'str' object has no attribute '_meta'

Question

def participant_specific(request, participant):
    helper = RelayFunctions()
    info = helper.participant_specific_donation(participant)
    info1 = helper.participant_specific_milestone(participant)

    data = { 'participant_specific_donation' : info , 'participant_specific_milestone' : info1 }
    json_serializer = serializers.get_serializer("json")()
    response = json_serializer.serialize(data, ensure_ascii=False)
    return HttpResponse(response, mimetype="application/json") 

Traceback:
 File "/home/vtrelayc/lib/python2.6/site-packages/django/core/handlers/base.py" in get_response
   111.                         response = callback(request, *callback_args, **callback_kwargs)
 File "/home/vtrelayc/projects/relay/relayapp/views.py" in participant_specific
   192.     response = json_serializer.serialize(data, ensure_ascii=False)
 File "/home/vtrelayc/lib/python2.6/site-packages/django/core/serializers/base.py" in serialize
   46.             concrete_model = obj._meta.concrete_model

 Exception Type: AttributeError at /participants/specific/1/
 Exception Value: 'str' object has no attribute '_meta'

Error: 'str' object has no attribute '_meta'

We're trying to parse the dictionary but it says it's a string? Is it because of the multiple objects in one dictionary?

Answer 1

Django's serializers are only for serializing QuerySets, but you're passing it a dict. If you want to serialize a dict, perhaps you're looking for Python's built-in json module.

Answer 2

json_serializer.serialize is supposed to be used with a queryset. More info here.

You should be able to achieve the same with this:

import json
data = json.dumps({ 'participant_specific_donation' : info , 'participant_specific_milestone' : info1 })

Hope this helps.