Spread syntax returns unexpected object

Question

I am using node and i have used .

babel-node

    "start": "nodemon --exec babel-node --presets es2015 index.js"

My spread syntax is not working as expected. Here is my code.

   export const login = async (parentValue, { email, password }) => {
  try {
    const user = await User.findOne({
      email
    });
    console.log(user);

    if (!user.authenticateUser(password)) {
      throw new Error('Wrong password');
    }
    const dummyObject = {
      ...user
    };
    console.log({ dummyObject });
    return { ...user };
  } catch (e) {
    console.log(e);
    throw new Error(e.message);
  }
};

The line where i have used console.log(user), it works fine. It returns { id: xxx, name: xxxx }

and I am getting unexpected data on console.log(dummyObject); here is what i get.

{ jojo: 
{ '$__': 
      InternalCache {
        strictMode: true,
        selected: {},
        shardval: undefined,
        saveError: undefined,
        validationError: undefined,
        adhocPaths: undefined,
        removing: undefined,
        inserting: undefined,
        saving: undefined,
        version: undefined,
        getters: {},
        _id: 5c798295f53323b34cabf1ca,
        populate: undefined,
        populated: undefined,
        wasPopulated: false,
        scope: undefined,
        activePaths: [Object],
        pathsToScopes: {},
        cachedRequired: {},
        session: undefined,
        ownerDocument: undefined,
        fullPath: undefined,
        emitter: [Object],
        '$options': [Object] },
     isNew: false,
     errors: undefined,
     _doc: 
      { _id: 5c798295f53323b34cabf1ca,
        fullName: 'sarmad',
        password: '$2a$10$c.XDX75ORXYA4V/hUXWh.usVf2TibmKfY.Zpu3cpTssFaYvsGyhte',
        email: '[email protected]',
        createdAt: 2019-03-01T19:05:57.454Z,
        updatedAt: 2019-03-01T19:05:57.454Z,
        __v: 0 },
     '$init': true } }

Am I doing something wrong? Technically it should return the user object NOTE: I don't want to use Object.assign

Answer 1

Looks like you're using mongoose, and it looks like you're getting the mongoose object properties by using the spread operator. You need to convert to JSON to get rid of these.

Try: const dummyObject = { ...user.toJSON() };

You can also: const dummyObject = { ...user.toObject() };

^ This might be the preferred way

Another solution is to only request a plain object when making your query. For instance:

Schema.findOne(query).lean()

This will return a plain object instead of a mongoose object.