Question

我向http://localhost:9200/movie_db/movie/_search发布了一个查询，但_source属性在返回resposne上始终为空。我启用了它，但这没有帮助。

电影资料库：

TRY DELETE /movie_db
PUT /movie_db {"mappings": {"movie": {"properties": {"title": {"type": "string", "analyzer": "snowball"}, "actors": {"type": "string", "position_offset_gap" : 100, "analyzer": "standard"}, "genre": {"type": "string", "index": "not_analyzed"}, "release_year": {"type": "integer", "index": "not_analyzed"}, "description": {"_source": true, "type": "string", "analyzer": "snowball"}}}}}
BULK INDEX movie_db/movie
{"_id": 1, "title": "Hackers", "release_year": 1995, "genre": ["Action", "Crime", "Drama"], "actors": ["Johnny Lee Miller", "Angelina Jolie"], "description": "High-school age computer expert Zero Cool and his hacker friends take on an evil corporation's computer virus with their hacking skills."}
{"_id": 2, "title": "Johnny Mnemonic", "release": 1995, "genre": ["Science Fiction", "Action"], "actors": ["Keanu Reeves", "Dolph Lundgren"], "description": "A guy with a chip in his head shouts incomprehensibly about room service in this dystopian vision of our future."}
{"_id": 3, "title": "Swordfish", "release_year": 2001, "genre": ["Action", "Crime"], "actors": ["John Travolta", "Hugh Jackman", "Halle Berry"], "description": "A cast of characters challenge society's commonly held view that computer experts are not the beautiful people. Somehow, the CIA is hacked in under 5 minutes."}
{"_id": 4, "title": "Tomb Raider", "release_year": 2001, "genre": ["Adventure", "Action", "Fantasy"], "actors": ["Angelina Jolie", "Jon Voigt"], "description": "The story of a girl and her quest for antiquities in the face of adversity. This epic is adapter from its traditional video-game format to the big screen"}

查询：

{
    "query" : 
    {
        "term" : { "genre" : "Crime" }
    },
}

结果：

{
    "took": 4,
    "timed_out": false,
    "_shards": {
        "total": 5,
        "successful": 5,
        "failed": 0
    },
    "hits": {
        "total": 2,
        "max_score": 0.30685282,
        "hits": [
            {
                "_index": "movie_db",
                "_type": "movie",
                "_id": "3",
                "_score": 0.30685282,
                "_source": {}
            },
            {
                "_index": "movie_db",
                "_type": "movie",
                "_id": "1",
                "_score": 0.30685282,
                "_source": {}
            }
        ]
    }
}

Answer 1

我遇到了同样的问题：尽管在我的查询和我的映射中启用了_source，_source仍然是{}。

你提出的在elasticsearch.yml中设置cluster.name的解决方案给了我一个提示，即问题必须是旧集群中的一些隐藏设置。

我发现我有一个索引模板定义附带了我安装的插件（在我的情况下是elasticsearch-transport-couchbase），其中说

    "_source" : {
      "includes" : [ "meta.*" ]
    },

从而隐含地排除了meta.*以外的所有字段。

检查您的模板：

curl -XGET localhost:9200/_template/?pretty

我删除了couchbase模板，如此

curl -XDELETE localhost:9200/_template/couchbase

并创建了一个新的，几乎完全相同的但启用了source。

以下是： https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-templates.html

Answer 2

解决方案：

在elasticsearch配置文件夹中，打开elasticsearch.yml并将cluster.name设置为其他值，然后重新启动elasticsearch.bat

Answer 3

我曾经不小心通过了源数组中的单个字段，而且它也不存在。仅举例来说"_source": ["bazinga"]并且在汇总结果中source为空。

所以也许你可以简单地将一个完全不相关的字符串传递给_source数组。这可以是更好的解决方案，而不是在elasticsearch.yml文件中进行更改。

ElasticSearch _Source在返回时始终为空

3 个答案: