匹配类型的 DSL 查询如何不起作用？

Question

数据集如下

PUT /dataall/test/1
{
    "name": "Computer Science 101",
    "room": "C12",
    "professor": {
        "name": "Gregg Payne",
        "department": "engineering",
        "facutly_type": "full-time",
        "email": "payneg@onuni.com"
        },
    "students_enrolled": 33,
    "course_publish_date": "2013-08-27",
    "course_description": "CS 101 is a first year computer science introduction teaching fundamental data structures and alogirthms using python. "
}

PUT /dataall/test/2
{
    "name": "Theatre 410",
    "room": "T18",
    "professor": {
        "name": "Greg",
        "department": "art",
        "facutly_type": "part-time",
        "email": ""
        },
    "students_enrolled": 47,
    "course_publish_date": "2013-01-27",
    "course_description": "Tht 410 is an advanced elective course disecting the various plays written by shakespere during the 16th century"
}

DSL查询如下

GET dataall/_search
{
  "query": {
    "match": {
          "professor.name":"Greg"
}
  }
}

映射如下。教授在嵌套的json中

{
  "dataall" : {
    "mappings" : {
      "properties" : {
        "course_description" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "course_publish_date" : {
          "type" : "date"
        },
        "dataproduct" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "id" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "name" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "professor" : {
          "properties" : {
            "department" : {
              "type" : "text",
              "fields" : {
                "keyword" : {
                  "type" : "keyword",
                  "ignore_above" : 256
                }
              }
            },
            "email" : {
              "type" : "text",
              "fields" : {
                "keyword" : {
                  "type" : "keyword",
                  "ignore_above" : 256
                }
              }
            },
            "facutly_type" : {
              "type" : "text",
              "fields" : {
                "keyword" : {
                  "type" : "keyword",
                  "ignore_above" : 256
                }
              }
            },
            "name" : {
              "type" : "text",
              "fields" : {
                "keyword" : {
                  "type" : "keyword",
                  "ignore_above" : 256
                }
              }
            }
          }
        },
        "room" : {
          "type" : "text",
          "fields" : {
            "keyword" : {
              "type" : "keyword",
              "ignore_above" : 256
            }
          }
        },
        "students_enrolled" : {
          "type" : "long"
        }
      }
    }
  }
}

预计是 2（因为“Greg”与 Gregg Payne 相似）但我得到的只是第二个文档，它是完全匹配的？

为什么我的查询不起作用？甚至必须匹配_phrase_prefix。

我的其他索引工作正常，是不是因为映射嵌套的json？

Answer 1

由于您没有提供数据映射，您的 professor 字段可能是嵌套数据类型或对象数据类型有两种可能性

考虑到您已经为professor 字段创建了嵌套数据类型。 要了解有关匹配短语前缀查询的更多信息，请参阅此ES documentation

映射：

{
  "mappings": {
    "properties": {
      "name": {
        "type": "text"
      },
      "room": {
        "type": "text"
      },
      "professor": {
        "type": "nested",
        "properties": {
          "name": {
            "type": "text"
          }
        }
      }
    }
  }
}

搜索查询：

{  
  "query":{  
    "nested":{  
      "path":"professor",
      "query":{  
        "match_phrase_prefix":{  
          "professor.name":"Greg"
        }
      }
    }
  }
}

现在，考虑到文档包含 内部对象 professor。要了解有关 Object 数据类型的更多信息，请参阅this

映射：

 {
  "mappings": {
    "properties": { 
      "name": {
        "type": "text"
      },
      "professor": { 
        "properties": {
          "name":  { "type": "text" }
          }
        }
      }
    }
  }

搜索查询：

    {
  "query": {
    "match_phrase_prefix": {
      "professor.name": "Greg"
    }
  }
}

以上搜索返回的文档在professor 的name 字段中包含以Greg 开头的短语。要了解更多关于匹配词组前缀查询的信息，您可以参考this