突出multi_match不上一学期

Question

当我搜索多个关键字时，最后一个关键词不会在结果中突出显示。

这是索引和映射:

PUT objects
{
"mappings": {
"properties": {
"title": {
"type": "search_as_you_type"
}
}
}
}

这是我的搜索:

// query
GET objects/_search
{
"query": {
"multi_match": {
"query": "Goldenen Vlies",
"type": "bool_prefix",
"fields": [
"title",
"title._2gram",
"title._3gram",
"title._index_prefix"
]
}
},
"highlight": {
"fields": {
"title": {}
}
},
"_source": false
}

我得到的输出如下:

{
"took" : 1,
"timed_out" : false,
"_shards" : {...},
"hits" : {
"total" : {
"value" : 23,
"relation" : "eq"
},
"max_score" : 7.628418,
"hits" : [
{
"_index" : "objects",
"_id" : "AWj1tIEBIysZ6sOt9vqw",
"_score" : 7.628418,
"highlight" : {
"title" : [
"Schwurkreuz des Ordens vom <em>Goldenen</em> Vlies" <-------
]
}
}
]
}
}

然而，这将是期望/期望的输出:

{
"took" : 1,
"timed_out" : false,
"_shards" : {...},
"hits" : {
"total" : {
"value" : 23,
"relation" : "eq"
},
"max_score" : 7.628418,
"hits" : [
{
"_index" : "objects",
"_id" : "AWj1tIEBIysZ6sOt9vqw",
"_score" : 7.628418,
"highlight" : {
"title" : [
"Schwurkreuz des Ordens vom <em>Goldenen</em> <em<Vlies</em>" <-------
]
}
}
]
}
}

当我在查询中添加额外的空白空间时，它确实如预期的那样工作:"query": "Goldenen Vlies ",，但我想知道是否有更好的解决方案?

Answer 1

试试输入"best_fields":

{
"query": {
"multi_match": {
"query": "Goldenen Vlies",
"type": "best_fields",
"fields": [
"title",
"title._2gram",
"title._3gram",
"title._index_prefix"
]
}
},
"highlight": {
"fields": {
"title": {}
}
},
"_source": false
}