# Using elasticsearch enterprise app search with langchain for vector query

**URL:** https://discuss.elastic.co/t/using-elasticsearch-enterprise-app-search-with-langchain-for-vector-query/349810
**Category:** Elastic Search
**Tags:** elastic-app-search
**Created:** [December 21, 2023, 4:07pm UTC](https://discuss.elastic.co/t/using-elasticsearch-enterprise-app-search-with-langchain-for-vector-query/349810 "2023-12-21T16:07:28Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![elitzur\_e](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/elitzur_e/32/48445_2.png) [@elitzur\_e](https://discuss.elastic.co/u/elitzur_e)
#### Post date: [December 21, 2023, 4:07pm UTC](https://discuss.elastic.co/t/using-elasticsearch-enterprise-app-search-with-langchain-for-vector-query/349810/1 "2023-12-21T16:07:28Z")

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Hi. i have a working website with app-search and the web crwaler that crewals my site and uses the system created index.  
i am trying to use that data in that index and use it as a source for ai queries.  
i keep getting an error (using langchain platform)  
Programs\Python\Python310\lib\site-packages\elasticsearch\_sync\client\_base.py", line 320, in perform\_request  
raise HTTP\_EXCEPTIONS.get(meta.status, ApiError)(  
elasticsearch.BadRequestError: BadRequestError(400, 'search\_phase\_execution\_exception', 'failed to create query: field [vector] does not exist in the mapping

can i add this "vector" field to my index in appsearch?

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<div class="post-metadata">

### Author: ![xeraa](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/xeraa/32/48181_2.png) [@xeraa](https://discuss.elastic.co/u/xeraa)
#### Post date: [January 12, 2024, 6:36pm UTC](https://discuss.elastic.co/t/using-elasticsearch-enterprise-app-search-with-langchain-for-vector-query/349810/2 "2024-01-12T18:36:53Z")

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How did you set up the crawling? [Build a semantic search experience | Elastic](https://www.elastic.co/getting-started/enterprise-search/build-a-semantic-search-experience#ingest-data-with-the-elastic-web-crawler) has a step by step guide for the webcrawler on how to do vector search.

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<div class="post-metadata">

### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [February 9, 2024, 6:37pm UTC](https://discuss.elastic.co/t/using-elasticsearch-enterprise-app-search-with-langchain-for-vector-query/349810/3 "2024-02-09T18:37:25Z")

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