我想从这个承诺 return 中提取 ID 值,但是如何呢?

I want to extract the ID value from this promise return but how?

我需要获取新上传到 SharePoint Online 文档库的文件的 ID,以便为其添加权限。 这是返回的数据,箭头指向我需要的 ID:

这是代码和承诺链:

this.state.files.forEach( (file, i) => { 
        
  if (file.size <= 10485760) {
  
   var stringId = this.state.Id.toString();
         
sp.web.getFolderByServerRelativeUrl("/mysitepath/").files.add(file.name, file)
   .then(f => {
          
      f.file.getItem().then(async item => {
       const lists = sp.web.lists.getByTitle("MyDocLib");
                         
          item.update({
           JEREF: stringId
             }).then(async (myupdate) => {
                console.log(myupdate); //this is where I get the log from!
                console.log("Metadata update");
                                                   
const ReadroleDefinition = await sp.web.roleDefinitions.getByName("Read").get();

//  await sp.web.lists.getByTitle('MyDocLib')
.items.getById(this.state.JEREF).roleAssignments.add(item, ReadroleDefinition.Id); // This is where I want to add permissions to the newly uploaded file, but can't get the ID!

          });
   });

使用:

myupdate.item["ID"]

测试结果: