Elasticsearch context suggester，bool on contexts

Question

我正在使用上下文建议器，我想知道我们是否可以设置用于建议的上下文范围，而不是使用所有上下文。

目前查询需要匹配所有上下文。我们能否在上下文中添加“或”运算和/或指定用于特定查询的上下文？

以here为例:映射:

PUT /venues/poi/_mapping
{
  "poi" : {
    "properties" : {
      "suggest_field": {
        "type": "completion",
        "context": {
          "type": { 
            "type": "category"
          },        
          "location": { 
            "type": "geo",
            "precision" : "500m"
          }
        }
      }
    }
  }
}

然后我索引一个文档:

 {
  "suggest_field": {
    "input": ["The Shed", "shed"],
    "output" : "The Shed - fresh sea food",
    "context": {
      "location": {
        "lat": 51.9481442,
        "lon": -5.1817516
      },      
      "type" : "restaurant"
    }
  }
}

查询:

{
  "suggest" : {
    "text" : "s",
    "completion" : {
      "field" : "suggest_field",
      "context": {
        "location": {
          "value": {
            "lat": 51.938119,
            "lon": -5.174051
          }
        }
      }
    }
  }
}

如果我只使用一个上下文(上例中的“位置”)进行查询，则会出错，我需要传递两个上下文，是否可以指定使用哪个上下文？或者将类似“Context_Operation”的参数设置为“OR”。

Answer 1

你有两个选择:

首先，您将所有可用类型值添加为映射中的默认值(不可扩展)

{
  "poi" : {
    "properties" : {
      "suggest_field": {
        "type": "completion",
        "context": {
          "type": { 
            "type": "category",
            "default": ["restaurant", "pool", "..."]
          },        
          "location": { 
            "type": "geo",
            "precision" : "500m"
          }
        }
      }
    }
  }
}

第二个选项，你为每个索引文档添加一个默认值，并且你只添加这个值作为默认值

映射:

{
  "poi" : {
    "properties" : {
      "suggest_field": {
        "type": "completion",
        "context": {
          "type": { 
            "type": "category",
            "default": "any"
          },        
          "location": { 
            "type": "geo",
            "precision" : "500m"
          }
        }
      }
    }
  }
}

文档:

{
  "suggest_field": {
    "input": ["The Shed", "shed"],
    "output" : "The Shed - fresh sea food",
    "context": {
      "location": {
        "lat": 51.9481442,
        "lon": -5.1817516
      },      
      "type" : ["any", "restaurant"]
    }
  }
}