Module aws_lambda_powertools.utilities.idempotency.serialization.dataclass

Classes

class DataclassSerializer (model: type[DataClass])

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class DataclassSerializer(BaseIdempotencyModelSerializer):
    """
    A serializer class for transforming data between dataclass objects and dictionaries.
    """

    def __init__(self, model: type[DataClass]):
        """
        Parameters
        ----------
        model: type[DataClass]
            A dataclass type to be used for serialization and deserialization
        """
        self.__model: type[DataClass] = model

    def to_dict(self, data: DataClass) -> dict:
        return asdict(data)

    def from_dict(self, data: dict) -> DataClass:
        return self.__model(**data)

    @classmethod
    def instantiate(cls, model_type: Any) -> BaseIdempotencySerializer:

        model_type = get_actual_type(model_type=model_type)

        if model_type is None:
            raise IdempotencyNoSerializationModelError("No serialization model was supplied")

        if not is_dataclass(model_type):
            raise IdempotencyModelTypeError("Model type is not inherited of dataclass type")
        return cls(model=model_type)  # type: ignore[arg-type]

A serializer class for transforming data between dataclass objects and dictionaries.

Parameters

model : type[DataClass]

A dataclass type to be used for serialization and deserialization

Ancestors

• BaseIdempotencyModelSerializer
• BaseIdempotencySerializer
• abc.ABC

Methods

def from_dict(self, data: dict) ‑> Any

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def from_dict(self, data: dict) -> DataClass:
    return self.__model(**data)

def to_dict(self, data: DataClass) ‑> dict

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def to_dict(self, data: DataClass) -> dict:
    return asdict(data)

Inherited members

• BaseIdempotencyModelSerializer:
  • instantiate