django serializers to json - custom json output format

Question

I am quite new to django and recently I have a requirement of a JSON output, for which I use the following django code:

data = serializers.serialize(\"json\", My         


        

Answer 1

You'll need to write a custom Json serializer. Something like this should do the trick:

class FlatJsonSerializer(Serializer):
    def get_dump_object(self, obj):
        data = self._current
        if not self.selected_fields or 'id' in self.selected_fields:
            data['id'] = obj.id
        return data

    def end_object(self, obj):
        if not self.first:
            self.stream.write(', ')
        json.dump(self.get_dump_object(obj), self.stream,
                  cls=DjangoJSONEncoder)
        self._current = None

    def start_serialization(self):
        self.stream.write("[")

    def end_serialization(self):
        self.stream.write("]")

    def getvalue(self):
        return super(Serializer, self).getvalue()

The you can use it like this:

s = FlatJsonSerializer()
s.serialize(MyModel.objects.all())

Or you could register the serializer with django.core.serializers.register_serializer and then use the familiar serializers.serialize shortcut.

Take a look at the django implementation as a reference if you need further customization: https://github.com/django/django/blob/master/django/core/serializers/json.py#L21-62