弹性搜索 More like this query with filter is adding results

Question

我有以下类型定义 "taggeable":

{
"mappings": {
    "taggeable" : {
        "_all" : {"enabled" : false},
        "properties" : {
            "category" : {
                "type" : "string"
            },
            "tags" : {
                "type" : "string",
                "term_vector" : "yes"
            }
        }
    }
}

}

我还有这5个文件：

Document1 (tags: "t1 t2", category: "cat1")
Document2 (tags: "t1"   , category: "cat1")
Document3 (tags: "t1 t3", category: "cat1")
Document4 (tags: "t4"   , category: "cat1")
Document5 (tags: "t4"   , category: "cat2")

以下查询：

{
"query": {
    "more_like_this" : {
        "fields" : ["tags"],
        "like" : ["t1", "t2"],
        "min_term_freq" : 1,
        "min_doc_freq": 1
        }
    }
}

返回：

Document1 (tags: "t1 t2", category: "cat1")
Document2 ("t1", category: "cat1")
Document3 ("t1 t3", category: "cat1")

这是正确的，但是这个查询：

{
"query": {
     "filtered": {
     "query": {
         "more_like_this" : {
         "fields" : ["tags"],
         "like" : ["t1", "t2"],
         "min_term_freq" : 1,
         "min_doc_freq": 1
     },
    "filter": {
         "bool": {
                "must": [                            
                    {"match": { "category": "cat1"}}
                ]
         }
    }
 }

} }

返回：

Document1 (tags: "t1 t2", category: "cat1")
Document4 (tags: "t4"   , category: "cat1")
Document2 (tags: "t1"   , category: "cat1")
Document3 (tags: "t1 t3", category: "cat1")

也就是说，Document4现在也被检索出来了，它的分数和Documen1差不多，完美匹配，即使Document4没有包含任何词在"t1 t2"。

有人知道发生了什么事吗？我正在使用 Elastic Search 2.4.6

提前致谢

Answer 1

这是一个很好的例子，说明为什么一致的缩进很重要。在这里，我用一致的缩进修改了你发布的内容，问题更加明显（JSONLint 是一个方便的工具，如果你没有使用对此有帮助的编辑器）：

{
  "query": {
    "filtered": {
      "query": {
        "more_like_this": {
          "fields": ["tags"],
          "like": ["t1", "t2"],
          "min_term_freq": 1,
          "min_doc_freq": 1
        },
        "filter": {
          "bool": {
            "must": [{
              "match": {
                "category": "cat1"
              }
            }]
          }
        }
      }
    }
  }

您的过滤器是 "query" 的子项，而不是 "filtered" 的子项。

尽管如此，您不应该使用过滤，它已被弃用，see here。您应该将其更改为布尔值，如此处指定的那样。

弹性搜索 More like this query with filter is adding results

Elastic search More like this query with filter is adding results

lucene

elasticsearch

elasticsearch-2.0