将 match_all 与过滤器一起使用

Question

我有一个页面，允许用户查询数据集并应用过滤器。他们还可以在不使用字符串查询的情况下应用过滤器。为此，我尝试将 match_all 与过滤器一起使用，但出现以下错误

"{"error":{"root_cause":[{"type":"parsing_exception","re​​ason":"[match_all] 格式错误的查询，预期为 [END_OBJECT] 但找到 [FIELD_NAME]","line":1," col":26}],"type":"parsing_exception","re​​ason":"[match_all] 格式错误的查询，预期为 [END_OBJECT] 但发现 [FIELD_NAME]","line":1,"col":26}, "状态":400}",

这是我正在构建并发送到弹性客户端的搜索参数的示例。

[
  "type" => "events"
  "index" => "events"
  "body" => [
    "query" => [
      "match_all" => {}
      "bool" => [
        "filter" => [
          "range" => [
            "start_date.date" => [
              "gte" => "01/05/2019"
              "lte" => "05/2019"
              "format" => "dd/MM/yyyy||MM/yyyy"
            ]
          ]
        ]
      ]
    ]
    "from" => 0
    "size" => 30
  ]
]

我似乎无法弄清楚如何使用它们。任何指针？谢谢你。

Answer 1

您需要将查询包装在这样的bool查询中：

"query": {
    "bool" : {
        "must" : {
        "match_all": {}
        },
        "filter": {
        "range" : { /* your filter here*/ }
        }
    }
}

只需将bool和 一个must查询包裹在您的周围match_all，它应该可以工作。

我不知道确切的 PHP 语法，但它应该是这样的：

[
  "type" => "events"
  "index" => "events"
  "body" => [
    "query" => [
      "bool" => [
        "must" => [ "match_all" => {}]
        "filter" => [
          "range" => [
            "start_date.date" => [
              "gte" => "01/05/2019"
              "lte" => "05/2019"
              "format" => "dd/MM/yyyy||MM/yyyy"
            ]
          ]
        ]
      ]
    ]
    "from" => 0
    "size" => 30
  ]
]

如需参考，请参阅文档Elasticsearch Reference [7.0] » Query DSL » Compound queries » Bool Query，它包含一个像你这样的例子，match_all并结合了过滤器。