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"""
YAML serializer.
Requires PyYaml (http://pyyaml.org/), but that's checked for in __init__.
"""
import datetime
from django.core.serializers.python import Serializer as PythonSerializer
from django.core.serializers.python import Deserializer as PythonDeserializer
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
import yaml
class Serializer(PythonSerializer):
"""
Convert a queryset to YAML.
"""
def end_serialization(self):
self.options.pop('stream', None)
self.options.pop('fields', None)
yaml.dump(self.objects, self.stream, **self.options)
def getvalue(self):
return self.stream.getvalue()
def Deserializer(stream_or_string, **options):
"""
Deserialize a stream or string of YAML data.
"""
if isinstance(stream_or_string, basestring):
stream = StringIO(stream_or_string)
else:
stream = stream_or_string
for obj in PythonDeserializer(yaml.load(stream)):
yield obj
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