set field as empty for mongo object using mongoose

Question

I\'m calling user.save() on an object, where I set user.signup_date = null;

user.first_name = null;
user.signup_date = null;

user.save();

Answer 1

On Mongoose documentation (Schema Types), you can go to the Arrays explanation. There, it says this:

Arrays are special because they implicitly have a default value of [] (empty array).

var ToyBox = mongoose.model('ToyBox', ToyBoxSchema);
console.log((new ToyBox()).toys); // []

To overwrite this default, you need to set the default value to undefined

(I've made an addition inside the toys element)

var ToyBoxSchema = new Schema({
     toys: {
          type: [{
              name: String,
              features: [String]
          }],
          default: undefined
     }
});