ElasticSearch function

function_score是ES对查询结果的得分进行二次修改
基本学习可以参考如下文档
Function score
ElasticSearch - function_score 简介

报错内容：
failed to parse [function_score] query. an entry in functions list is missing a function

{
	"query": {
		"function_score": {
			"query": {
				"match_all": {}
			}
		},
		"functions": [
			{
				"filter": {"match": {"test":"text"}},
				"weight": 5 // 这里的weight不能没有
			}
		]
	}
}

function list 里的weight不能没有。不然会报错；