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def test_get_default_value_for_field_without_default_value():
@dataclass
class X:
i: int
with pytest.raises(DefaultValueNotFoundError):
get_default_value_for_field(field=fields(X)[0])
try:
try:
field_data = data[field.name]
transformed_value = transform_value(
type_hooks=config.type_hooks, cast=config.cast, target_type=field.type, value=field_data
)
value = _build_value(type_=field.type, data=transformed_value, config=config)
except DaciteFieldError as error:
error.update_path(field.name)
raise
if config.check_types and not is_instance(value, field.type):
raise WrongTypeError(field_path=field.name, field_type=field.type, value=value)
except KeyError:
try:
value = get_default_value_for_field(field)
except DefaultValueNotFoundError:
if not field.init:
continue
raise MissingValueError(field.name)
if field.init:
init_values[field.name] = value
else:
post_init_values[field.name] = value
return create_instance(data_class=data_class, init_values=init_values, post_init_values=post_init_values)
def get_default_value_for_field(field: Field) -> Any:
if field.default != MISSING:
return field.default
elif field.default_factory != MISSING: # type: ignore
return field.default_factory() # type: ignore
elif is_optional(field.type):
return None
raise DefaultValueNotFoundError()