Elasticsearch script score问题

想根据文档中的多个字段进行排序，使用script score报错,No such property: w1 for class: 0d34f35ce7dcd19d5942f7f52352cfbb6627c6d0"
 
1、 文档结构，其中w1-w5都在[0-10]的范围内
curl -XPUT 'http://localhost:9200/stars/star/1' -d '{
    "user" : "test",
    "title" : "明星1",
    "w1" : 10,
    "w2" : 1,
    "w3": 5,
    "w4": 3,
    "w5": 8
}'
 
2,检索请求，分别设置w1-w5的权重，然后综合排序，请求如下
curl -XGET 'http://localhost:9202/stars/star/_search' -d '{
  "query": {
    "function_score": {
      "query": {
        "match": {
          "title": "明星"
        }
      },
      "script_score": {
        "script":"doc['w1'].value * w1_factor + doc['w2'].value * w2_factor + doc['w3'].value * w3_factor + doc['w4'].value * w4_factor + doc['w5'].value * w5_factor",
         "params" : {
             "w1_factor" : 90,
             "w2_factor" : 90,
             "w3_factor" : 90,
             "w4_factor" : 80,
             "w5_ctr" : 0.10
             }
      }
    }
  }
}'
 
 
3.返回错误结果，No such property: w1 for class: 0d34f35ce7dcd19d5942f7f52352cfbb6627c6d0"
{
"took":19,
"timed_out":false,
"_shards":{
"total":5,
"successful":4,
"failed":1,
"failures":[
{
"shard":3,
"index":"stars",
"node":"9eUXBp57SqaDWwUS_pCK2A",
"reason":{
"type":"script_exception",
"reason":"failed to run inline script [doc[w1].value * w1_factor + doc[w2_factor].value * w2_factor + doc[w3].value * w3_factor + doc[w4_factor].value * w4_factor + doc[w5].value * w5_factor] using lang [groovy]",
"caused_by":{
"type":"missing_property_exception",
"reason":"No such property: w1 for class: 0d34f35ce7dcd19d5942f7f52352cfbb6627c6d0"
}
}
}
]
},
"hits":{
"total":0,
"max_score":null,
"hits":{
}
}
}