Method get

nextpy/data/jsondb.py:224–247

Retrieves an instance from the database by its ID. Args: id_value (int): The ID of the instance to retrieve. Returns: Optional[T]: The retrieved instance, or None if not found. Raises: TypeError: If id_value is not an integer.

(self, id_value: int)

        return [self.model(**record) for record in filtered_data]  # type: ignore

    def get(self, id_value: int) -> Optional[T]:
        """Retrieves an instance from the database by its ID.

        Args:
            id_value (int): The ID of the instance to retrieve.

        Returns:
            Optional[T]: The retrieved instance, or None if not found.

        Raises:
            TypeError: If id_value is not an integer.
            IdNotFoundError: If no instance with the given ID is found.
        """
        if not isinstance(id_value, int):
            raise TypeError(
                f"Expected id_value to be an int, got {type(id_value).__name__} instead."
            )

        data = self._read_data()["data"]
        for record in data:
            if record.get(self.id_fieldname) == id_value:
                return self.model(**record)  # type: ignore

        raise IdNotFoundError(f"Id {id_value!r} does not exist.")

    def delete(self, id_value: int) -> None:
        """Deletes an instance from the database by its ID.