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import types
from django.db import models
from django.utils import simplejson as json
from django.core.serializers.json import DateTimeAwareJSONEncoder
from decimal import *
def json_encode(data):
"""
    The main issues with django's default json serializer is that properties that
    had been added to a object dynamically are being ignored (and it also has 
    problems with some models).
    """

def _any(data):
ret = None
if type(data) is types.ListType:
ret = _list(data)
elif type(data) is types.DictType:
ret = _dict(data)
elif isinstance(data, Decimal):
# json.dumps() cant handle Decimal
ret = str(data)
elif isinstance(data, models.query.QuerySet):
# Actually its the same as a list ...
ret = _list(data)
elif isinstance(data, models.Model):
ret = _model(data)
else:
ret = data
return ret

def _model(data):
ret = {}
# If we only have a model, we only want to encode the fields.
for f in data._meta.fields:
ret[f.attname] = _any(getattr(data, f.attname))
# And additionally encode arbitrary properties that had been added.
fields = dir(data.__class__) + ret.keys()
add_ons = [k for k in dir(data) if k not in fields]
for k in add_ons:
ret[k] = _any(getattr(data, k))
return ret

def _list(data):
ret = []
for v in data:
ret.append(_any(v))
return ret

def _dict(data):
ret = {}
for k,v in data.items():
ret[k] = _any(v)
return ret

ret = _any(data)

return json.dumps(ret, cls=DateTimeAwareJSONEncoder)

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