如何使用.where()查询backbone中模型的嵌套对象

// 创建一个模型
var UserModel = Backbone.Model.extend({
  defaults: {
    id: null,
    name: '',
    address: {
      city: '',
      country: ''
    }
  }
});

// 创建一个集合
var UserCollection = Backbone.Collection.extend({
  model: UserModel
});

// 实例化集合并添加模型
var users = new UserCollection([
  { id: 1, name: 'John', address: { city: 'New York', country: 'USA' } },
  { id: 2, name: 'Jane', address: { city: 'London', country: 'UK' } },
  { id: 3, name: 'Bob', address: { city: 'Paris', country: 'France' } }
]);

// 使用.where()查询模型的嵌套对象
var filteredUsers = users.where({ 'address.city': 'London' });

// 遍历匹配的模型并输出属性值
filteredUsers.forEach(function(user) {
  console.log(user.get('name')); // 输出 'Jane'
});