使用 Phrase Suggester 时遇到 ElasticsearchIllegalArgumentException

Question

我正在尝试使用 ElasticSearch 1.7.3 为我公司的搜索引擎实现一个 Did-you-mean 功能。我按照文档设置了一个短语建议器并创建了一个自定义映射来支持它。

但是，当我执行_suggest 查询时，我得到ElasticsearchIllegalArgumentException[Suggester[simple_phrase] not supported]。我做错了什么？

这是我的查询：

POST knowledge_graph/entities/_suggest
{
  "suggest": {
    "text" : "apple in",
    "simple_phrase": {
      "phrase" : {
        "field" : "canonical_name"
      }
    }
  }
}

我收到以下回复：

{
  "_shards": {
    "total": 5,
    "successful": 0,
    "failed": 5,
    "failures": [
      {
        "index": "knowledge_graph",
        "shard": 0,
        "status": 500,
        "reason": "BroadcastShardOperationFailedException[[knowledge_graph][0] ]; nested: ElasticsearchException[failed to execute suggest]; nested: ElasticsearchIllegalArgumentException[Suggester[simple_phrase] not supported]; "
      },
      ...
    ]
  }
} 

这是我的索引的设置和映射：

{
  "knowledge_graph": {
    "aliases": {},
    "mappings": {
      "entities": {
        "properties": {
          "autocomplete": {
            "type": "completion",
            "analyzer": "simple",
            "payloads": true,
            "preserve_separators": true,
            "preserve_position_increments": true,
            "max_input_length": 50
          },
          "canonical_name": {
            "type": "string",
            "analyzer": "simple",
            "fields": {
              "shingles": {
                "type": "string",
                "analyzer": "simple_shingle_analyzer"
              }
            }
          },
          "entity_query": {
            "properties": {
              "simple_phrase": {
                "properties": {
                  "phrase": {
                    "properties": {
                      "field": {
                        "type": "string"
                      }
                    }
                  }
                }
              },
              "text": {
                "type": "string"
              }
            }
          },
          "suggest": {
            "properties": {
              "simple_phrase": {
                "properties": {
                  "phrase": {
                    "properties": {
                      "field": {
                        "type": "string"
                      }
                    }
                  }
                }
              },
              "text": {
                "type": "string"
              }
            }
          }
        }
      }
    },
    "settings": {
      "index": {
        "creation_date": "1449251691345",
        "analysis": {
          "filter": {
            "shingles_1_6": {
              "type": "shingle",
              "max_shingle_size": "6",
              "output_unigrams_if_no_shingles": "true"
            }
          },
          "analyzer": {
            "simple_shingle_analyzer": {
              "type": "custom",
              "filter": [
                "lowercase",
                "shingles_1_6"
              ],
              "tokenizer": "standard"
            }
          }
        },
        "number_of_shards": "5",
        "number_of_replicas": "0",
        "version": {
          "created": "1070399"
        },
        "uuid": "g_Yp7z6kQHCDRtd6TvVlzQ"
      }
    },
    "warmers": {}
  }
}

Answer 1

有两种方法可以执行suggest 请求，一种使用_search 端点，另一种使用_suggest 端点。

来自Docs

建议对 _suggest 端点执行的请求应该省略 周围的建议元素，仅在建议时使用 请求是搜索的一部分。

如果您针对_search api 执行查询，您的查询将起作用

POST knowledge_graph/entities/_search <---- here
{
  "suggest": {
    "text" : "apple in",
    "simple_phrase": {
      "phrase" : {
        "field" : "canonical_name"
      }
    }
  },
   "size" : 0
}

如果你想用_suggest端点查询，试试这个

POST knowledge_graph/_suggest
{
  "suggest": {
    "text": "apple in",
    "phrase": {
      "field": "canonical_name"
    }
  }
}

注意 - 我认为您应该针对 canonical_name.shingles

执行短语建议