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allow_unknown does not respect custom validators #66

OptiverTimAll opened this Issue Jan 30, 2015 · 1 comment


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OptiverTimAll commented Jan 30, 2015

The Cerberus API allows custom validation properties and custom validation types to be added by creating a class that inherits from cerberus.Validator. It also allows validation rules to be supplied for arbitrary fields, via the allow_unknown property. However, the schema for unknown properties cannot make use of custom validation properties and custom validation types.

For example:

from cerberus import Validator

class CustomValidator(Validator):

    def _validate_type_foo(self, field, value):
        if not value == "foo":
            self.error(field, "Expected a foo")

v = CustomValidator({})
v.allow_unknown = {"type": "foo"}

v.validate( { "fred": "foo", "barney": "foo" } )

I would expect the call to .validate() to approve that document, but instead
I get a traceback:

Traceback (most recent call last):
  File "", line 13, in <module>
    v.validate( { "fred": "foo", "barney": "foo" } )
  File "cerberus/", line 165, in validate
    return self._validate(document, schema, update=update, context=context)
  File "cerberus/", line 228, in _validate
  File "cerberus/", line 118, in __init__
  File "cerberus/", line 278, in validate_schema
    errors.ERROR_UNKNOWN_TYPE % value)
cerberus.cerberus.SchemaError: unrecognized data-type 'foo'

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nicolaiarocci commented Feb 2, 2015

thanks should be fixed now.

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