google.appengine.api.search.MatchScorer

Assigns a document score based on term frequency.

Inherits From: expected_type

google.appengine.api.search.MatchScorer()

If you add a MatchScorer to a SortOptions as in the following code:

sort_opts = search.SortOptions(match_scorer=search.MatchScorer())

then, this will sort the documents in descending score order. The scores will be positive. If you want to sort in ascending order, then use the following code:

sort_opts = search.SortOptions(match_scorer=search.MatchScorer(),
    expressions=[search.SortExpression(
        expression='_score', direction=search.SortExpression.ASCENDING,
        default_value=0.0)])

The scores in this case will be negative.

TypeError If any of the parameters has an invalid type, or an unknown attribute is passed.
ValueError If any of the parameters has an invalid value.