Empty array is saved when a property references a schema

var FooSchema = new Schema({});
var Foo = mongoose.model("Foo", FooSchema);
var BarSchema = new Schema({
    foos: [Foo.schema]
});
var Bar = mongoose.model("Bar", BarSchema);

var b = new Bar();
b.save();

That will create an empty array of b.foos instead of just leaving the property undefined.

[vkarpov15]

@antonioaltamura I forgot about this issue, the below works in mongoose 4.6:

const CollectionSchema = new Schema({
 field1: { type: [String], default: void 0 }, // <-- override the array default to be undefined
});

const Collection = mongoose.model('test', CollectionSchema);

Collection.create({}).
  then(doc => { console.log(doc); return doc; }).
  then(() => { process.exit(0); });

[ifeltsweet]

Sorry, but this is a horrible design. You should not be deciding on my behalf wether I want it to be an empty array or not set at all. At least provide an option to disable this feature.