具有RequireJS的骨干关系子模型

Question

我正在尝试找到一种方法来使用带有RequireJS的Backbone关系子模型,其中子模型与超级模型位于不同的文件中.

例如:

// app.js
define(function() {
  var app = {};
  var app.ns = {};
  Backbone.Relational.store.addModelScope(app.ns);
});

// Classroom/Person.js
define(["app", "./Student", "./Professor"], function(app) {
  app.ns.Classroom.Person = Backbone.RelationalModel.extend({
    subModelTypes: {
      'Student': 'Classroom.Student'
      'Professor': 'Classroom.Professor'
    },

    alertHello: function() {}
  });

  return app.ns.Classroom.Person;
});

// Classroom/Student.js
define(["require", "app", "./Person"], function(require, app) {
  app.ns.Classroom.Student = require("./Person").extend({
    alertHello: function() {
      alert("Hello, I am student " + this.get("name"));
    }
  });

  return app.ns.Classroom.Student;
});

// Classroom/PersonCollection.js
define(["app", "./Person"], function (app, Person) {
  app.ns.Classroom.PersonCollection = Backbone.Collection.extend({
    model: Person
  });
});

// alertPeople.js
define(["Classroom/PersonCollection"], function(PersonCollection) {
  var people = PersonCollection([{"name": "Bob", "type": "Person"}]);
  people.each(function(person) {
    person.alertHello();
  });
});

当我执行alertPeople.js时,我期待一个警告"你好,我是学生鲍勃",但我得到了这个错误:Uncaught Error: Module name "Classroom/Person" has not been loaded yet for context: _由于我的循环依赖.什么是解决这个问题的可能解决方案？

我的下一个问题可能与Backbone-relational的范围有关.在我的app.js文件中,我添加了app.ns作为范围的一部分,并确保我的所有模型都在app.ns对象中定义.我这样做,所以当我定义我的subModelTypes时,它实际上可以引用子模型,但我不确定这是否可行,因为我无法通过循环依赖问题.

任何帮助是极大的赞赏.谢谢!

Answer 1

我最终解决了这个问题,我希望将来能有所帮助.

首先,我将代码修改为以下内容:

// app.js
define(function() {
  var app = {};
  var app.ns = {};
  Backbone.Relational.store.addModelScope(app.ns);
});

// Classroom/Person.js
define(["app"], function(app) {
  app.ns.Classroom.Person = Backbone.RelationalModel.extend({
    subModelTypes: {
      'Student': 'Classroom.Student'
      'Professor': 'Classroom.Professor'
    },

    alertHello: function() {}
  });

  return app.ns.Classroom.Person;
});

// Classroom/Student.js
define(["app", "./Person"], function(app, Person) {
  app.ns.Classroom.Student = Person.extend({
    alertHello: function() {
      alert("Hello, I am student " + this.get("name"));
    }
  });

  return app.ns.Classroom.Student;
});

// Classroom/PersonCollection.js
define(["app", "./Person", "./Student", "./Professor"], function (app, Person) {
  app.ns.Classroom.PersonCollection = Backbone.Collection.extend({
    model: Person
  });
});

// alertPeople.js
define(["Classroom/PersonCollection"], function(PersonCollection) {
  var people = PersonCollection([{"name": "Bob", "type": "Person"}]);
  people.each(function(person) {
    person.alertHello();
  });
});

我的更改包括删除Classroom/Person.js文件中的Student和Professor依赖项,并将它们移动到Classroom/PersonCollection.js文件中.

在此之后,我遇到了一个关于Backbone-relational的bug,其中addModelScope有一个子模型和名称空间的bug,但是我修复了它并发出了拉取请求:https://github.com/PaulUithol/Backbone-relational/pull/211 ,已被接受.

可以在https://github.com/andrewferk/backbone-relational-submodels找到更完整的示例.