构造函数式数据源合并

Base.js

var LOAD_ENTITY = {
  entity: function (model) {
    return model.findById(model.get('id'));
  }
};

var TRANSLATE_NAME = {
  name: function (model) {
    return mode.get('lastName') + ' ' + model.get('firstName');
  }
}

function BaseModel() {
  this.putDatasource(LOAD_ENTITY, 0);
  this.putDatasource(TRANSLATE_NAME, 1);
}

Child.js

var LOAD_USER_LIST = {
  list: function (model) {
    return model.list();
  }
};

function Child() {
  Base.apply(this, arguments);
  this.putDatasource(LOAD_USER_LIST, 0);
}

inherits(Child, Base);

// LOAD_ENTITY + LOAD_USER
// TRANSLATE_NAME
// loaded