Url and Page classes used to encapsulate the "site map" information (URL
regular expressions, Django views, menu item names, etc.) and the relation
between pages in the site map.
There are still lots of TODOs in this first pass.
Patch by: Todd Larsen
Review by: to-be-reviewed
"""
YAML serializer.
Requires PyYaml (http://pyyaml.org/), but that's checked for in __init__.
"""
from django.db import models
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.
"""
internal_use_only = False
def handle_field(self, obj, field):
# A nasty special case: base YAML doesn't support serialization of time
# types (as opposed to dates or datetimes, which it does support). Since
# we want to use the "safe" serializer for better interoperability, we
# need to do something with those pesky times. Converting 'em to strings
# isn't perfect, but it's better than a "!!python/time" type which would
# halt deserialization under any other language.
if isinstance(field, models.TimeField) and getattr(obj, field.name) is not None:
self._current[field.name] = str(getattr(obj, field.name))
else:
super(Serializer, self).handle_field(obj, field)
def end_serialization(self):
self.options.pop('stream', None)
self.options.pop('fields', None)
yaml.safe_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