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    <p>There are different ways to achieve what you want. I'd say it depends on the way you want to make prefix matches. You can use a <a href="http://www.elasticsearch.org/guide/reference/query-dsl/prefix-query.html" rel="nofollow">Prefix Query</a> or make <a href="http://www.elasticsearch.org/guide/reference/index-modules/analysis/edgengram-tokenizer.html" rel="nofollow">EdgeNGrams</a> out of the user field and search on it without the need of a prefix query. The first option is a little bit slower, while the second one causes an increasement of your index size since you'd index more terms (the ngrams).</p> <p>If you decide for the prefix query you need to combine different queries together. You can do that using the <a href="http://www.elasticsearch.org/guide/reference/query-dsl/bool-query.html" rel="nofollow">bool query</a>. You just need to decide which queries must match, which ones must not match and which ones should match (if they are optional). You can also give a boost to each query in order to express that prefix matches are more important for example.</p> <p>On the other hand, if you decide to index EdgeNGrams you can use a single <a href="http://www.elasticsearch.org/guide/reference/query-dsl/query-string-query.html" rel="nofollow">query string</a> and search on different fields giving a different weight to them, like this:</p> <pre><code>{ "query" : { "query_string" : { "fields" : "user.ngrams^3 field1^2 field2", "query" : "query" } } } </code></pre> <p>You also need to take into account that the query string allows you to search for multiple terms (a boolean query is generated out of them) and to use the <a href="http://www.lucenetutorial.com/lucene-query-syntax.html" rel="nofollow">lucene query syntax</a>. Also, the query string is analyzed while the prefix query is not. It all depends on what you need and whether those features are useful for your usecase.</p> <p>Let me know if you need more information.</p>
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    1. POHow can I do a prefix search in ElasticSearch in addition to a generic query string?
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