def default(obj):
# We preserve key order when rendering SON, DBRef, etc. as JSON by
# returning a SON for those types instead of a dict. This works with
# the "json" standard library in Python 2.6+ and with simplejson
# 2.1.0+ in Python 2.5+, because those libraries iterate the SON
# using PyIter_Next. Python 2.4 must use simplejson 2.0.9 or older,
# and those versions of simplejson use the lower-level PyDict_Next,
# which bypasses SON's order-preserving iteration, so we lose key
# order in Python 2.4.
if isinstance(obj, ObjectId):
return {"$oid": str(obj)}
if isinstance(obj, DBRef):
return _json_convert(obj.as_doc())
if isinstance(obj, datetime.datetime):
# TODO share this code w/ bson.py?
if obj.utcoffset() is not None:
obj = obj - obj.utcoffset()
millis = int(calendar.timegm(obj.timetuple()) * 1000 +
obj.microsecond / 1000)
return {"$date": millis}
if isinstance(obj, (RE_TYPE, Regex)):
flags = ""
if obj.flags & re.IGNORECASE:
flags += "i"
if obj.flags & re.LOCALE:
flags += "l"
if obj.flags & re.MULTILINE:
flags += "m"
if obj.flags & re.DOTALL:
flags += "s"
if obj.flags & re.UNICODE:
flags += "u"
if obj.flags & re.VERBOSE:
flags += "x"
if isinstance(obj.pattern, unicode):
pattern = obj.pattern
else:
pattern = obj.pattern.decode('utf-8')
return SON([("$regex", pattern), ("$options", flags)])
if isinstance(obj, MinKey):
return {"$minKey": 1}
if isinstance(obj, MaxKey):
return {"$maxKey": 1}
if isinstance(obj, Timestamp):
return SON([("t", obj.time), ("i", obj.inc)])
if isinstance(obj, Code):
return SON([('$code', str(obj)), ('$scope', obj.scope)])
if isinstance(obj, Binary):
return SON([
('$binary', base64.b64encode(obj).decode()),
('$type', "%02x" % obj.subtype)])
if PY3 and isinstance(obj, binary_type):
return SON([
('$binary', base64.b64encode(obj).decode()),
('$type', "00")])
if bson.has_uuid() and isinstance(obj, bson.uuid.UUID):
return {"$uuid": obj.hex}
raise TypeError("%r is not JSON serializable" % obj)
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