23, 2020 in Python by Niroj
• 82,840 points
1,577 views
+1 vote
1 answer

Error:<map object at 0x7fa3435f3048> is not JSON serializable

Hello @kartik, map() in Python 3 is a generator ...READ MORE

answered Jul 3, 2020 in Python by Niroj
• 82,840 points
2,528 views
0 votes
1 answer

How to convert a DictProxy object into JSON serializable dict?

Hello, Rather than using a private DictProxy method like _getvalue(), I'd ...READ MORE

answered Apr 15, 2020 in Python by Niroj
• 82,840 points
5,221 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP