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16 lines
426 B
Python
16 lines
426 B
Python
from marshmallow import fields, ValidationError
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class NumericStr(fields.String):
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def _serialize(self, value, attr, obj, **kwargs):
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if value is None:
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return None
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return str(value)
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def _deserialize(self, value, attr, data, **kwargs):
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try:
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return float(value)
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except ValueError as error:
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raise ValidationError("Must be a numeric value.") from error
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