本文主要是介绍elasticsearch painless 排序脚本中使用 Map (HashMap)，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
参考资料https://www.elastic.co/guide/en/elasticsearch/painless/master/painless-casting.html
https://blog.csdn.net/weixin_38809962/article/details/79768002
https://blog.csdn.net/hechaojie_com/article/details/88881503
有一个业务需求，在给 es 中传入一个 id 集合，然后根据条件去过滤掉一些记录。然后分页返回 10 条记录，但是有个条件，排序要按照传入的 id 的顺序进行排序，传入的时候，哪个 id 在前，返回的时候这个 id 也得在前面。只能根据脚本写排序。
GET xxxxx/_doc/_search?size=1000
{"query": {"bool": {"filter": [{"terms": {"exerciseId": [268704949713821702,268704949713821698,268704949713821705,330379959905607682,330379959905607681,330379959905607680,330379959905607687,330379959905607690,330354511029002255,330354511029002245,330354511029002247,330354511029002240,330354511029002243,330354511029002253,268704949713821707,395591013664874499,329589022711406596,329589022711406597,395591013664874500,268704949713821709,395943043096961027,268704949713821706,268704949713821704,330379959905607693,329589022711406598,329589022711406613,395943043096961025,395943043096961024,395591013664874498,329589022711406612,329589022711406601,268704949713821696,268704949713821700,268704949713821697,329589022711406611,329589022711406594,395591013664874497,329589022711406600,330379959905607683,330379959905607685,330379959905607684,330379959905607691,330379959905607689,330379959905607688,330379959905607692,330354511029002248,330354511029002249,330354511029002250,330354511029002251,330354511029002241,330354511029002242,329589022711406595,395943043096961026,330379959905607686,330354511029002246,395591013664874496,329589022711406602,268704949713821701,268704949713821708,329589022711406610,329589022711406599,330354511029002254,329589022711406609,329589022711406614],"boost": 1.0}}],"adjust_pure_negative": true,"boost": 1.0}},"sort": [{"_script": {"script": {"source": "def exerciseId = doc['exerciseId'].value;def str = String.valueOf(exerciseId);params.exerciseIdToScoreMap.get(str);","lang": "painless","params": {"exerciseIdToScoreMap": {"329589022711406599": 4,"329589022711406598": 40,"329589022711406597": 47,"329589022711406596": 48,"329589022711406595": 13,"329589022711406594": 29,"395591013664874497": 28,"330354511029002250": 17,"395591013664874496": 9,"395591013664874499": 49,"395591013664874498": 36,"330354511029002242": 14,"330354511029002243": 52,"330354511029002240": 53,"330354511029002241": 15,"330354511029002246": 10,"330354511029002247": 54,"330354511029002245": 55,"330354511029002248": 19,"330354511029002249": 18,"268704949713821697": 31,"268704949713821696": 33,"268704949713821698": 63,"330354511029002253": 51,"330354511029002254": 3,"330354511029002251": 16,"330354511029002255": 56,"329589022711406614": 1,"329589022711406613": 39,"329589022711406612": 35,"329589022711406611": 30,"329589022711406610": 5,"268704949713821701": 7,"268704949713821700": 32,"268704949713821702": 64,"268704949713821705": 62,"268704949713821704": 42,"268704949713821707": 50,"268704949713821706": 43,"268704949713821709": 45,"268704949713821708": 6,"330379959905607687": 58,"395943043096961027": 44,"395591013664874500": 46,"330379959905607688": 21,"330379959905607685": 25,"330379959905607686": 11,"330379959905607683": 26,"330379959905607684": 24,"330379959905607681": 60,"330379959905607682": 61,"329589022711406609": 2,"330379959905607680": 59,"395943043096961024": 37,"395943043096961025": 38,"329589022711406602": 8,"329589022711406601": 34,"395943043096961026": 12,"329589022711406600": 27,"330379959905607689": 22,"330379959905607692": 20,"330379959905607693": 41,"330379959905607690": 57,"330379959905607691": 23}}},"type": "number","order": "desc"}}]
}
map 在使用的时候有两种方式:
- 一种是 map.key 这样
- 另一种是 map.get(key) 这种形式。
如果 key 是脚本中定义的变量，则只能 map.get(key) 这种形式，今天尝试了好久终于调好了，特此记录一下，以飨后来人。
这篇关于elasticsearch painless 排序脚本中使用 Map (HashMap)的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
