Source code for jina.drivers.querylang.sort

__copyright__ = "Copyright (c) 2020 Jina AI Limited. All rights reserved."
__license__ = "Apache-2.0"

from typing import Iterable, Tuple

from ...types.querylang.queryset.dunderkey import dunder_get
from .. import QuerySetReader, ContextAwareRecursiveMixin, BaseRecursiveDriver

if False:
    from ...types.sets import DocumentSet


[docs]class SortQL(QuerySetReader, ContextAwareRecursiveMixin, BaseRecursiveDriver): """Sorts the incoming of the documents by the value of a given field. It can also work in reverse mode Example:: - !ReduceAllDriver with: traversal_paths: ['m'] - !SortQL with: reverse: true field: 'score__value' traversal_paths: ['m'] - !SliceQL with: start: 0 end: 50 traversal_paths: ['m'] `SortQL` will ensure that only the documents are sorted by the score value before slicing the first top 50 documents :param field: the value of the field drives the sort of the iterable docs :param reverse: sort the value from big to small :param traversal_paths: the traversal paths :param args: additional positional arguments which are just used for the parent initialization :param kwargs: additional key value arguments which are just used for the parent initialization """ def __init__( self, field: str, reverse: bool = False, traversal_paths: Tuple[str] = ('r',), *args, **kwargs ): super().__init__(traversal_paths=traversal_paths, *args, **kwargs) self._reverse = reverse self._field = field def _apply_all( self, doc_sequences: Iterable['DocumentSet'], *args, **kwargs ) -> None: for docs in doc_sequences: docs.sort(key=lambda x: dunder_get(x, self.field), reverse=self.reverse)