添加一个共享点列表项，其中包含“人员或组”类型的列

Question

I am trying to add an item to a list. The list has 2 columns in it: Title and recipientId (it is of type Person or Group ). Now I am using

https:<site url>/_api/web/Lists/getbytitle('list name'>)/items

to create the list. Unfortunately I am unable to figure out what value I should be giving to recipientId (some blogs here mentioned we have to provide the user id. If that is right, how do I get that id or what exactly I should give there for the user to get added there?) This is the json I am using in post man to create the item:

{ "__metadata": 
   {
       "type": "SP.Data.List3ListItem"
   },
   "Title": "Teams incorporate feedback"
}

Answer 1

If your column allow mutiple value:

{
       "__metadata":{
          "type":"SP.Data.TestListItem"//change this value to yours 
       },
       "Title":"Test",
       "supervisorId":{
          "results":[25,26]//user ids
       }
    }

If your column only allow single value:

{
   "__metadata":{
      "type":"SP.Data.TestListItem"
   },
   "Title":"Test",
   "supervisorId":5
   
}

Answer 2

Hopefully this might save someone's time,

so to add a value for a column of type "person or Group"(recipientId in my case). Firstly, we need to have the site users id that you can get from REST API https://<site_url>/sites/<site_name>/_api/web/siteusers . Once you have the ID, you can add it as value for "UsernameId" key value

    { "__metadata": 
{
"type": "SP.Data.List3ListItem"
    
},
"Title": "Varun",
"UsernameId":13

 }

this will add the corresponding user name to the column of type "person or Group"(recipientId in my case).