Question

我还在试图弄清楚ember是如何工作的，我希望在ember中有更多关于管理多个复选框的信息。
这就是我试图做的事：http://jsbin.com/datojebu/2/edit
正如您所看到的那样，所有复选框都被选中，并且未检查被检查的函数这样做的正确方法是什么？

Answer 1

立即检查。 http://jsbin.com/datojebu/3/edit

  {{#each genre in genres}}
       {{input type="checkbox" name=genre.id checked=genre.isChecked}} {{genre.nom}}
  {{/each}}

你必须添加genre.isChecked else同样isChecked将绑定到所有复选框。

BTW如果你想拥有每个项目的控制器，你可以在数组控制器中添加ItemController。这是另一个例子。

/* controllers */
App.AnimesController = Ember.ArrayController.extend({
  itemController: 'anime'
});

Answer 2

除了您的其他问题之外，我已基本完成了您的应用：

http://jsbin.com/datojebu/11/edit

App = Ember.Application.create();
App.ApplicationAdapter = DS.RESTAdapter.extend({
    host: '/api',
    namespace: 'fr'
});

/* router */
App.Router.map(function() {
  this.resource('animes');
});
App.AnimesRoute = Ember.Route.extend({
  model: function() {
    return this.store.find('anime');
  },
  setupController: function(controller, model) {
    this._super();
    this.store.find('genre').then(function(genres) {
      controller.set('genres', genres);
    });
    controller.set('model', model);
  }
});

/* models */
var model = DS.Model,
    attr = DS.attr,
    hasMany = DS.hasMany;

App.Genre = model.extend({
    animes: hasMany('anime', {async: true}),
    nom: attr('string')
});
App.Anime = model.extend({
    nom: attr('string'),
    parution: attr('number'),
    synopsis: attr('string'),
    likes: attr('number'),
    auteur: attr('string'),

    genres: hasMany('genre', {async: true})
});
/* controllers */
App.AnimesController = Em.ArrayController.extend({
  genres: Em.A([]),
  selectedGenreIds: Em.A([]), // a set of ids
  selectedGenres: function() {
    var genres = this.get('genres'),
        selectedGenreIds = this.get('selectedGenreIds');
    return genres.filter(function(genre) {
      return selectedGenreIds.contains(genre.get('id'));
    });
  }.property('selectedGenreIds.@each', 'genres.@each'),
  selectedAnimes: function() {
    var allAnimes = this.get('model'),
        selectedGenres = this.get('selectedGenres'),
        filteredAnimes;
    // for an anime to be shown, it has to have at
    // least one of its genres selected
    filteredAnimes = allAnimes.filter(function(anime) {
      return anime.get('genres').any(function(animeGenre) {
        return selectedGenres.contains(animeGenre);
      });
    });
    return filteredAnimes;
  }.property('model.@each', 'selectedGenres.@each', 'genres.@each')
});
App.GenreController = Em.ObjectController.extend({
  needs: ['animes'],
  isChecked: function(key, value) {
    if(arguments.length > 1) {
      // setter
      var selectedGenreIds = this.get('controllers.animes.selectedGenreIds'),
          thisId = this.get('id');
      if(!selectedGenreIds.contains(thisId) && value) {
        selectedGenreIds.addObject(thisId);
      } else {
        selectedGenreIds.removeObject(thisId);
      }
    }
    // always return the value for the getter and the setter
      return value;
  }.property('controllers.animes.selectedGenreIds')
});

/* mockjax */
var animes = [
    {
        id: 1,
        nom: 'Blah',
        parution: 2014,
        genres: [1, 3],
        synopsis: 'Lorem ipsum dolor sit amet, consectetur adipisicing elit. Tempore, eveniet, ab pariatur omnis dolor sunt alias atque voluptate neque reiciendis maiores impedit quibusdam perferendis optio ratione expedita adipisci et. Cupiditate!',
        likes: 206,
        auteur: 'Moi :p'
    }
],
genres = [
    {
        id: 1,
        nom: 'action',
        animes: []
    },
    {
        id: 2,
        nom: 'magie',
        animes: [1]
    },
    {
        id: 3,
        nom: 'amour et amitier',
        animes: []
    },
    {
        id: 4,
        nom: 'aventures',
        animes: [1]
    }
];
$.mockjax({
  url: '/api/fr/animes',
  responseTime: 750,
  responseText: {
    'animes': animes
  }
});
$.mockjax({
  url: '/api/fr/genres',
  responseTime: 750,
  responseText: {
    'genres': genres
  }
});

Answer 3

你需要像CodeJack所说的那样......

完成后，使用绑定“知道”检查哪一个。也就是说你不需要自己知道，你只需要将正确的值绑定到正确的位置。

无论如何，这个jsbin应该可以缓解你的问题...注意控制台设置了值并在正确的tiems / places处触发。

http://jsbin.com/datojebu/6/edit

App = Ember.Application.create();
App.ApplicationAdapter = DS.RESTAdapter.extend({
    host: '/api',
    namespace: 'fr'
});

/* router */
App.Router.map(function() {
  this.resource('animes');
});
App.AnimesRoute = Ember.Route.extend({
    model: function() {
        return this.store.find('anime');
    },
  setupController: function(controller, model) {
        this._super(controller, model);
        this.store.find('genre').then(function(genres){
            controller.set('genres', genres);
        });
    }
});

/* models */
var model = DS.Model,
    attr = DS.attr,
    hasMany = DS.hasMany;

App.Genre = model.extend({
    animes: hasMany('anime', {async: true}),
    nom: attr('string')
});
App.Anime = model.extend({
    nom: attr('string'),
    parution: attr('number'),
    synopsis: attr('string'),
    likes: attr('number'),
    auteur: attr('string'),

    genres: hasMany('genre', {async: true})
});
/* controllers */
App.GenreController = Em.ObjectController.extend({
  isChecked: function(key, value) {
    if(arguments.length > 1) {
      // setter
      console.log('huzzah' + this.get('id') + ' val: ' + value);      
    }
    // always return the value for the getter and the setter
    return this.get('model.isChecked');
  }.property(),
  actions: {
  click: function() {
    console.log("hi");
  }    
  }
});

/* mockjax */
var animes = [
    {
        id: 1,
        nom: 'Blah',
        parution: 2014,
        genres: [1, 3],
        synopsis: 'Lorem ipsum dolor sit amet, consectetur adipisicing elit. Tempore, eveniet, ab pariatur omnis dolor sunt alias atque voluptate neque reiciendis maiores impedit quibusdam perferendis optio ratione expedita adipisci et. Cupiditate!',
        likes: 206,
        auteur: 'Moi :p'
    }
],
genres = [
    {
        id: 1,
        nom: 'action',
        animes: []
    },
    {
        id: 2,
        nom: 'magie',
        animes: [1]
    },
    {
        id: 3,
        nom: 'amour et amitier',
        animes: []
    },
    {
        id: 4,
        nom: 'aventures',
        animes: [1]
    }
];
$.mockjax({
  url: '/api/fr/animes',
  responseTime: 750,
  responseText: {
    'animes': animes
  }
});
$.mockjax({
  url: '/api/fr/genres',
  responseTime: 750,
  responseText: {
    'genres': genres
  }
});

如何在ember中管理多个复选框？

3 个答案: