如果对一个string field进行排序，结果往往不准确，因为分词后是多个单词，再排序就不是我们想要的结果了
通常解决方案是，将一个string field建立两次索引，一个分词，用来进行搜索；一个不分词，用来进行排序
PUT /website
{
"mappings": {
"article": {
"properties": {
"title": {
"type": "text",
"fields": {
"raw": {
"type": "string",
"index": "not_analyzed"
}
},
"fielddata": true
},
"content": {
"type": "text"
},
"post_date": {
"type": "date"
},
"author_id": {
"type": "long"
}
}
}
}
}
PUT /website/article/1
{
"title": "first article",
"content": "this is my second article",
"post_date": "2017-01-01",
"author_id": 110
}
{
"took": 2,
"timed_out": false,
"_shards": {
"total": 5,
"successful": 5,
"failed": 0
},
"hits": {
"total": 3,
"max_score": 1,
"hits": [
{
"_index": "website",
"_type": "article",
"_id": "2",
"_score": 1,
"_source": {
"title": "first article",
"content": "this is my first article",
"post_date": "2017-02-01",
"author_id": 110
}
},
{
"_index": "website",
"_type": "article",
"_id": "1",
"_score": 1,
"_source": {
"title": "second article",
"content": "this is my second article",
"post_date": "2017-01-01",
"author_id": 110
}
},
{
"_index": "website",
"_type": "article",
"_id": "3",
"_score": 1,
"_source": {
"title": "third article",
"content": "this is my third article",
"post_date": "2017-03-01",
"author_id": 110
}
}
]
}
}
GET /website/article/_search
{
"query": {
"match_all": {}
},
"sort": [
{
"title.raw": {
"order": "desc"
}
}
]
}