term suggester 功能介绍
term suggester
根据提供的文档提供搜索关键词的建议,也就是关键词自动纠错。该链接介绍如何使用 term suggester
语法。term suggester
是支持中文的,必须非常小心参数 min_word_length
,默认值为 4
,是指推荐词的长度大于 4
才会被显示,设置小一些能够开到效果(本人就被这个参数坑了,误以为 term suggester
不支持中文,绕了一大圈)。
本人使用的查询语法
{
"from": 0,
"size": 0,
"suggest": {
"didyoumean": {
"text": "长安城北京城",
"term": {
"field": "search_text_new",
"analyzer": "ik_smart",
"size": 5,
"suggest_mode": "always",
"min_word_length": 2
}
}
}
}
结果:
{
"took": 32,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 2267687,
"max_score": 0,
"hits": []
},
"suggest": {
"didyoumean": [
{
"text": "长安城",
"offset": 0,
"length": 3,
"options": [
{
"text": "长安街",
"score": 0.6666666,
"freq": 2
},
{
"text": "长安",
"score": 0.5,
"freq": 256
}
]
},
{
"text": "北京城",
"offset": 3,
"length": 3,
"options": [
{
"text": "北京人",
"score": 0.6666666,
"freq": 89
},
{
"text": "北京大",
"score": 0.6666666,
"freq": 68
}
]
}
]
}
}
term suggester 参数
term suggester
用到的一些参数及说明。
phrase suggester
phrase Suggester
也是提供关键词自动纠错功能,是 term suggester
的升级版。
completion suggester
Completion Suggester
前缀匹配,不具有像 term
以及 phrase
关键词的自动纠错功能,是一种自动补全功能。
completion suggester 中文使用示例
欢迎转载,请注明本文链接,谢谢你。
2017.4.5 20:00