Bones Attachment Model And Document Model

connection.js

var _ = Bones._;
var sync = Document.prototype.sync;

Document.prototype.sync = function (method, model, options) {
  var self = this;
  var properties = this.getSchema().getProperty('properties');
      var names = properties.getPropertyNames();
      _.each(names, function(name, index) {
        var property = properties.getProperty(name);
        // Maybe I should use function instead of directly access value;
        if (property.getProperty('type')._value == 'file') {
          // We trigger the event with property name type;
          self.trigger('type:file', self, method, model, options);
        }
  });
}

var UserProfile = Document.extend({
  schema: {
    'properties': {
       'gravatar':{'type': 'file'},
       'name': {'type': 'string'},
     }
  }
});

// Test code.
var d = new Document();
d.set({
  'gravatar': {filename: ''},
  'name': 'jackey'
});

d.bind('type:file', function (method, model, options) {
  // Save file here.
});

d.save();