Which People Picker property is being used to update SharePoint User/Group column

Question

I am trying to update the value of a Person / Group column, based on an input I am receiving from Office UI Fabric People Picker, but seem unable to do so.

As per my research the property I should be using must be the User .Key, or the .Id, but none of them seem to work. I also tried with DisplayText and Login name, but that didn't work out either.

Error message observed: An internal error 'ODataJsonLightPropertyAndValueDeserializer_ReadPropertyValue' occurred."

Answer 1

Found the answer.

In order for the update operation to succeed,

1) The correct property to be used is the Id; 2) An Id needs to be added to the column name in the JSON object we are posting as well:

example:

    let managerId = this.state.Manager.User.Id;

    let addMetaDataOpts: ISPHttpClientOptions =  {
    body: `{
      "Title": "Projectmetadata",
      "projectManagerId": "${managerId}"
  }`
};

(here the original column name is projectManager, and we are adding the Id in the end)

reference: Update person or group field using REST API in Document Library