elasticsearch - 弹性词查询的意外结果

Question

我只有在http://localhost:9200上运行Elastic 2.4才能进行测试。

建立

作为新的开始，我在索引中创建了1个项目，但只有1个项目。

$ curl -s -XPUT "http://localhost:9200/movies/movie/1" -d'
{
    "title": "The Godfather",
    "director": "Francis Ford Coppola",
    "year": 1972,
    "genres": ["Crime", "Drama"]
}'

退货

{"_index":"movies","_type":"movie","_id":"1","_version":3,"_shards":{"total":2,"successful":1,"failed":0},"created":false}

然后，我运行以下命令以确认索引有效:

$ curl -s -XPOST "http://localhost:9200/movies/_search" -d'
{
    "query": {
        "query_string": {
            "query": "Godfather"
        }
    }
}'

退货

{"took":8,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":1,"max_score":0.095891505,"hits":[{"_index":"movies","_type":"movie","_id":"1","_score":0.095891505,"_source":
{
    "title": "The Godfather",
    "director": "Francis Ford Coppola",
    "year": 1972,
    "genres": ["Crime", "Drama"]
}}]}}

问题

我试图像这样运行术语查询:

$ curl -s -XPOST "http://localhost:9200/movies/_search" -d'
{
    "query": {
        "term": {"title": "The Godfather"}
    }
}'

我应该得到1个结果，相反我得到了:

{"took":1,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":0,"max_score":null,"hits":[]}}

我怎么了

Answer 1

建议使用类似于jay的match_phrase，或者您需要创建一个not_analyzed子字段(例如title.raw)，如下所示:

$ curl -s -XPUT "http://localhost:9200/movies/_mapping/movie" -d'
{
    "properties": {
        "title": {
            "type": "string",
            "fields": {
               "raw": {
                   "type": "string",
                   "index": "not_analyzed"
               }
            }
        }
    }
}'

然后，您可以为文档重新索引以填充 title.raw:

$ curl -s -XPUT "http://localhost:9200/movies/movie/1" -d'
{
    "title": "The Godfather",
    "director": "Francis Ford Coppola",
    "year": 1972,
    "genres": ["Crime", "Drama"]
}'

最后，您的字词查询将在 title.raw子字段上工作:

$ curl -s -XPOST "http://localhost:9200/movies/_search" -d'
{
    "query": {
        "term": {"title.raw": "The Godfather"}
    }
}'