我有两个不同的模式User和Article一个用户可以发布多篇文章，其关系是一对多。

const mongoose = require("mongoose");

const userSchema = mongoose.Schema(
    {
    username: {
        type: String,
        required: [true, "Please add the username"],
    }
    articles: [{
        type: mongoose.Schema.Types.ObjectId,
        ref: 'Article'
    }]
);

module.exports = mongoose.model("User", userSchema);

Article Schema是：

const mongoose = require("mongoose");

const articleSchema = mongoose.Schema(
    {
    postTitle: {
        type: String,
        required: [true, "Please add Post Title"],
    },
    publisher: {
        type: mongoose.Schema.Types.ObjectId,
        ref: 'User'
    }
);

module.exports = mongoose.model("Article", articleSchema);

这是我的创建文章控制器：

const createArticle = asyncHandler( async(req, res, next) => 
{
    const { postTitle } = req.body;
    const currentUser = req.user;

    const article = await Article.create(
        {
            postTitle,
            publisher: currentUser.id
        }
    )
    res.status(201).json(article);
}
);

我希望当我创建一篇文章时，发布者会得到用户对象，这确实发生了，但我所期望的是用户对象字段文章也应该填充该文章ID为什么没有发生？因为我已经在他们schehmas中建立了关系