GMaps related JS changed to use new google namespace.
Google is going to change permanently in the future the way to
load its services, so better stay safe.
Also this commit shows uses of the new melange.js module.
Fixes Issue 634.
"""
Interfaces for serializing Django objects.
Usage::
from django.core import serializers
json = serializers.serialize("json", some_query_set)
objects = list(serializers.deserialize("json", json))
To add your own serializers, use the SERIALIZATION_MODULES setting::
SERIALIZATION_MODULES = {
"csv" : "path.to.csv.serializer",
"txt" : "path.to.txt.serializer",
}
"""
from django.conf import settings
# Built-in serializers
BUILTIN_SERIALIZERS = {
"xml" : "django.core.serializers.xml_serializer",
"python" : "django.core.serializers.python",
"json" : "django.core.serializers.json",
}
# Check for PyYaml and register the serializer if it's available.
try:
import yaml
BUILTIN_SERIALIZERS["yaml"] = "django.core.serializers.pyyaml"
except ImportError:
pass
_serializers = {}
def register_serializer(format, serializer_module, serializers=None):
""""Register a new serializer.
``serializer_module`` should be the fully qualified module name
for the serializer.
If ``serializers`` is provided, the registration will be added
to the provided dictionary.
If ``serializers`` is not provided, the registration will be made
directly into the global register of serializers. Adding serializers
directly is not a thread-safe operation.
"""
module = __import__(serializer_module, {}, {}, [''])
if serializers is None:
_serializers[format] = module
else:
serializers[format] = module
def unregister_serializer(format):
"Unregister a given serializer. This is not a thread-safe operation."
del _serializers[format]
def get_serializer(format):
if not _serializers:
_load_serializers()
return _serializers[format].Serializer
def get_serializer_formats():
if not _serializers:
_load_serializers()
return _serializers.keys()
def get_public_serializer_formats():
if not _serializers:
_load_serializers()
return [k for k, v in _serializers.iteritems() if not v.Serializer.internal_use_only]
def get_deserializer(format):
if not _serializers:
_load_serializers()
return _serializers[format].Deserializer
def serialize(format, queryset, **options):
"""
Serialize a queryset (or any iterator that returns database objects) using
a certain serializer.
"""
s = get_serializer(format)()
s.serialize(queryset, **options)
return s.getvalue()
def deserialize(format, stream_or_string):
"""
Deserialize a stream or a string. Returns an iterator that yields ``(obj,
m2m_relation_dict)``, where ``obj`` is a instantiated -- but *unsaved* --
object, and ``m2m_relation_dict`` is a dictionary of ``{m2m_field_name :
list_of_related_objects}``.
"""
d = get_deserializer(format)
return d(stream_or_string)
def _load_serializers():
"""
Register built-in and settings-defined serializers. This is done lazily so
that user code has a chance to (e.g.) set up custom settings without
needing to be careful of import order.
"""
global _serializers
serializers = {}
for format in BUILTIN_SERIALIZERS:
register_serializer(format, BUILTIN_SERIALIZERS[format], serializers)
if hasattr(settings, "SERIALIZATION_MODULES"):
for format in settings.SERIALIZATION_MODULES:
register_serializer(format, settings.SERIALIZATION_MODULES[format], serializers)
_serializers = serializers