search template - 解耦程序&搜索dsl
- elasticsearch的查询语句
- 对相关性算分 / 查询性能都至关重要
- 在发开发初期，虽然可以明确查询参数，但是往往还不能最终定义查询的dsl的具体结构
- 通过search tamplate定义一个contract
- 各司其职，解耦
-
开发人员/搜索工程师/性能工程师
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-
index alias实现零停机运维
-
实现索引的冲减，前端可以不间断对索引进行查询
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POST _scripts/tmdb
{
"script": {
"lang": "mustache",
"source": {
"_source": [
"title","overview"
],
"size": 20,
"query": {
"multi_match": {
"query": "{{q}}",
"fields": ["title","overview"]
}
}
}
}
}
DELETE _scripts/tmdb
GET _scripts/tmdb
POST tmdb/_search/template
{
"id":"tmdb",
"params": {
"q": "basketball with cartoon aliens"
}
}
PUT movies-2019/_doc/1
{
"name":"the matrix",
"rating":5
}
PUT movies-2019/_doc/2
{
"name":"Speed",
"rating":3
}
POST _aliases
{
"actions": [
{
"add": {
"index": "movies-2019",
"alias": "movies-latest"
}
}
]
}
POST movies-latest/_search
{
"query": {
"match_all": {}
}
}
POST _aliases
{
"actions": [
{
"add": {
"index": "movies-2019",
"alias": "movies-lastest-highrate",
"filter": {
"range": {
"rating": {
"gte": 4
}
}
}
}
}
]
}
POST movies-lastest-highrate/_search
{
"query": {
"match_all": {}
}
}
