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import re |
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from fields import __base__ |
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from fields import _SealerWrapper |
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from fields import _Factory |
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class ValidationError(Exception): |
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pass |
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def regex_validation_sealer(fields, defaults, RegexType=type(re.compile(""))): |
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""" |
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Example sealer that just does regex-based validation. |
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""" |
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required = set(fields) - set(defaults) |
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if required: |
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raise TypeError( |
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"regex_validation_sealer doesn't support required arguments. Fields that need fixing: %s" % required) |
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klass = None |
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kwarg_validators = dict( |
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(key, val if isinstance(val, RegexType) else re.compile(val)) for key, val in defaults.items() |
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) |
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arg_validators = list( |
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kwarg_validators[key] for key in fields |
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) |
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def __init__(self, *args, **kwargs): |
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for pos, (value, validator) in enumerate(zip(args, arg_validators)): |
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if not validator.match(value): |
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raise ValidationError("Positional argument %s failed validation. %r doesn't match regex %r" % ( |
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pos, value, validator.pattern |
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)) |
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for key, value in kwargs.items(): |
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if key in kwarg_validators: |
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validator = kwarg_validators[key] |
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if not validator.match(value): |
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raise ValidationError("Keyword argument %r failed validation. %r doesn't match regex %r" % ( |
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key, value, validator.pattern |
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)) |
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super(klass, self).__init__(*args, **kwargs) |
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klass = type("RegexValidateBase", (__base__,), dict( |
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__init__=__init__, |
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)) |
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return klass |
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RegexValidate = _Factory(sealer=_SealerWrapper(regex_validation_sealer)) |
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ionelmc /
python-fields
