2018-07-02 17:44:36 -04:00
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[[painless-weight-context]]
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=== Weight context
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Use a Painless script to create a
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2018-07-25 13:59:25 -04:00
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{ref}/index-modules-similarity.html[weight] for use in a
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2018-12-03 12:34:15 -05:00
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<<painless-similarity-context, similarity script>>. The weight makes up the
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part of the similarity calculation that is independent of the document being
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scored, and so can be built up front and cached.
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Queries that contain multiple terms calculate a separate weight for each term.
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2018-07-02 17:44:36 -04:00
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*Variables*
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`params` (`Map`, read-only)::
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User-defined parameters passed in as part of the query.
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`query.boost` (`float`, read-only)::
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The boost value if provided by the query. If this is not provided the
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value is `1.0f`.
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`field.docCount` (`long`, read-only)::
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The number of documents that have a value for the current field.
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`field.sumDocFreq` (`long`, read-only)::
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The sum of all terms that exist for the current field. If this is not
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available the value is `-1`.
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`field.sumTotalTermFreq` (`long`, read-only)::
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The sum of occurrences in the index for all the terms that exist in the
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current field. If this is not available the value is `-1`.
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`term.docFreq` (`long`, read-only)::
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The number of documents that contain the current term in the index.
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`term.totalTermFreq` (`long`, read-only)::
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The total occurrences of the current term in the index.
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*Return*
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`double`::
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A scoring factor used across all documents.
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*API*
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The standard <<painless-api-reference, Painless API>> is available.
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