我正在使用Elasticsearch v 7.3.1并尝试实现部分搜索。所有搜索都进行得很好，但是当我查询“ John Oxford ”时，“ John”与文档匹配，但是整个文档中没有“ Oxford ”。但仍显示给我文档而不显示空结果。
我该怎么做，以便在我们查询John Oxford时不返回文档？
我的映射，设置，示例文档和学生数据查询如下。
对应
PUT student
{
"settings": {
"analysis": {
"filter": {
"autocomplete_filter": {
"type": "edge_ngram",
"min_gram": 1,
"max_gram": 20
}
},
"analyzer": {
"autocomplete": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"autocomplete_filter"
]
}
}
}
}, "mappings" : {
"properties" : {
"DOB" : {
"type" : "text"
},
"email" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"first_name" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"home_phone" : {
"type" : "text"
},
"last_name" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"student_id" : {
"type" : "text"
}
}
}
}
样本文件
POST student/_doc
{
"DOB": "1983-12-04",
"email": "[email protected]",
"first_name": "john",
"home_phone": 1242432,
"last_name": "doe",
"student_id": 28
}
询问
GET student/_search
{
"query": {
"multi_match": {
"query": "john oxford",
"type": "bool_prefix",
"analyzer": "standard",
"fields": [
"first_name",
"last_name",
"email",
"DOB",
"home_phone",
"student_id"
]
}
}
}
以下是我想要的结果
要实施部分搜索，您应该autocomplete analyzer在所需的文本字段中添加特定内容，并search_analyzer由于使用edgengram过滤器而实施特定内容-请在此处和此处阅读以获取解释。与您在查询期间指定分析器相比，这样做更舒服。尝试：
PUT student
{
"settings": {
"analysis": {
"filter": {
"autocomplete_filter": {
"type": "edge_ngram",
"min_gram": 1,
"max_gram": 20
}
},
"analyzer": {
"autocomplete": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"autocomplete_filter"
]
}
}
}
}, "mappings" : {
"properties" : {
"DOB" : {
"type" : "text",
"analyzer": "autocomplete",
"search_analyzer": "standard"
},
"email" : {
"type" : "text",
"analyzer": "autocomplete",
"search_analyzer": "standard",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"first_name" : {
"type" : "text",
"analyzer": "autocomplete",
"search_analyzer": "standard",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"home_phone" : {
"type" : "text",
"analyzer": "autocomplete",
"search_analyzer": "standard"
},
"last_name" : {
"type" : "text",
"analyzer": "autocomplete",
"search_analyzer": "standard",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"student_id" : {
"type" : "text"
}
}
}
}
然后，当您查询两个词的自动完成时，应将它们与and运算符连接起来。对于您的用例，跨字段类型应该是最好的：
GET student/_search
{
"query": {
"multi_match" : {
"query": "John Oxford",
"type": "cross_fields",
"fields": [
"first_name",
"last_name",
"email",
"DOB",
"home_phone",
"student_id"
],
"operator": "and"
}
}
}
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