CODEWITHSUNDEEP
node.jsmongodbmongoose
Jamo
Jamo

Reputation: 504

(Mongoose) When isModified is false?

I have something like that

UserSchema.pre('save', function(next) {
  console.log(this.isModified());

  next();
});

The output is always true, reading the documentation it says:

Returns true if this document was modified, else false.

I can't find a case when the function returns false.

UPDATE

This is the way I call the save function

let user = new User;

  user.email =  req.body.email;
  user.displayName =  req.body.displayName;
  user.avatar =  req.body.avatar;
  user.password =  req.body.password;

  user.save((err, userStored) => {
    if (err)
      return res.status(500).send({Message: `Error. ${err}`});

    res.status(200).send({product: userStored});
  })

Upvotes: 1

Views: 1796

Answers (1)

Naimish Kher
Naimish Kher

Reputation: 294

This is possible because you are always modifying that data. If you want to check that (isModified === false) then try to update document with previous value(same value as before). You will get a false in nModified.

Like,

let updatedata = {
        'nOtp': nOtp
    };
    Model.update({_id: 'your_id'}, { $set: updatedata }, (error, doc) => {
        if (error) return res.status(500).json(error);
        // **Here below line you can check. If values is same as before**
        if (doc.nModified === 0) return res.status(417).jsonp({message: 'document is not modified'});
        return res.status(200).json({message: 'success'});
    });

You can do it same in your method

Upvotes: 3

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