如何将一个文档中的多个嵌套对象与elasticsearch中的内部命中进行匹配

Question

如何编写包含两个搜索词的查询，这些搜索词与突出显示内部匹配的嵌套对象相匹配。

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以下是示例用例：

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我有一个映射：

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"mappings": {\n      "properties": {\n        "grocery_name": {\n          "type": "text"\n        },\n        "items": {\n          "type": "nested",\n          "properties": {\n            "name": {\n              "type": "text"\n            },\n            "stock": {\n              "type": "integer"\n            },\n            "category": {\n              "type": "text"\n            }\n          }\n        }\n      }\n    }\n

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数据如下所示

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{\n  "grocery_name": "Elastic Eats",\n  "items": [\n    {\n      "name": "Red banana",\n      "stock": "12",\n      "category": "fruit"\n    },\n    {\n      "name": "Cavendish banana",\n      "stock": "10",\n      "category": "fruit"\n    },\n    {\n      "name": "peach",\n      "stock": "10",\n      "category": "fruit"\n    },\n    {\n      "name": "carrot",\n      "stock": "9",\n      "category": "vegetable"\n    },\n    {\n      "name": "broccoli",\n      "stock": "5",\n      "category": "vegetable"\n    }\n  ]\n}\n

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在这里，如果我想要一个在嵌套文档中都有桃子和胡萝卜的文档\ni可以使用多个嵌套查询进行搜索，如下所示

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{\n  "query": {\n    "bool": {\n      "must": [\n        {\n          "nested": {\n            "path": "items",\n            "query": {\n              "match_phrase": {\n                "items.name": {\n                  "query": "carrot"\n                }\n              }\n            }\n          }\n        },\n        {\n          "nested": {\n            "path": "items",\n            "query": {\n              "match_phrase": {\n                "items.name": {\n                  "query": "peach"\n                }\n              }\n            }\n          }\n        }\n      ]\n    }\n  }\n}\n

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上面的查询工作完美，但是如果我添加内部命中，我无法为两个嵌套查询添加，如果我这样做，我会收到以下错误

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\xe2\x80\xa8\xe2\x80\xa8[inner_hits] 已包含 key[items] 的条目

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我想要突出显示每个匹配的嵌套对象，因为elasticsearch 不支持_source突出显示 有什么方法可以突出显示每个嵌套对象？

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Answer 1

您当然可以有多个inner_hits，但需要适当命名它们：

{
  "query": {
    "bool": {
      "must": [
        {
          "nested": {
            "inner_hits": {
              "name": "carrot"     <--
            }, 
            "path": "items",
            "query": {
              "match_phrase": {
                "items.name": {
                  "query": "carrot"
                }
              }
            }
          }
        },
        {
          "nested": {
            "inner_hits": {     
              "name": "peach"      <--
            },
            "path": "items",
            "query": {
              "match_phrase": {
                "items.name": {
                  "query": "peach"
                }
              }
            }
          }
        }
      ]
    }
  }
}

如果未提供名称，您将收到错误 b/c，系统将默认使用items两个子查询中的嵌套路径。