22 lines
619 B
Python
22 lines
619 B
Python
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from peewee import Expression, Field
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class FixedBitField(Field):
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field_type = 'bit'
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def __init__(self, max_length=None, *args, **kwargs):
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self.max_length = max_length
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super(FixedBitField, self).__init__(*args, **kwargs)
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def get_modifiers(self):
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return self.max_length and [self.max_length] or None
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def _distance(self, op, vector):
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return Expression(lhs=self, op=op, rhs=self.to_value(vector))
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def hamming_distance(self, vector):
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return self._distance('<~>', vector)
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def jaccard_distance(self, vector):
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return self._distance('<%%>', vector)
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