35 lines
969 B
Python
35 lines
969 B
Python
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from peewee import Expression, Field
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from ..utils import HalfVector
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class HalfVectorField(Field):
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field_type = 'halfvec'
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def __init__(self, dimensions=None, *args, **kwargs):
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self.dimensions = dimensions
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super(HalfVectorField, self).__init__(*args, **kwargs)
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def get_modifiers(self):
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return self.dimensions and [self.dimensions] or None
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def db_value(self, value):
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return HalfVector._to_db(value)
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def python_value(self, value):
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return HalfVector._from_db(value)
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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 l2_distance(self, vector):
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return self._distance('<->', vector)
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def max_inner_product(self, vector):
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return self._distance('<#>', vector)
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def cosine_distance(self, vector):
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return self._distance('<=>', vector)
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def l1_distance(self, vector):
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return self._distance('<+>', vector)
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