Meteor injected Models

gistfile1.js

Model = function(attrs) {
    attrs = attrs || {};
    _.extend(this, attrs);
    _raw_attr_keys = _.keys(attrs); 
    this.errors = {};
}

Model.bind = function(model, collectionName){
    var pt = new Model({});
    _.extend(pt, model.prototype);
    model.prototype = pt;
    model.prototype.constructor = model;
    model._collection = new Meteor.Collection(collectionName);
    model.clear = function(){
        model._collection.remove({});
    }
    model.remove = function(selector,options){
        selector = selector || {};
        options = options || {};
        model._collection.remove(selector,options);
    }
    model.findOne = function(selector,options){
        selector = selector || {};
        options = options || {};
        return model._collection.findOne(selector,options);
    }
    model.find = function(selector,options){
        selector = selector || {};
        options = options || {};
        return model._collection.find(selector,options);
    }
    // wrap it good!!!
    var c = model._collection._collection.constructor;
    c.__deepcopy = c._deepcopy;
    c._deepcopy = function(v){
        var dc = c.__deepcopy(v);
        if (typeof dc !== "object"){
            return dc;
        }
        return new model(dc);
    }
}

Model.prototype = {
    persisted: function() {
        return ('_id' in this && this._id != null);
    },

    save: function() {
        var data = _.pick(this,_raw_attr_keys);
        if (this.persisted()) {
            this.constructor._collection.update(this._id,data);
        } else {
            this._id = this.constructor._collection.insert(this,data);
        }
        return this;
    },

    update_attrs: function(attrs) {
        _.extend(this,attrs);
        _raw_attr_keys = _.union(_raw_attr_keys, _.keys(attrs)); 
        return this.save();
    },

    track_attr: function(key) {
        _raw_attr_keys = _.union(_raw_attr_keys, key);
        return this.save();
    },

    destroy: function() {
        if (this.persisted()) {
            this.constructor._collection.remove(this._id);
        }
    }
}

var Request = function(attrs){
    Model.call(this,attrs);
}
// extend request with instance methods
Request.prototype = {
    prefixed: function(){return '---'+this.name;} 
};
// make it all worth while.
Model.bind(Request,'requests');


// usage
var r = new Request({title:'I want more apples'});
r.save()
Request.find(); //collection cursor
Request.findOne(); //object;
r.update_attrs({'body','lorem....'});
r.date = Date.now();
r.track_attr('data');