How to Properly Implement Nested Queries in Elasticsearch 7.16 with Spring Data?
This might be a silly question, but I'm trying to debug I tried several approaches but none seem to work. I'm working on a Spring Boot application that integrates with Elasticsearch 7.16, and I'm struggling to implement nested queries for my data. My Elasticsearch index contains a nested type for comments associated with blog posts, and I want to retrieve all blog posts that have at least one comment with a specific keyword. Despite following the documentation, my query returns no results, even though I know there are matching documents. Here's the structure of my Elasticsearch index: ```json { "mappings": { "properties": { "title": { "type": "text" }, "content": { "type": "text" }, "comments": { "type": "nested", "properties": { "author": { "type": "keyword" }, "message": { "type": "text" } } } } } } ``` I've tried to construct the nested query using Spring Data Elasticsearch like this: ```java QueryBuilder query = QueryBuilders.nestedQuery( "comments", QueryBuilders.matchQuery("comments.message", "great post"), ScoreMode.Total ); SearchQuery searchQuery = new NativeSearchQueryBuilder() .withQuery(query) .build(); List<BlogPost> results = elasticsearchTemplate.queryForList(searchQuery, BlogPost.class); ``` However, I'm getting an empty list as a result, and I checked the underlying data in Kibana, where I can confirm that there are indeed comments containing the keyword "great post". I've also checked the mapping and confirmed that the comments field is correctly set as nested. I even tried using a simple match query on the main document fields, and that worked fine, so the scenario seems to be specifically with the nested query. Any ideas on what I'm missing or if I need to adjust the query syntax? Thank you! I'm working on a API that needs to handle this. Any help would be greatly appreciated! I'm working in a Ubuntu 22.04 environment. Any advice would be much appreciated. Has anyone else encountered this?