在子文档MongoDB中检索数组

Question

I have a Users model structure somewhat like this:

const userSchema = new mongoose.Schema({
  email: { type: String, unique: true },
  password: String,

  todosDo: [models.Do.schema],
}

And the child "Do" schema somewhat like this (in a different file):

const doSchema = new mongoose.Schema({
  name: {type: String, default : ''},
  user: {type: mongoose.Schema.ObjectId, ref: 'User'},
  createdAt: {type : Date, default : Date.now}
});

And I'm trying to figure out how to retrieve the todosDo array for the signed in user. This is what I've got so far:

// Get all "Do" todos from DB
// Experimenting to find todos from certain user
  User.findById(req.user.id, function(err, user){
    if(err){
        console.log(err);
    } else {
      doTodos = user.todosDo, // this obviously doesn't work, just an idea of what I was going for
      console.log(doTodos); 
      finished();
    }
  });  

Am I referencing the child/parent wrong or am I just not retrieving the array right? Any help is greatly appreciated!

Answer 1

As far I guess you may want to edit as raw js objects so you need to use lean() function. without using lean() function user is mongoose object so you can't modify it.

can try this one:

User.findById(req.user.id)
  .lean()
  .exec(function (err, user) {
    if(err){
      console.log(err);
      return res.status(400).send({msg:'Error occurred'});
    } 
    if(!user) {
      return res.status(400).send({msg:'User Not found'});
    }

    doTodos = user.todosDo;
    console.log(user.todosDo); // check original todos
    console.log(doTodos);
    return res.status(200).send({doTodos : doTodos }); // return doTodos 

  });

and to refer child schema in parent schema from different model you can access a Model's schema via its schema property.

say in doSchema.js file

const doSchema = new mongoose.Schema({
  name: {type: String, default : ''},
  user: {type: mongoose.Schema.ObjectId, ref: 'User'},
  createdAt: {type : Date, default : Date.now}
});
module.exports = mongoose.model( 'DoSchema', doSchema );

in user.js file

var DoModel = require('./doSchema');// exact path
const userSchema = new mongoose.Schema({
  email: { type: String, unique: true },
  password: String,

  todosDo: [DoModel.schema],
}

Answer 2

Thanks for your help everybody! My problem was that I needed to push all the newly created todos in the post route to todosDo, so then I could retrieve them at the get route. Everything's working now!