# Specifying term vectors at document insertion time?

**URL:** <https://discuss.elastic.co/t/specifying-term-vectors-at-document-insertion-time/44367>\
**Category:** Elasticsearch\
**Created:** [March 14, 2016, 8:21pm UTC](https://discuss.elastic.co/t/specifying-term-vectors-at-document-insertion-time/44367 "2016-03-14T20:21:03Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![wumpus](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wumpus/32/8471_2.png) [@wumpus](https://discuss.elastic.co/u/wumpus)\
**Post date:** [March 14, 2016, 8:21pm UTC](https://discuss.elastic.co/t/specifying-term-vectors-at-document-insertion-time/44367/1 "2016-03-14T20:21:03Z")

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I'm building a search engine for which I already know the weights of every term. I'd like to be able to specify these weights at document insertion time, replacing TF-IDF. Is it possible to overwrite the term\_vector?

Surfing around I see solutions using payloads, but those also need a function\_score & are slow.

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**Author:** ![wumpus](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/wumpus/32/8471_2.png) [@wumpus](https://discuss.elastic.co/u/wumpus)\
**Post date:** [March 18, 2016, 9:48pm UTC](https://discuss.elastic.co/t/specifying-term-vectors-at-document-insertion-time/44367/2 "2016-03-18T21:48:00Z")

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I ended up using the delimited payload token filter example from here:

> <https://stackoverflow.com/questions/21439013/elasticsearch-influence-scoring-with-custom-score-field-in-document>

combined with limiting the script to a rescore, for performance reasons. This is a lot harder than it ought to be! The completion suggester is a good existing example of how to allow easy specification of ranking info in Elastic.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 5, 2017, 11:07pm UTC](https://discuss.elastic.co/t/specifying-term-vectors-at-document-insertion-time/44367/3 "2017-07-05T23:07:00Z")

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