Method __getitem__

tortoise/queryset.py:545–576

Query offset and limit for Queryset. :raises ParamsError: QuerySet indices must be slices. :raises ParamsError: Slice steps should be 1 or None. :raises ParamsError: Slice start should be non-negative number or None. :raises ParamsError: Slice stop should

(self, key: slice)

        return queryset

    def __getitem__(self, key: slice) -> QuerySet[MODEL]:
        """
        Query offset and limit for Queryset.

        :raises ParamsError: QuerySet indices must be slices.

        :raises ParamsError: Slice steps should be 1 or None.

        :raises ParamsError: Slice start should be non-negative number or None.

        :raises ParamsError: Slice stop should be non-negative number greater that slice start,
        or None.
        """
        if not isinstance(key, slice):
            raise ParamsError("QuerySet indices must be slices.")

        if not (key.step is None or (isinstance(key.step, int) and key.step == 1)):
            raise ParamsError("Slice steps should be 1 or None.")

        start = key.start if key.start is not None else 0

        if not isinstance(start, int) or start < 0:
            raise ParamsError("Slice start should be non-negative number or None.")
        if key.stop is not None and (not isinstance(key.stop, int) or key.stop <= start):
            raise ParamsError(
                "Slice stop should be non-negative number greater that slice start, or None.",
            )

        queryset = self.offset(start)
        if key.stop:
            queryset = queryset.limit(key.stop - start)
        return queryset

    def distinct(self) -> QuerySet[MODEL]:
        """