def validate(self,
value: typing.Any,
*,
strict: bool = False) -> typing.Any:
if value is None and self.allow_null:
return None
elif value is None:
raise self.validation_error("null")
elif not isinstance(value, list):
raise self.validation_error("type")
if (self.min_items is not None and self.min_items == self.max_items
and len(value) != self.min_items):
raise self.validation_error("exact_items")
if self.min_items is not None and len(value) < self.min_items:
if self.min_items == 1:
raise self.validation_error("empty")
raise self.validation_error("min_items")
elif self.max_items is not None and len(value) > self.max_items:
raise self.validation_error("max_items")
# Ensure all items are of the right type.
validated = []
error_messages: typing.List[Message] = []
if self.unique_items:
seen_items = Uniqueness()
for pos, item in enumerate(value):
validator = None
if isinstance(self.items, list):
if pos < len(self.items):
validator = self.items[pos]
elif isinstance(self.additional_items, Field):
validator = self.additional_items
elif self.items is not None:
validator = self.items
if validator is None:
validated.append(item)
else:
item, error = validator.validate_or_error(item, strict=strict)
if error:
error_messages += error.messages(add_prefix=pos)
else:
validated.append(item)
if self.unique_items:
if item in seen_items:
text = self.get_error_text("unique_items")
message = Message(text=text, code="unique_items", key=pos)
error_messages.append(message)
else:
seen_items.add(item)
if error_messages:
raise ValidationError(messages=error_messages)
return validated
def validate(self,
value: typing.Any,
*,
strict: bool = False) -> typing.Any:
if value is None and self.allow_null:
return None
elif value is None:
raise self.validation_error("null")
elif value not in Uniqueness([key for key, value in self.choices]):
if value == "":
if self.allow_null and not strict:
return None
raise self.validation_error("required")
raise self.validation_error("choice")
return value