Powershell ServiceNow em_事件表附加_信息字段正在返回[object object]

我们通过PowerShell（调用RestMethod）使用RESTAPI，以便使用web服务API通过单个调用在ServiceNow事件[em_event]表中插入记录

我们成功地将事件插入em_事件表， 但唯一的问题是附加信息字段

出于某种原因

我的PowerShell脚本的JSON结构， 正在导致附加信息的输出作为对象而不是JSON字符串返回

因此,， 附加信息中的值未正确显示，而是显示为[object]：

这是我的PowerShell脚本中的JSON结构：

# Specify request body
$body = @"
{   "records":  
[
     {
     "source":"MyClass",
     "event_class":"$AtargetResourceType",
     "resource":"$AtargetResourceType",
     "node":"$AtargetResourceName",
     "metric_name":"$Aname",
     "type":"$AsignalType",
     "severity":"$Aseverity",
     "message_key":"$Aid",
     "u_mc_object":"$AtargetResource",
     "description":"$Adescription",
     "additional_info":"{  
                            'u_mc_object_class':'$AsourceCreatedId',
                            'u_mc_parameter':'$AmetricName',
                            'u_mc_parameter_value':'$AmetricValue'
                        }"
      }     
   ]
}
"@

---

您发布的图像未打开。但根据您的问题，以下行将返回字符串值以获取其他信息：

($body|ConvertFrom-Json).records.additional_info

---

我使用邮递员发送请求时遇到了同样的问题，我发送请求时是这样的：

{   "records":  
[
     {
     "source":"BMC TrueSight",
     "type":"Incident from trusight",
     "severity":"1",
     "description":"This is a test from WEB SERVICE API ERROR",
     "additional_info":{  
                        "status":"new",
                        "description":"This is a descriotion from additional information",
                        "category":"41",
                        "subcategory": "test",
                        "company": "test",
                        "business_service":"test"
                        }
      }     
   ]
}

"additional_info": "{\"assignee_group\":\"ETSS\/UNIX99\",\"status\":\"new\",\"description\":\"This is a descriotion from additional information\",\"category\":\"41\",\"subcategory\":\"test\",\"company\":\"test\",\"business_service\":\"
} 

它在附加信息字段中显示[object][object]，我所做的是将该字段作为如下字符串发送：

{   "records":  
[
     {
     "source":"BMC TrueSight",
     "type":"Incident from trusight",
     "severity":"1",
     "description":"This is a test from WEB SERVICE API ERROR",
     "additional_info":{  
                        "status":"new",
                        "description":"This is a descriotion from additional information",
                        "category":"41",
                        "subcategory": "test",
                        "company": "test",
                        "business_service":"test"
                        }
      }     
   ]
}

"additional_info": "{\"assignee_group\":\"ETSS\/UNIX99\",\"status\":\"new\",\"description\":\"This is a descriotion from additional information\",\"category\":\"41\",\"subcategory\":\"test\",\"company\":\"test\",\"business_service\":\"
} 

---

您只需要将JSON转换为字符串。

您能详细说明您的答案吗？在JSON结构中，我需要在哪里使用这一行？我需要使用converttojson吗？（cmdlet将任何对象转换为JavaScript对象表示法（JSON）格式的字符串）