استعلامات Mongoose

const all = await User.find();
const adults = await User.find({ age: { $gte: 18 } });
const one = await User.findOne({ email: "b@x.com" });
const byId = await User.findById(id);

await User.updateOne({ _id: id }, { age: 26 });
await User.findByIdAndUpdate(id, { age: 26 }, { new: true });  // يعيد المحدّث

await User.deleteOne({ _id: id });
await User.findByIdAndDelete(id);

const top = await User.find()
  .sort({ age: -1 })
  .limit(5)
  .select("name age");

const postSchema = new mongoose.Schema({
  title: String,
  author: { type: mongoose.Schema.Types.ObjectId, ref: "User" }
});

const posts = await Post.find().populate("author");
// posts[0].author يحوي بيانات المستخدم الكاملة