Question

我在这里阅读了关于这个论点的所有主题，但是我无法理解这段代码是什么，我想要了解它的几个小时：

当我触发事件保存并从TranslationView中删除时，它说“未捕获错误：必须指定”url“属性或函数”。我试图弄清楚其他代码，但即使明确地将url属性添加到集合中它也不起作用...提前谢谢

  /**
 * Translation Collection - The document
 * -- Collection of all translations in a document
 */
var Document = Backbone.Collection.extend({
        model: Translation,
        localStorage: new Backbone.LocalStorage("translations-db")    
    });
var Docs = new Document;

/**
 * Translation View
 * -- A single language version
 * This is a version of translation
 */

var TranslationView = Backbone.View.extend({
    template: _.template('<div class="cnt-translation"><span class="delete-btn">delete</span><span class="save-btn">save</span> Language: <input value="english" /><textarea id="translation_0" class="translation"></textarea></div>'),

    events: { 
      'click span.delete-btn': 'remove',
      'click span.save-btn': 'save'
    },
      //'chnage ul#main-menu #add': 'addText'

    initialize: function(){
      _.bindAll(this, 'render', 'unrender', 'remove','save'); 
      this.listenTo(this.model, 'destroy', this.remove);
    },

    render: function(counter){
      this.$el.html(this.template(this.model.toJSON()));    
      return this;
    },

    unrender: function(){
      $(this.el).remove();
    },

    remove: function(){
      console.log(this.model);
      this.model.destroy();
    },

    save: function(){
      console.log(this.model);
      this.model.save();
      console.log(localStorage);

    }

});


/**
* Translation Main View
* -- The Application
* This is the top level piece of the app
*/

var AppView = Backbone.View.extend({
    el: $('#application'),
    type: 'localStorage', // in future also "remoteStorage"

    events: {
      'click #add_trans': 'createOnEnter',
      'click #save_trans': 'saveTranslations',
      'click #remove_trans': 'removeTranslation'
    },

    initialize: function(){
      _.bindAll(this, 
        'render',
        'saveTranslations',
        'addTranslation'
      ); 
      this.listenTo(Docs, 'add', this.addTranslation);
      this.listenTo(Docs, 'all', this.render);
      this.listenTo(Docs, 'reset', this.reloadAll);
      this.render();
      console.log('initialized and texts loaded');
      Docs.fetch();
    },
    ....

    render: function(){  
      var self = this;
      /*
      _(this.collection.models).each(function(translation){ 
        self.appendTranslation(translation);
      }, this);
      */
    }

    addTranslation: function(){
      console.log('addTrans called');
      var translation = new Translation();
      translation.set({
        id: 'translation_' + Docs.length,
        language: 'english' // modify item defaults
      });
      var translationView = new TranslationView({ model: translation });
      $(this.el).append(translationView.render().el);
      console.log(Docs);
    },

    createOnEnter: function(e) {
      Docs.create({title: 'new trans'});
    }


}); 


var ENTER_KEY = 13;    
var app = new AppView();
console.log(app);
})(jQuery);

Answer 1

您的问题是您尝试保存/销毁从未与本地存储支持的集合关联的模型对象。

本地存储插件首先查找模型上的localStorage属性，如果它找不到localStorage的模型集合，如果仍然没有localStorage发现它回退到Backbone.Sync url行为需要addTranslation才能获得异常。

您有一个无辅助的模型对象，因为您在var translationView = new TranslationView({ model: translation });中创建了一个：

translation

但是你不需要这个，因为这个方法在项目添加到你的集合时调用，你将新添加的项目作为参数。

您只需要使用参数addTranslation: function(translation){ translation.set({ id: 'translation_' + Docs.length, language: 'english' // modify item defaults }); var translationView = new TranslationView({ model: translation }); $(this.el).append(translationView.render().el); },更改方法，而不是创建新参数。

{{1}}

Backbone.js - 必须指定“url”属性或函数

1 个答案: