【发布时间】：2016-08-09 10:20:34
【问题描述】：
我需要自动完成phrases。例如，当我搜索“老年痴呆症”时，我想得到“老年痴呆症”。
为此，我配置了Edge NGram tokenizer。我尝试将edge_ngram_analyzer 和standard 作为查询正文中的分析器。然而，当我尝试匹配一个短语时，我无法获得结果。
我做错了什么？
我的查询：
{
"query":{
"multi_match":{
"query":"dementia in alz",
"type":"phrase",
"analyzer":"edge_ngram_analyzer",
"fields":["_all"]
}
}
}
我的映射：
...
"type" : {
"_all" : {
"analyzer" : "edge_ngram_analyzer",
"search_analyzer" : "standard"
},
"properties" : {
"field" : {
"type" : "string",
"analyzer" : "edge_ngram_analyzer",
"search_analyzer" : "standard"
},
...
"settings" : {
...
"analysis" : {
"filter" : {
"stem_possessive_filter" : {
"name" : "possessive_english",
"type" : "stemmer"
}
},
"analyzer" : {
"edge_ngram_analyzer" : {
"filter" : [ "lowercase" ],
"tokenizer" : "edge_ngram_tokenizer"
}
},
"tokenizer" : {
"edge_ngram_tokenizer" : {
"token_chars" : [ "letter", "digit", "whitespace" ],
"min_gram" : "2",
"type" : "edgeNGram",
"max_gram" : "25"
}
}
}
...
我的文件：
{
"_score": 1.1152233,
"_type": "Diagnosis",
"_id": "AVZLfHfBE5CzEm8aJ3Xp",
"_source": {
"@timestamp": "2016-08-02T13:40:48.665Z",
"type": "Diagnosis",
"Document_ID": "Diagnosis_1400541",
"Diagnosis": "F00.0 - Dementia in Alzheimer's disease with early onset",
"@version": "1",
},
"_index": "carenotes"
},
{
"_score": 1.1152233,
"_type": "Diagnosis",
"_id": "AVZLfICrE5CzEm8aJ4Dc",
"_source": {
"@timestamp": "2016-08-02T13:40:51.240Z",
"type": "Diagnosis",
"Document_ID": "Diagnosis_1424351",
"Diagnosis": "F00.1 - Dementia in Alzheimer's disease with late onset",
"@version": "1",
},
"_index": "carenotes"
}
“dementia in alzheimer”短语分析：
{
"tokens": [
{
"end_offset": 2,
"token": "de",
"type": "word",
"start_offset": 0,
"position": 0
},
{
"end_offset": 3,
"token": "dem",
"type": "word",
"start_offset": 0,
"position": 1
},
{
"end_offset": 4,
"token": "deme",
"type": "word",
"start_offset": 0,
"position": 2
},
{
"end_offset": 5,
"token": "demen",
"type": "word",
"start_offset": 0,
"position": 3
},
{
"end_offset": 6,
"token": "dement",
"type": "word",
"start_offset": 0,
"position": 4
},
{
"end_offset": 7,
"token": "dementi",
"type": "word",
"start_offset": 0,
"position": 5
},
{
"end_offset": 8,
"token": "dementia",
"type": "word",
"start_offset": 0,
"position": 6
},
{
"end_offset": 9,
"token": "dementia ",
"type": "word",
"start_offset": 0,
"position": 7
},
{
"end_offset": 10,
"token": "dementia i",
"type": "word",
"start_offset": 0,
"position": 8
},
{
"end_offset": 11,
"token": "dementia in",
"type": "word",
"start_offset": 0,
"position": 9
},
{
"end_offset": 12,
"token": "dementia in ",
"type": "word",
"start_offset": 0,
"position": 10
},
{
"end_offset": 13,
"token": "dementia in a",
"type": "word",
"start_offset": 0,
"position": 11
},
{
"end_offset": 14,
"token": "dementia in al",
"type": "word",
"start_offset": 0,
"position": 12
},
{
"end_offset": 15,
"token": "dementia in alz",
"type": "word",
"start_offset": 0,
"position": 13
},
{
"end_offset": 16,
"token": "dementia in alzh",
"type": "word",
"start_offset": 0,
"position": 14
},
{
"end_offset": 17,
"token": "dementia in alzhe",
"type": "word",
"start_offset": 0,
"position": 15
},
{
"end_offset": 18,
"token": "dementia in alzhei",
"type": "word",
"start_offset": 0,
"position": 16
},
{
"end_offset": 19,
"token": "dementia in alzheim",
"type": "word",
"start_offset": 0,
"position": 17
},
{
"end_offset": 20,
"token": "dementia in alzheime",
"type": "word",
"start_offset": 0,
"position": 18
},
{
"end_offset": 21,
"token": "dementia in alzheimer",
"type": "word",
"start_offset": 0,
"position": 19
}
]
}
【问题讨论】：
-
您是否尝试使用 query_string 而不是 multi_match？如果它解决了您的问题，请告诉我。
-
query_string默认在_all字段中搜索。所以，这和我在这里对multi_match和"fields": ["_all"]所做的一样。不过，我试了一下，没有成功。我使用了以下查询{'query': {'query_string': {'query': 'dementia in alzh', 'phrase_slop': 0}}}
标签： elasticsearch elasticsearch-mapping elasticsearch-query