def filter(self, *expressions):
for (field, op, value) in expressions:
if isinstance(value, (list, set, tuple)):
items = [(field.serialize(item) if
not isinstance(item, string_type) else encode(item))
for item in value]
value = b','.join(items)
elif isinstance(value, string_type):
value = encode(value)
else:
value = field.serialize(value)
self._conditions.append((field.name, op, value))
def serialize(self, value):
if isinstance(value, datetime.datetime):
pass # Note: date is a subclass of datetime.
elif isinstance(value, datetime.date):
value = datetime.datetime(value.year, value.month, value.day)
elif isinstance(value, int):
return encode(str(value * 1000000))
if self._utc:
timestamp = calendar.timegm(value.utctimetuple())
else:
timestamp = time.mktime(value.timetuple())
timestamp = (timestamp * 1000000) + value.microsecond
return encode(str(timestamp))
def serialize_model(model):
buf = io.BytesIO()
for name, field in model.__fields__.items():
if name == 'key': continue
value = getattr(model, name, None)
if value is not None:
buf.write(encode(name))
buf.write(b'\x00')
buf.write(field.serialize(value))
buf.write(b'\x00')
return model.key, buf.getvalue()
def serialize(self, value):
return encode(str(value))
def serialize(self, value):
return encode(value.strftime(self._format))