Mongoose advanced custom schema object type

node.js mongodb mongoose mongoose-schema mongoose-plugins

I found a solution thanks to @vkarpov15 on github.com:

SchemaType.prototype.cast() is needed to correctly hydrate the document model from raw mongodb representation, and throw an error in case of invalid data.
To customize mongodb persistence, I had to implement a toBSON() function in my custom type object prototype (i.e. Polygon).
model.toObject() / model.toJSON() currently doesn't call recursively toObject()/toJSON() on all children, but it looks like it will be fixed. But I could overload it as temporary workaround assigning a custom schema.methods.toObject() instance method.

CodeHunter