MatchScorer
allows you to sort documents based on the quality
of query match. The scorer assigns a score based on term frequency in a document. To use a MatchScorer
, add it to the SortOptions
as in the following code:
sort_opts = search . SortOptions ( match_scorer = search . MatchScorer ())
This sorts 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.
MatchScorer
is defined in the google.appengine.api.search
module.
Constructor
The constructor for class MatchScorer
is defined as follows:
- class MatchScorer ()
-
Assigns a document score to search results representing how well they match the query, base on frequency of terms in the document.
Result value
-
A new instance of class
MatchScorer.
Exceptions
- TypeError
-
If any of the parameters have an invalid type, or an unknown attribute is passed.
- ValueError
-
If any parameter has an invalid value.
-
