我如何在猫鼬中填充自己模态的引用

Question

如何在 mongoose 中填充自己模态的引用。是否可以存储自己的 ref 。当我尝试填充它时给出 RefrenceError。

const mongoose = require('mongoose');

const userSchema =  mongoose.Schema({
username: {
   type: String,
   required: true
},
fullname: {
   type: String,
   required: true
},
followers: [
  {
    type : mongoose.Types.ObjectId,
    ref : "User"
 }
],

});

const User = mongoose.model("User" , userSchema);

module.exports = User;

Answer 1

.populate( "followers" ) 工作正常，即使您在关注者中存储对用户本身的引用。

如果您至少显示您认为会引发错误的代码，这会容易得多。

这是一个完整的工作示例，使用您的架构：

// Async/await to make things simple
async function run () {
  await mongoose.connect('mongodb://localhost', { useUnifiedTopology: true, useNewUrlParser: true })
  
  // Create, add the user to it's own followers, save.
  const user = new User({ username: 'aaa', fullname: 'bbb' })
  user.followers.push(user)
  await user.save()

  // Populate as usual
  const users = await User.find({})
    .populate('followers')
    .exec()

  // Stringify or else node will compact the output of deeply nested objects.
  console.log(JSON.stringify(users, null, 4))
}

run()

我如何在猫鼬中填充自己模态的引用

how can i populate ref of own modal in mongoose

mongoose

mongodb

mongodb-query

mongoose-populate

mongoose-schema