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显示ember.js中的项目数(display number of items in ember.js)

 我需要一个非常简单的事情，并在网上查找已建立的解决方案，告诉我我的代码是正确的。 但显然不是。 我只需要在我的应用中显示我有多少笔记（模型）： 
 

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title> Notes and bookmarks </title>
  <link rel="stylesheet" href="css/style.css">
</head>
<body>

<script type="text/x-handlebars" data-template-name="index">  
    <div class="wrap">
      <div class="bar">
        <input type="text" class="search" />
        <div class="bar-buttons">
          <button> NEW </button>
          <button> HOME </button>
        </div>
      </div>
      <aside>
        <h4 class="all-notes">All Notes {{all}}</h4>
          {{#each item in model}}
            <li>
              {{#link-to 'note' item}} {{item.title}} {{/link-to}}
            </li>
          {{/each}}
      </aside>
      {{outlet}}
    </div> 
</script>

 <script type="text/x-handlebars" data-template-name="main"> 
 <section>
 <h2>Hellooo</h2>
 </section>
 </script>


  <script type="text/x-handlebars" data-template-name="note"> 
    <section>
        <div class="note">
            {{#if isEditing}}
              <h2 class="note-title input-title"> {{edit-input-note value=title focus-out="modified" insert-newline="modified"}} </h2>
              <p class="input-body"> {{edit-area-note value=body focus-out="modified" insert-newline="modified"}} </p>
              {{edit-input-note value=url focus-out="modified" insert-newline="modified"}}
            {{else}}
              <h2 {{action "editNote" on="doubleClick"}} class="note-title" > {{title}} </h2>
              <button {{action "removeNote"}} class="delete"> Delete </button>
              <p {{action "editNote" on="doubleClick"}}> {{body}} </p>
              {{input type="text" placeholder="URL:" class="input"  value=url }}
            {{/if}}
        </div>
      </section>
  </script>

  <script src="js/libs/jquery-1.9.1.js"></script>
  <script src="js/libs/handlebars-1.0.0.js"></script>
  <script src="js/libs/ember-1.1.2.js"></script>
  <script src="js/libs/ember-data.js"></script>

  <script src="js/app.js"></script>
  <script src="js/router.js"></script>
  <script src="js/models/note_model.js"></script>
  <script src="js/controllers/note_controller.js"></script>
  <script src="js/controllers/notes_controller.js"></script>
  <script src="js/views/note_view.js"></script>
</body>
</html>

 

 我的模特： 
 

    Notes.Note = DS.Model.extend ({
    title: DS.attr('string'),
    body: DS.attr('string'),
    url: DS.attr('string')
});

Notes.Note.FIXTURES = [
    {
        id: 1,
        title: 'hello world',
        body: 'ciao ciao ciao ciao',
        url: ''
    },
    {   
        id: 2,
        title: 'javascript frameworks',
        body: 'Backbone.js, Ember.js, Knockout.js',
        url: '...'

    },
    {
        id: 3,
        title: 'Find a job in Berlin',
        body: 'Monster, beralinstartupjobs.com',
        url: '...'
    }
]

 

 我的笔记控制器： 
 

Notes.NotesController = Ember.ArrayController.extend ({
    all: function () {
        var notes = this.get('model');
        return notes.get('lenght');
    }.property('model')
});

 

 我认为这是使这项工作的所有重要代码，但如果你需要其他部分我将添加。 为什么我在{{all}}中看不到我的笔记数量？ 

I need a very easy thing and looking on the web the solutions founded tell me that my code is right. But clearly isn't. I just need to display how many notes(models) I have in my app:
 

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title> Notes and bookmarks </title>
  <link rel="stylesheet" href="css/style.css">
</head>
<body>

<script type="text/x-handlebars" data-template-name="index">  
    <div class="wrap">
      <div class="bar">
        <input type="text" class="search" />
        <div class="bar-buttons">
          <button> NEW </button>
          <button> HOME </button>
        </div>
      </div>
      <aside>
        <h4 class="all-notes">All Notes {{all}}</h4>
          {{#each item in model}}
            <li>
              {{#link-to 'note' item}} {{item.title}} {{/link-to}}
            </li>
          {{/each}}
      </aside>
      {{outlet}}
    </div> 
</script>

