在 Groovy或 JOLT中修改 JSON

编程问答 2022-05-30

问题描述

我有一个简单的 JSON 格式：

{
  "account_login" : "google@gmail.com","view_id" : 1868715,"join_id" : "utm_campaign=toyota&utm_content=multiformat_sites&utm_medium=cpc&utm_source=facebook","start_date" : "2020-02-03","end_date" : "2020-08-30"
}

使用以下 Groovy 脚本 (from this answer)：

def content = """
{
  "account_login" : "google@gmail.com","end_date" : "2020-08-30"
}
"""

def slurped = new JsonSlurper().parseText(content)
 
def builder = new JsonBuilder(slurped)

builder.content.join_id = builder.content.join_id.split("\\s*&\\s*")  //# to array
        .collectEntries{ 
                //# convert each item to map entry
                String[] utmMarks = it.trim().split("\\s*=\\s*")
                utmMarks[0] = [
                    "utm_medium"   : "ga:medium","utm_campaign" : "ga:campaign","utm_source"   : "ga:source","utm_content"  : "ga:adContent","utm_term"     : "ga:keyword",].get( utmMarks[0] )
                utmMarks
            }
        .findAll{ 
             k,v-> k && v!=null  //# filter out empty/null keys
        } 
//builder.content.filters = ...
println(builder.toPrettyString())

我会得到：

{
    "account_login": "google@gmail.com","view_id": 1868715,"join_id": {
        "ga:campaign": "toyota","ga:adContent": "multiformat_sites","ga:medium": "cpc","ga:source": "facebook"
    },"start_date": "2020-02-03","end_date": "2020-08-30"
}

我想更新此脚本（或编写新脚本）并添加新属性：array filters 到上面修改的 json。预期输出：

{
   "account_login":"google@gmail.com","view_id":1868715,"join_id":{
      "ga:campaign":"toyota","ga:adContent":"multiformat_sites","ga:medium":"cpc","ga:source":"facebook"
   },"start_date":"2020-02-03","end_date":"2020-08-30","converted_utm_marks":"ga:campaign=toyota&ga:adContent=multiformat_sites&ga:medium=cpc&ga:source=facebook","filters":[
      {
         "dimensionName":"ga:medium","operator":"EXACT","expressions":[
            "cpc"
         ]
      },{
         "dimensionName":"ga:adContent","expressions":[
            "multiformat_sites"
         ]
      },{
         "dimensionName":"ga:campaign","expressions":[
            "toyota"
         ]
      },{
         "dimensionName":"ga:source","expressions":[
            "facebook"
         ]
      }
   ]
}

但问题是每个 JSON 的过滤器集会不同。这个集合直接依赖于 join_id 集合。如果 JSON join_id 将包含：

"join_id": {
        "ga:campaign": "toyota","ga:keyword": "car"
    }

filters 数组应该是：

[
      {
         "dimensionName":"ga:campaign",{
         "dimensionName":"ga:keyword","expressions":[
            "car"
         ]
      }
]

operator 始终等于 EXACT。属性 dimensionName - 是一个 join_id.propety 名称。 Expressions 是一个 join_id.property 值。因此，基于 filters 的属性 join_id，我需要遍历 join_id 属性并构建具有描述结构的 filters 数组。如何达到预期输出？ JOLT 配置也很受欢迎。

我什至不能简单地遍历 join_id 地图：

slurped.join_id.each { println "Key: $it.key = Value: $it.value" }

我收到错误：

/home/jdoodle.groovy: 24: illegal colon after argument expression;
   solution: a complex label expression before a colon must be parenthesized @ line 24,column 28.
             .collect { [it.ga:campaign] }

更新

我发现了如何构建这个数组：

def array = 
[ 
    filters: slurped.join_id.collect {key,value ->
            [
                dimensionName: key,operator: "EXACT",expressions: [
                    value
                    ]
            ]
        } 
]

好像我明白了：

def slurped = new JsonSlurper().parseText(content)
def builder = new JsonBuilder(slurped)

builder.content.filters = builder.content.join_id.collect {key,expressions: [
                    value
                    ]
            ]
        }

有没有更好的解决方案？

解决方法

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