谁能给我一个提示,我做错了什么。我正在尝试以这种方式设置弹性搜索
{
"settings" : {
"index" : {
"analysis" : {
"analyzer" : {
"synonym" : {
"type" : "custom",
"tokenizer" : "whitespace",
"filter" : ["en_US", "lowercase", "synonym"]
}
},
"filter" : {
"synonym" : {
"type" : "synonym",
"synonyms_path" : "analysis/synonym.txt"
},
"en_US" : {
"type" : "hunspell",
"locale" : "en_US",
"dedup" : true
}
}
}
}
},
"mappings" : {
"jdbc" : {
"properties" : {
"Title" : {
"type" : "string",
"search_analyzer" : "synonym",
"index_analyzer" : "standard"
},
"Abstract" : {
"type" : "string",
"search_analyzer" : "synonym",
"index_analyzer" : "standard"
}
}
}
}
}
我的同义词.txt文件包含
beer, ale, lager, cark ale
Lithuania, Republic of Lithuania, Lithuanian
所以是时候试试我的分析仪了:
http://localhost:9200/jdbc/_analyze?text=beer&analyzer=synonym&pretty=true
它按预期工作并返回我
{
"tokens" : [ {
"token" : "beer",
"start_offset" : 0,
"end_offset" : 4,
"type" : "SYNONYM",
"position" : 1
}, {
"token" : "ale",
"start_offset" : 0,
"end_offset" : 4,
"type" : "SYNONYM",
"position" : 1
}, {
"token" : "lager",
"start_offset" : 0,
"end_offset" : 4,
"type" : "SYNONYM",
"position" : 1
}, {
"token" : "cark",
"start_offset" : 0,
"end_offset" : 4,
"type" : "SYNONYM",
"position" : 1
}, {
"token" : "ale",
"start_offset" : 0,
"end_offset" : 4,
"type" : "SYNONYM",
"position" : 1
} ]
}
但是,查询此内容:
http://localhost:9200/jdbc/_analyze?text=Lithuanian&analyzer=synonym&pretty=true
只会返回:
{
"tokens" : [ {
"token" : "lithuanian",
"start_offset" : 0,
"end_offset" : 10,
"type" : "word",
"position" : 1
} ]
}
有什么提示吗?
在分析期间,令牌筛选器按指定的顺序应用。因此,在上述情况下,"立陶宛"首先转换为小写"立陶宛"。由于同义词文件不包含此大小写版本的令牌,因此不会发生同义词转换。elasticsearch 指南中的这一部分将对此进行更多讨论。
根据用例,有两种方法可以解决此问题,将自定义分析器中令牌筛选器的顺序更改为:
"synonym" : {
"type" : "custom",
"tokenizer" : "whitespace",
"filter" : ["en_US", "synonym","lowercase"]
}
以上内容仍区分大小写,但转换将与上述内容一致同义词.txt
或者,您可以将 analysis/synonym.txt 中的所有同义词设置为小写,并保持与问题中指定的相同分析器设置。例:
beer, ale, lager, cark ale
lithuania, republic of lithuania, lithuanian