from django.core import serializers
import json
def testjson(request):
    all_objects = list(Message.objects.all())

    to_json = serializers.serialize('json', all_objects)

    return HttpResponse(json.dumps(to_json), mimetype='application/json')

"employees": [
{ "firstName":"John" , "lastName":"Doe" },
{ "firstName":"Anna" , "lastName":"Smith" },
{ "firstName":"Peter" , "lastName":"Jones" }
]

to_json = to_json.replace('', '')

from django.core import serializers

def testjson(request):
    data = serializers.serialize('json', Message.objects.all())
    return HttpResponse(data, mimetype='application/json')