Mongoose $或嵌套数组的条件

Question

There are my schemas

//ProjectModel
const ProjectSchema: Schema = new Schema(
 owner: { type: Schema.Types.ObjectId, ref: "User" },
 users: [{type: Schema.Types.ObjectId, ref: "ProjectUser", unique: true }]
);

//Project User model
const ProjectUserSchema = new Schema(
  {
    user: { type: Schema.Types.ObjectId, ref: "User", require: true },
    role: {
      type: String,
      default: 'basic',
      enum: ["basic", "projectuser", "moderator", "admin"]
    },
    project: { type: Schema.Types.ObjectId, ref: "Project", require: true },
  },
  {
    timestamps: true,
    usePushEach: true,
  }
);

The User model has common fields like password, name, etc.

I want to find User of a ProjectModel either among the owner (UserSchema) or among users (ProjectUserSchema)

ProjectModel.findOne()
                    .or([{ owner: req.params.user }, { "users.user": req.params.user }])
                    .then(project => {
                        res.json(project);
                    });

But it returns null. And condition .or([{ owner: req.params.user }, { "users._id": "PROJECT USER ID" }]) doesn't work either.

What should I do?

Answer 1

You need to convert the incoming req.params.user from string to ObjectId . Try this:

const mongoose = require('mongoose');

const getProjectByUser = (req, res) => {
  let userId = mongoose.Types.ObjectId(req.params.user);

  ProjectModel
    .findOne({
      $or: [
        { "owner": userId },
        { "users": userId }
      ]
    })
    .then(project => {
      res.json(project);
    })
    .catch(e => {
      res.json({ error: "Error!" });
    });
}