feat(model): allow serializing model instances into mongodb

[vkarpov15]

Hi,

Admittedly this is a strange PR, but we've seen instances of people trying to store sequelize objects in MongoDB (like agenda/agenda#562 (comment)). It would be handy if sequelize could implement a toBSON() function so the mongodb driver could automatically serialize it correctly.

Thanks and happy holidays!

Valeri

[sushantdhiman]

You can add a method to model instance, add toBSON on prototype

var Model = Sequelize.define('Model', {
   // various attributes
});

Model.prototype.toBSON = function () {
   return this.toJSON();
}

[vkarpov15]

I'm aware of that. However, I think it would be handy to have this functionality baked in to sequelize so end users don't have to think about it. Let me know, we can always just write a plugin instead.

[sushantdhiman]

Yeah, its better if this is handled at application code or as a plugin.