Elasticsearch：无法将参数[分析器]从[默认值]更新为[自动完成]

Question

所以伙计们，我开始研究elasticsearch，并开始尝试在我的机器上构建一个带有edge-ngram标记器的自动完成，并在尝试遵循此类配置的留档时发现了一个问题。

我遵循了以下步骤：

>

根据文档要求，我使用标准配置创建了索引：

 {
    "settings": {
       "analysis": {
          "analyzer": {
             "autocomplete": {
                "tokenizer": "autocomplete",
                  "filter": [
                    "lowercase"
                  ]
              },
              "autocomplete_search": {
                 "tokenizer": "lowercase"
              }
           },
           "tokenizer": {
              "autocomplete": {
                 "type": "edge_ngram",
                 "min_gram": 2,
                 "max_gram": 10,
                 "token_chars": [
                    "letter"
                 ]
              }
           }
        }
     }
 }

我通过批量向索引中添加了一项：

 {"index":{"_index":"products","_type":"products"}}{"sku":"73792589","name":"Bruno's test","img":"73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg","avaliacao":0,"preco_de":159,"preco_por":143.1}

我试图更新字段映射以引用我的自定义分析仪

问题：当尝试继续执行步骤3时，以下错误返回给我：

[REQUEST] _mapping
{
  "properties": {
    "name": {
      "type": "text",
      "analyzer": "autocomplete",
      "search_analyzer": "autocomplete_search",
      "fields": {
        "keyword": {
            "type": "keyword",
            "ignore_above": 256
        }  
      }
    },
    "sku": {
      "type": "text",
      "analyzer": "autocomplete",
      "search_analyzer": "autocomplete_search",
      "fields": {
        "keyword": {
            "type": "keyword",
            "ignore_above": 256
        }  
      }
    }
  }
}

[RESPONSE]
{
  "error": {
    "root_cause": [
        {
            "type": "illegal_argument_exception",
            "reason": "Mapper for [name] conflicts with existing mapper:\n\tCannot update parameter [analyzer] from [default] to [autocomplete]"
        }
    ],
    "type": "illegal_argument_exception",
    "reason": "Mapper for [name] conflicts with existing mapper:\n\tCannot update parameter [analyzer] from [default] to [autocomplete]"
  },
  "status": 400
}

Answer 1

为产品索引添加设置后，您对数据进行了索引，但没有定义任何显式映射。因此，生成了动态映射。

索引的映射是

{
  "products": {
    "mappings": {
      "properties": {
        "avaliacao": {
          "type": "long"
        },
        "img": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "name": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "preco_de": {
          "type": "long"
        },
        "preco_por": {
          "type": "float"
        },
        "sku": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        }
      }
    }
  }
}

现在，您正在尝试更新索引的映射（在第3步中）。您希望将analyzer参数与字段一起添加，但这无法完成。这是因为在更新索引映射时，您可以-

1. 向现有对象字段添加新属性
2. 将多字段添加到现有字段
3. 更改现有字段的映射
4. 重命名一个字段

要了解有关更新映射API的更多信息，请参阅此留档

（您需要首先删除产品索引）按照以下步骤索引批量数据（使用适当的索引映射）

1.第一步：索引映射

{
  "settings": {
    "analysis": {
      "analyzer": {
        "autocomplete": {
          "tokenizer": "autocomplete",
          "filter": [
            "lowercase"
          ]
        },
        "autocomplete_search": {
          "tokenizer": "lowercase"
        }
      },
      "tokenizer": {
        "autocomplete": {
          "type": "edge_ngram",
          "min_gram": 2,
          "max_gram": 10,
          "token_chars": [
            "letter"
          ]
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "name": {
        "type": "text",
        "analyzer": "autocomplete",
        "search_analyzer": "autocomplete_search",
        "fields": {
          "keyword": {
            "type": "keyword",
            "ignore_above": 256
          }
        }
      },
      "sku": {
        "type": "text",
        "analyzer": "autocomplete",
        "search_analyzer": "autocomplete_search",
        "fields": {
          "keyword": {
            "type": "keyword",
            "ignore_above": 256
          }
        }
      }
    }
  }
}

第二步：索引批量数据

POST/ _bulk

{"index":{"_index":"products","_type":"products"}}
{"sku":"73792589","name":"Bruno's test","img":"73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg,73792589_5911_20201229172349.jpg","avaliacao":0,"preco_de":159,"preco_por":143.1}