Fixed #10240 -- Restored YAML serialization with Decimal objects that broke...

from StringIO import StringIO

import yaml

try:

    import decimal

except ImportError:

    from django.utils import _decimal as decimal # Python 2.3 fallback

from django.db import models

from django.core.serializers.python import Serializer as PythonSerializer

from django.core.serializers.python import Deserializer as PythonDeserializer

class DjangoSafeDumper(yaml.SafeDumper):

    def represent_decimal(self, data):

        return self.represent_scalar('tag:yaml.org,2002:str', str(data))

DjangoSafeDumper.add_representer(decimal.Decimal, DjangoSafeDumper.represent_decimal)

class Serializer(PythonSerializer):

    """

    Convert a queryset to YAML.

    def end_serialization(self):

        self.options.pop('stream', None)

        self.options.pop('fields', None)

        yaml.safe_dump(self.objects, self.stream, **self.options)

        yaml.dump(self.objects, self.stream, Dumper=DjangoSafeDumper, **self.options)

    def getvalue(self):

        return self.stream.getvalue()