如何使用ElasticSearch索引搜索单词的一部分

Question

I've recently started using ElasticSearch and I can't seem to make it search for a part of a word.

Example: I have three documents from my couchdb indexed in ElasticSearch:

{
 "_id" : "1",
 "name" : "John Doeman",
 "function" : "Janitor"
}
{
 "_id" : "2",
 "name" : "Jane Doewoman",
 "function" : "Teacher"
}
{
 "_id" : "3",
 "name" : "Jimmy Jackal",
 "function" : "Student"
} 

So now, I want to search for all documents containing "Doe"

curl http://localhost:9200/my_idx/my_type/_search?q=Doe

That doesn't return any hits. But if I search for

curl http://localhost:9200/my_idx/my_type/_search?q=Doeman

It does return one document (John Doeman).

Am trying with this url http://localhost/el/index.php?str=*doe*.

<?php
require 'vendor/autoload.php';
$client = Elasticsearch\ClientBuilder::create()->build();

$params = array();
$params['index'] = 's3';
$params['type'] = 's3files';
$params['body']['query']['match']['content'] = $_GET['str'];

$result = $client->search($params);
echo "<pre>";
print_r($result);

How can I make ElasticSearch find both John Doeman and Jane Doewoman when I search for "Doe" ?

Answer 1

You can simply try using a wildcard first:

curl http://localhost:9200/my_idx/my_type/_search?q=Doe*

If that's enough, you can get away with that. Otherwise, there are other more advanced solutions by creating custom analyzers with edge ngram tokenizers and filters.