弹性搜索 - 检查字符串数组是否有任何以单词“cake”开头的字符串

Question

这些是我的字段：

      {"brand" : "A",
      "productType" : "food",
      "infoList" : [
        "pizza-34","cake-qaw-34"
      ]},
      {
       "brand" : "B",
      "productType" : "food",
      "infoList" : [
        "pasta-3"
      ]}

我只想返回那些在其 infoList 中任何位置以单词“cake”开头的文档。在这种情况下，我应该得到这个

{"brand" : "A",
          "productType" : "food",
          "infoList" : [
            "pizza-34","cake-qaw-34"
          ]}

有人能告诉我如何实现吗？
PS：不能为此使用正则表达式

Answer 1

您可以使用prefix query 来获取那些字符串数组中包含任何以单词“cake”开头的字符串的文档

{
  "query": {
    "prefix": {
      "infoList": "cake"
    }
  }
}

搜索结果将是

"hits": [
      {
        "_index": "67778291",
        "_type": "_doc",
        "_id": "1",
        "_score": 1.0,
        "_source": {
          "brand": "A",
          "productType": "food",
          "infoList": [
            "pizza-34",
            "cake-qaw-34"
          ]
        }
      }
    ]

更新 1：

{
  "query": {
    "bool": {
      "must_not": {
        "prefix": {
          "infoList": "cake"
        }
      }
    }
  }
}

搜索结果将是

"hits": [
      {
        "_index": "67778291",
        "_type": "_doc",
        "_id": "2",
        "_score": 0.0,
        "_source": {
          "brand": "B",
          "productType": "food",
          "infoList": [
            "pasta-3"
          ]
        }
      }
    ]