Dynamics crm 无法删除Dynamics 365约会'；s关于使用Web API的对象值

我正在尝试使用Microsoft Dynamics 365 Web API从约会实体中删除字段

关于对象ID的值。无法执行，但显示以下错误：

{
  "error": {
    "code": "",
    "message": "The property 'regardingobjectid' does not exist on type 'Microsoft.Dynamics.CRM.appointment'. Make sure to only use property names that are defined by the type."

请求

PATCH https://XXXXXXX.crm.dynamics.com/api/data/v8.2/appointments(9de8ba18-8303-e911-8147-3863bb2eb450)

标题：

Content-Type: application/json
Authorization: Bearer *Token*

{
  "subject": "Check Updates",
  "ownerid@odata.bind": "/systemusers(51d09106-22b6-e811-8143-3863bb2ec140)",
  "createdby@odata.bind": "/systemusers(51d09106-22b6-e811-8143-3863bb2ec140)",
  "location": "",
  "description": "nuldasddsadsal",
  "statecode": 3,
  "scheduledstart": "2018-12-19T06:45:00Z",
  "scheduledend": "2018-12-19T07:15:00Z",
  "isalldayevent": false,
  "regardingobjectid": null,
  "activitypointer_activity_parties": [
    {
      "partyid_account@odata.bind": "/accounts(4a2612e2-664b-e411-93ff-0050569469bd)",
      "participationtypemask": "6"
    }
  ]
}

正文：

Content-Type: application/json
Authorization: Bearer *Token*

{
  "subject": "Check Updates",
  "ownerid@odata.bind": "/systemusers(51d09106-22b6-e811-8143-3863bb2ec140)",
  "createdby@odata.bind": "/systemusers(51d09106-22b6-e811-8143-3863bb2ec140)",
  "location": "",
  "description": "nuldasddsadsal",
  "statecode": 3,
  "scheduledstart": "2018-12-19T06:45:00Z",
  "scheduledend": "2018-12-19T07:15:00Z",
  "isalldayevent": false,
  "regardingobjectid": null,
  "activitypointer_activity_parties": [
    {
      "partyid_account@odata.bind": "/accounts(4a2612e2-664b-e411-93ff-0050569469bd)",
      "participationtypemask": "6"
    }
  ]
}

两件事：

1.要使用web api更新/覆盖查找字段值，我们必须使用单值导航属性<代码>关于ObjectId_account@odata.bind

var entity = {};
entity["regardingobjectid_account@odata.bind"] = "/accounts(1F496057-8DE7-E811-A97A-000D3A1A9EFB)";

var req = new XMLHttpRequest();
req.open("PATCH", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/appointments(6D78AD2C-5A16-E811-A955-000D3A1A9407)", true);
req.setRequestHeader("OData-MaxVersion", "4.0");
req.setRequestHeader("OData-Version", "4.0");
req.setRequestHeader("Accept", "application/json");
req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
req.onreadystatechange = function() {
    if (this.readyState === 4) {
        req.onreadystatechange = null;
        if (this.status === 204) {
            //Success - No Return Data - Do Something
        } else {
            Xrm.Utility.alertDialog(this.statusText);
        }
    }
};
req.send(JSON.stringify(entity));

2.如上所述，

PATCH

用于更新所有字段类型的值，除了删除查找值（在查找中更新

null

），我们必须使用

DELETE

和

在一些研究请求之后删除：对于删除目标，我很适合