在带有 Should 子句的 Elasticsearch 中使用 SearchTemplate 进行日期范围查询

Question

我们有一个场景，我们必须使用 "OR" 条件进行范围查询。它工作正常，有一个查询，但在触发多个查询时出错。

POST _scripts/dateTemplate
{
  "script": {
    "lang": "mustache",
    "source": """
        {
        "query": {
            "bool": {
                "must": {
                "query_string": {
                    "query": "title:({{searchkeyword}})"
                }
            },
            "filter": {
                "bool":{
                    "must":[
                        {
                            "match_all": {}
                        }
                        {{#f_url}} , {
                            "terms" : {
                                "f_url": [{{#toJson}}f_url{{/toJson}} ]
                                }
                            }
                        {{/f_url}}
                    ],
                    "should":[
                        {{#since}}
                            {
                                "range": {
                                    "{{since}}": {
                                        {{#from}}"from": "{{from}}"{{#to}},{{/to}}{{/from}}
                                        {{#to}}"to":"{{to}}"{{/to}}
                                    }
                                }
                            }
                        {{/since}}
                    ]
                }
            }
        }
    }
    }
"""
  }
}

调用模板时查询

POST _search/template
{
  "id": "dateTemplate",
  "params": {
    "searchkeyword": "*",
    "since":[ {
      "since":"@timestamp",
      "from": "2018-06-01"
    },
     {
      "since":"@timestamp",
      "from": "2018-06-08"
    }
    ]
  }
}

错误

{
  "error": {
    "root_cause": [
      {
        "type": "json_parse_exception",
        "reason": "Unexpected character ('{' (code 123)): was expecting comma to separate Array entries\n at [Source: \t\t{\n\t\t\"query\": {\n\t\t\t\"bool\": {\n\t\t\t\t\"must\": {\n\t\t\t\t\"query_string\": {\n\t\t\t\t\t\"query\": \"title:(*)\"\n\t\t\t\t}\n\t\t\t},\n\t\t\t\"filter\": {\n\t\t\t\t\"bool\":{\n\t\t\t\t\t\"must\":[\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\t\"match_all\": {}\n\t\t\t\t\t\t}\n\t\t\t\t\t],\n\t\t\t\t\t\"should\":[\n\t\t\t\t\t\t\t{\n\t\t\t\t\t\t\t\t\"range\": {\n\t\t\t\t\t\t\t\t\t\"@timestamp\": {\n\t\t\t\t\t\t\t\t\t\t\"from\": \"2018-06-01\"\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t{\n\t\t\t\t\t\t\t\t\"range\": {\n\t\t\t\t\t\t\t\t\t\"@timestamp\": {\n\t\t\t\t\t\t\t\t\t\t\"from\": \"2018-06-08\"\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\t\t\t\t\t]\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\t}; line: 25, column: 9]"
      }
    ],
    "type": "json_parse_exception",
    "reason": "Unexpected character ('{' (code 123)): was expecting comma to separate Array entries\n at [Source: \t\t{\n\t\t\"query\": {\n\t\t\t\"bool\": {\n\t\t\t\t\"must\": {\n\t\t\t\t\"query_string\": {\n\t\t\t\t\t\"query\": \"title:(*)\"\n\t\t\t\t}\n\t\t\t},\n\t\t\t\"filter\": {\n\t\t\t\t\"bool\":{\n\t\t\t\t\t\"must\":[\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\t\"match_all\": {}\n\t\t\t\t\t\t}\n\t\t\t\t\t],\n\t\t\t\t\t\"should\":[\n\t\t\t\t\t\t\t{\n\t\t\t\t\t\t\t\t\"range\": {\n\t\t\t\t\t\t\t\t\t\"@timestamp\": {\n\t\t\t\t\t\t\t\t\t\t\"from\": \"2018-06-01\"\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t{\n\t\t\t\t\t\t\t\t\"range\": {\n\t\t\t\t\t\t\t\t\t\"@timestamp\": {\n\t\t\t\t\t\t\t\t\t\t\"from\": \"2018-06-08\"\n\t\t\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t\t}\n\t\t\t\t\t\t\t}\n\t\t\t\t\t]\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\t}; line: 25, column: 9]"
  },
  "status": 500
}

同样，如果我将它添加到 must 子句中，它在 "AND" 条件下工作得很好。你能帮忙用 "AND" 和 "OR" 条件构建模板吗？

Answer 1

大功告成，您只需要在到达数组的最后一个元素时让 mustache 知道。所以你的模板应该是这样的（即我们在每个元素后添加一个逗号，除了最后一个）：

  ...
                "should":[
                    {{#since}}
                        {
                            "range": {
                                "{{since}}": {
                                    {{#from}}"from": "{{from}}"{{#to}},{{/to}}{{/from}}
                                    {{#to}}"to":"{{to}}"{{/to}}
                                }
                            }
                        }{{^last}},{{/last}}                <-- modify this line
                    {{/since}}
                ]
  ...

然后简单地修改您的调用以将 last 标志包含到 since 数组的最后一个元素：

POST _search/template
{
  "id": "dateTemplate",
  "params": {
    "searchkeyword": "*",
    "since":[ {
      "since":"@timestamp",
      "from": "2018-06-01"
    },
     {
      "since":"@timestamp",
      "from": "2018-06-08",
      "last": true                                         <-- add this line
    }
    ]
  }
}

在带有 Should 子句的 Elasticsearch 中使用 SearchTemplate 进行日期范围查询

Date Range Query using SearchTemplate in Elasticsearch with Should clause

date-range

elasticsearch

elasticsearch-template