37 lines
992 B
Python
37 lines
992 B
Python
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import decimal
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from .._gae import ndb
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#TODO Needs more testing
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class NDBDecimalProperty(ndb.StringProperty):
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"""
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NDB decimal implementation
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"""
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data_type = decimal.Decimal
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def __init__(self, precision, scale, **kwargs):
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d = '1.'
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for x in range(scale):
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d += '0'
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self.round = decimal.Decimal(d)
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def _to_base_type(self, value):
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if value is None or value == '':
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return None
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else:
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return str(value)
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def _from_base_type(self, value):
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if value is None or value == '':
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return None
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else:
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return decimal.Decimal(value).quantize(self.round)
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def _validate(self, value):
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if value is None or isinstance(value, decimal.Decimal):
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return value
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elif isinstance(value, basestring):
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return decimal.Decimal(value)
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raise TypeError("Property %s must be a Decimal or string."
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% self._name)
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