def check_type(self, value, attr, data):
"""Check if the type of the value is one of the possible choices.
Possible choices are the model classes bound to the possible schemas.
"""
if self.many and not is_collection(value):
raise self._not_expected_type(value,
Iterable,
fields=[self],
field_names=attr,
data=data)
_check_type = super().check_type
errors = []
values = value if self.many else [value]
for idx, v in enumerate(values):
try:
_check_type(v, idx, values)
except ValidationError as err:
errors.append(err.messages)
if errors:
errors = errors if self.many else errors[0]
raise ValidationError(errors)
return value
def check_type(self, value, attr, data):
"""Validate if the value is of the type of the schema's model.
Assumes the nested schema is a ``BaseSchema``.
"""
if self.many and not is_collection(value):
raise self._not_expected_type(value,
Iterable,
fields=[self],
field_names=attr,
data=data)
_check_type = super().check_type
errors = []
values = value if self.many else [value]
for idx, v in enumerate(values):
try:
_check_type(v, idx, values)
except ValidationError as err:
errors.append(err.messages)
if errors:
errors = errors if self.many else errors[0]
raise ValidationError(errors)
return value
def _serialize(self, value, key, obj):
"""Override ``_serialize`` for customizing the exception raised."""
try:
return super()._serialize(value, key, obj)
except TypeError as ex:
if 'serialization_schema_selector' in str(ex):
raise ValidationError('Data from an invalid schema')
raise
def check_type(self, value, attr, data):
"""Validate if it's a list of valid item-field values.
Check if each element in the list can be validated by the item-field
passed during construction.
"""
super().check_type(value, attr, data)
errors = []
for idx, v in enumerate(value):
try:
self.container.check_type(v, idx, value)
except ValidationError as err:
errors.append(err.messages)
if errors:
raise ValidationError(errors)
return value