"pre" and "post" remove Middleware not firing

Question

I have implemented two different ways to remove a user and not one of them fires the "pre" and "post" remove Middleware.

As I understand

Below are my two different implementations in my model file:

Method One:

var User = module.exports = mongoose.model('User', userSchema);

userSchema.pre('remove', function(next) {
    // 'this' is the client being removed. Provide callbacks here if you want
    // to be notified of the calls' result.
    //Vouchers.remove({user_id: this._id}).exec();
    console.log("pre test");
    next();
});

userSchema.post('remove', function(next) {
    // 'this' is the client being removed. Provide callbacks here if you want
    // to be notified of the calls' result.
    //Vouchers.remove({user_id: this._id}).exec();
    console.log("post test");
    next();
});

// Remove User
module.exports.removeUser = function(id, callback){
    var query = {_id: id};
    console.log('test');
    //User.remove(query, callback);
    User.find(query).remove(callback);

}

Method Two:

var User = module.exports = mongoose.model('User', userSchema);

userSchema.pre('remove', function(next) {
    // 'this' is the client being removed. Provide callbacks here if you want
    // to be notified of the calls' result.
    //Vouchers.remove({user_id: this._id}).exec();
    console.log("pre test");
    next();
});

userSchema.post('remove', function(next) {
    // 'this' is the client being removed. Provide callbacks here if you want
    // to be notified of the calls' result.
    //Vouchers.remove({user_id: this._id}).exec();
    console.log("post test");
    next();
});

// Remove User
module.exports.removeUser = function(id, callback){
    var query = {_id: id};
    console.log('test');
    User.remove(query, callback);
}

Answer 1

This is how I got everything working:

// Remove User
module.exports.removeUser = function(id, callback){

    User.findById(id, function (err, doc) {
        if (err) {

        }

        doc.remove(callback);
    })
}

//Remove vouchers related to users
userSchema.pre('remove', function(next) {
    this.model('Voucher').remove({ user: this._id }, next);
});

Answer 2

http://mongoosejs.com/docs/middleware.html Please refer to the documentation. By design the middleware hook for remove is not fired for Model.remove, only for ModelDocument.remove function.