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@nicolaiarocci
Created January 5, 2015 10:09
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Validating complex user objects with Cerberus
import copy
from cerberus import Validator
from cerberus import errors
from collections import Mapping, Sequence
class ObjectValidator(Validator):
def __init__(self, *args, **kwargs):
self.allow_unknown = True
super(ObjectValidator, self).__init__(*args, **kwargs)
def validate_object(self, obj):
return self.validate(obj.__dict__)
def _validate_type_object(self, field, value):
# objects which are not Mapping or Sequence types are allowed.
# (Mapping and Sequence types are dealt elsewhere.)
if not (isinstance(value, object) and \
not isinstance(value, (Sequence, Mapping))):
self._error(field, errors.ERROR_BAD_TYPE % "object")
def _validate_schema(self, schema, field, value):
if isinstance(value, (Sequence, Mapping)):
super(ObjectValidator, self)._validate_schema(schema, field, value)
elif isinstance(value, object):
validator = copy.copy(self)
validator.schema = schema
validator.validate(value.__dict__, context=self.document)
if len(validator.errors):
self._error(field, validator.errors)
@henri-hulski
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For Cerberus 1.0 it should be:

    def _validate_type_object(self, value):
        # objects which are not Mapping or Sequence types are allowed.
        # (Mapping and Sequence types are dealt elsewhere.)
        if isinstance(value, object) and \
                not isinstance(value, (Sequence, Mapping)):
            return True

@henri-hulski
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__init__ works only if swapping around:

    def __init__(self, *args, **kwargs):
        super(ObjectValidator, self).__init__(*args, **kwargs)
        self.allow_unknown = True

@liberforce
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if len(validator.errors):

if validator.errors:

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