def validate_type(subject, value, type_):
with validates(f'{subject} type'):
if not isinstance(value, type_):
raise ValidationError(
upper_first(
f'{subject} must be {HUMANIZED_TYPE_NAMES.get(type_, type_.__name__)}'
))
def validate_exact_value(subject, value, expected_value):
with validates(f'{subject} value'):
if value != expected_value:
raise ValidationError(
upper_first(f'{subject} must be equal to {expected_value}'))
def validate_greater_than_zero(subject, value):
with validates(f'{subject} value'):
if value <= 0:
raise ValidationError(
upper_first(f'{subject} must be greater than zero'))
def validate_in(subject, value, value_set):
with validates(f'{subject} value'):
if value not in value_set:
value_set_str = ', '.join(map(str, value_set))
raise ValidationError(
upper_first(f'{subject} must be one of {value_set_str}'))
def validate_lt_value(subject, value, max_):
with validates(f'{subject} value'):
if value >= max_:
raise ValidationError(
upper_first(f'{subject} must be less than {max_}'))
def validate_lte_value(subject, value, max_):
with validates(f'{subject} value'):
if value > max_:
raise ValidationError(
upper_first(f'{subject} must be less or equal to {max_}'))
def validate_gt_value(subject, value, min_):
with validates(f'{subject} value'):
if value <= min_:
raise ValidationError(
upper_first(f'{subject} must be greater than {min_}'))
def validate_min_item_count(subject, value, min_):
with validates(f'{subject} item count'):
if len(value) < min_:
raise ValidationError(
upper_first(f'{subject} must contain at least {min_} items'))
def validate_is_none(subject, value):
with validates(f'{subject} value'):
if value is not None:
raise ValidationError(upper_first(f'{subject} must not be set'))
def validate_empty(subject, value):
with validates(f'{subject} value'):
if value:
raise ValidationError(upper_first(f'{subject} must be empty'))
def validate_hexadecimal(subject, value):
with validates(f'{subject} value'):
try:
hexstr(value).to_bytes()
except ValueError:
raise ValidationError(upper_first(f'{subject} must be hexadecimal string'))