 <script type="text/x-handlebars" data-template-name="main"> 
 <section>
 <h2>Hellooo</h2>
 </section>
 </script>


  <script type="text/x-handlebars" data-template-name="note"> 
    <section>
        <div class="note">
            {{#if isEditing}}
              <h2 class="note-title input-title"> {{edit-input-note value=title focus-out="modified" insert-newline="modified"}} </h2>
              <p class="input-body"> {{edit-area-note value=body focus-out="modified" insert-newline="modified"}} </p>
              {{edit-input-note value=url focus-out="modified" insert-newline="modified"}}
            {{else}}
              <h2 {{action "editNote" on="doubleClick"}} class="note-title" > {{title}} </h2>
              <button {{action "removeNote"}} class="delete"> Delete </button>
              <p {{action "editNote" on="doubleClick"}}> {{body}} </p>
              {{input type="text" placeholder="URL:" class="input"  value=url }}
            {{/if}}
        </div>
      </section>
  </script>

  <script src="js/libs/jquery-1.9.1.js"></script>
  <script src="js/libs/handlebars-1.0.0.js"></script>
  <script src="js/libs/ember-1.1.2.js"></script>
  <script src="js/libs/ember-data.js"></script>

  <script src="js/app.js"></script>
  <script src="js/router.js"></script>
  <script src="js/models/note_model.js"></script>
  <script src="js/controllers/note_controller.js"></script>
  <script src="js/controllers/notes_controller.js"></script>
  <script src="js/views/note_view.js"></script>
</body>
</html>

 

My model:
 

    Notes.Note = DS.Model.extend ({
    title: DS.attr('string'),
    body: DS.attr('string'),
    url: DS.attr('string')
});

Notes.Note.FIXTURES = [
    {
        id: 1,
        title: 'hello world',
        body: 'ciao ciao ciao ciao',
        url: ''
    },
    {   
        id: 2,
        title: 'javascript frameworks',
        body: 'Backbone.js, Ember.js, Knockout.js',
        url: '...'

    },
    {
        id: 3,
        title: 'Find a job in Berlin',
        body: 'Monster, beralinstartupjobs.com',
        url: '...'
    }
]

 

And my notes controller:
 

Notes.NotesController = Ember.ArrayController.extend ({
    all: function () {
        var notes = this.get('model');
        return notes.get('lenght');
    }.property('model')
});

 

I think that's all the important code for make this work but if you need others part I will add. Why i can't see the number of my notes in {{all}} ? 

原文：https://stackoverflow.com/questions/19694474
更新时间：2022-08-21 09:08

最满意答案

 最简单的方法可能是创建一个带有内容的（临时） FileHandle并使用它来加载地图。 
 

 默认情况下， TmxMapLoader将使用InternalFileHandleResolver 。 这不起作用，因为您无法在运行时创建内部文件。 
 

 这就是为什么你要使用ExternalFileHandleResolver作为地图加载器，创建一个外部文件并将当天的地图写成一个字符串。 
 

String mapOfTheDay = ...;
FileHandle mapOfTheDayFile = Gdx.files.external("mygame/mapoftheday.tmx");
mapOfTheDayFile.writeString(mapOfTheDay, false);
TiledMap tileMap = new TmxMapLoader(new ExternalFileHandleResolver()).load("mygame/mapoftheday.tmx");


The easiest way would probably be to create a (temporary) FileHandle with the content and use that to load the map.
 

By default TmxMapLoader will use an InternalFileHandleResolver. This won't work, because you cannot create internal files at runtime.
 

That's why you would instead use an ExternalFileHandleResolver for the map loader, create an external file and write your map of the day as a string into it.
 

String mapOfTheDay = ...;
FileHandle mapOfTheDayFile = Gdx.files.external("mygame/mapoftheday.tmx");
mapOfTheDayFile.writeString(mapOfTheDay, false);
TiledMap tileMap = new TmxMapLoader(new ExternalFileHandleResolver()).load("mygame/mapoftheday.tmx");

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