我正在尝试创建一个在 Elasticsearch 索引上运行模糊搜索的函数。 仅当我指定的术语与索引中的拼写完全一致时,我才会获得匹配项。如果我故意拼错该术语中的一个字母,例如
"Boc"
,我想模糊搜索应该仍然返回相同的匹配项,但它不返回任何内容。同样,如果我用 prefixQuery 或 termQuery 替换 fuzzyMatch,则搜索仅在给出准确拼写的情况下返回结果
"Bob"
这是为什么呢?我该如何解决?哪里有解释这些方法的文档?
这是我的代码...
public void searchResults(@PathParam("index_name") String index_name) throws IOException {
RestHighLevelClient client = createHighLevelRestClient();
int numberOfSearchHitsToReturn = 100; // defaults to 10
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
sourceBuilder.query(QueryBuilders.fuzzyQuery("firstname", "Bob"));
sourceBuilder.from(0);
sourceBuilder.size(numberOfSearchHitsToReturn);
sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
SearchRequest searchRequest = new SearchRequest(index_name).source(sourceBuilder);
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
System.out.print(searchResponse);
client.close();
}
这是在 Postman 中 Get/index/_search 的结果...
{
"took": 0,
"timed_out": false,
"_shards": {
"total": 1,
"successful": 1,
"skipped": 0,
"failed": 0
},
"hits": {
"total": {
"value": 3,
"relation": "eq"
},
"max_score": 1.0,
"hits": [
{
"_index": "contacts",
"_type": "_doc",
"_id": "J1NDonABNQ4iHt4UOM4u",
"_score": 1.0,
"_source": {}
},
{
"_index": "contacts",
"_type": "_doc",
"_id": "153",
"_score": 1.0,
"_source": {
"firstname": "Bob",
"home_city": "San Diego",
"home_address": "1029 Loring Street",
"home_zip": "92109",
"contact_id": "153",
"email": "bsmith@gmail.com",
"lastname": "Smith",
"home_state": "California",
"cell_phone": "6192542981"
}
},
{
"_index": "contacts",
"_type": "_doc",
"_id": "154",
"_score": 1.0,
"_source": {
"firstname": "Alice",
"home_city": "Paia",
"home_address": "581 Pili Loko Street",
"home_zip": "00012",
"contact_id": "154",
"email": "aHernes@gmail.com",
"lastname": "Hernes",
"home_state": "Hawaii",
"cell_phone": "8083829103"
}
}
]
}
}
最佳答案
我相信弹性会让你有点困惑。
3 个字母项的模糊函数为 1,因此您期望返回“Bob”是很公平的。但是,我假设您使用默认使用过滤器的标准分析器 “小写”。
因此计算出的“Boc”和“bob”之间的编辑距离是2,这就是不返回它的原因。
尝试小写输入项,我打赌将返回“Bob”。
// no results
{
"query": {
"fuzzy" : { "firstname" : "Boc" }
}
}
// "Bob" returned
{
"query": {
"fuzzy" : { "firstname" : "boc" }
}
}
这有意义吗?
关于您的代码:
public void searchResults(@PathParam("index_name") String index_name) throws IOException {
RestHighLevelClient client = createHighLevelRestClient();
int numberOfSearchHitsToReturn = 100; // defaults to 10
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
// "Boc".toLowerCase() or simply "boc"
sourceBuilder.query(QueryBuilders.fuzzyQuery("firstname", "Boc".toLowerCase()));
sourceBuilder.from(0);
sourceBuilder.size(numberOfSearchHitsToReturn);
sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
SearchRequest searchRequest = new SearchRequest(index_name).source(sourceBuilder);
SearchResponse searchResponse = client.search(searchRequest, RequestOptions.DEFAULT);
System.out.print(searchResponse);
client.close();
}
关于java - 为什么 filterQuery 在 Elastic Search 的 JAVA 高级 REST 客户端中不起作用?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60519252/