使用 elasticsearch 进行数组搜索时包含的数组

Question

我将用户按以下类别编入索引

{
 id: 1
 name: John
 categories: [
   {
    id: 1
    name: Category 1
   },
   {
    id: 2
    name: Category 2
   }
 ]
},
{
 id: 2
 name: Mark
 categories: [
   {
    id: 1
    name: Category 1
   }
 ]
}

我正在尝试使用

获取类别 1 或类别 2 的所有文档

{
 filter:
   {
     bool: {
       must: [
         {
           terms: {user.categories.id: [1, 2]}
         }
       ]
     }
   }
}

但是它只有returns第一个文件，有两个类，我哪里做错了？据我了解，术语搜索其中一个值包含在该字段中，因此对于用户 1 user.categories.id: [1, 2] 用户 2 user.categories.id: [1] 类别 id 1 包含在两个文档中

Answer 1

处理此问题的最佳方法可能是使用 nested filter。不过，您必须在映射中指定 "nested" 类型。

我可以这样设置索引：

PUT /test_index
{
   "settings": {
      "number_of_shards": 1,
      "number_of_replicas": 0
   },
   "mappings": {
      "doc": {
         "properties": {
            "categories": {
               "type": "nested",
               "properties": {
                  "id": {
                     "type": "long"
                  },
                  "name": {
                     "type": "string"
                  }
               }
            },
            "id": {
               "type": "long"
            },
            "name": {
               "type": "string"
            }
         }
      }
   }
}

然后添加一些文档：

PUT /test_index/doc/1
{
   "id": 1,
   "name": "John",
   "categories": [
      { "id": 1, "name": "Category 1" },
      { "id": 2, "name": "Category 2" }
   ]
}

PUT /test_index/doc/2
{
   "id": 2,
   "name": "Mark",
   "categories": [
      { "id": 1, "name": "Category 1" }
   ]
}

PUT /test_index/doc/3
{
   "id": 3,
   "name": "Bill",
   "categories": [
      { "id": 3, "name": "Category 3" },
      { "id": 4, "name": "Category 4" }
   ]
}

现在我可以像这样使用嵌套的术语过滤器：

POST /test_index/doc/_search
{
   "query": {
      "constant_score": {
         "filter": {
         "nested": {
            "path": "categories",
            "filter": {
                "terms": {
                   "categories.id": [1, 2]
                }
            }
         }
         },
         "boost": 1.2
      }
   }
}
...
{
   "took": 3,
   "timed_out": false,
   "_shards": {
      "total": 1,
      "successful": 1,
      "failed": 0
   },
   "hits": {
      "total": 2,
      "max_score": 1,
      "hits": [
         {
            "_index": "test_index",
            "_type": "doc",
            "_id": "1",
            "_score": 1,
            "_source": {
               "id": 1,
               "name": "John",
               "categories": [
                  {
                     "id": 1,
                     "name": "Category 1"
                  },
                  {
                     "id": 2,
                     "name": "Category 2"
                  }
               ]
            }
         },
         {
            "_index": "test_index",
            "_type": "doc",
            "_id": "2",
            "_score": 1,
            "_source": {
               "id": 2,
               "name": "Mark",
               "categories": [
                  {
                     "id": 1,
                     "name": "Category 1"
                  }
               ]
            }
         }
      ]
   }
}

这是我使用的代码：

http://sense.qbox.io/gist/668aefe910643b52a3a10d40aca67104491668fc

使用 elasticsearch 进行数组搜索时包含的数组

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