Embedded document middleware doesn't get passed arguments on save

Define Middlware:

embeddedSchema.pre('save', function(next) {
    console.log(arguments);
    next();
});

mainSchema.pre('save', function(next, myParam, callback) {
    console.log(arguments);
    next(callback);
});

Test Middleware

var newModel = new mainModel({
    title: 'new-track'
});

newModel.save('my-first-param', function(err){
    newModel.stars.push({ name: 'foo' });
    newModel.save('my-second-param', function(err) {
        console.log('DONE');
    });
});

Log Result:

// The first mainSchema pre save middleware arguments
{
  '0': [Function: fnWrapper],
  '1': 'my-first-param', // <- Param passed into mainSchema save middleware
  '2': [Function]
}

// The embeddedSchema pre save middleware arguments
{
  '0': [Function: fnWrapper],
  '1': [Function]
}

// The second mainSchema pre save middleware arguments
{
  '0': [Function: fnWrapper],
  '1': 'my-second-param', // <- Param passed into mainSchema save middleware
  '2': [Function]
}
DONE

As you can see the main schema receives the correct arguments, but the embedded document middleware doesn’t. I need to pass arguments to the embedded document’s pre save middleware, how is this possible?

[aheckmann]

work around: you can inspect the embedded documents parent in its pre by accessing its parent property.

a terrible hack prone to race conditions:

a = new newModel;
a._saveArg = 'hack';

embedded.pre('save', function (next) {
  console.log(this.parent._saveArg);
  next();
})

[wilsonpage]

Thanks a lot, for your help! Unless you think the feature I suggested is required, I don’t mind you closing this issue.