Question

无法将集合获取数据同步到本地数据。以下是代码

以下代码成功从服务器获取数据并呈现给视图。但是当我向集合中添加新元素时，它不会附加到服务器数据，它会创建新集合并添加到该集合。我应该如何将新数据附加到现有服务器数据。

<html>

<head>
  <title>TODO supply a title</title>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>

<body>
  <div>Tag List</div>

  <div id="tagTab">
    <input type="text" name="name" id="name" />
    <button id="addTag"> Add</button>

    <ul id="tagList">
    </ul>

  </div>

  <script type="text/template" id="tag-name-template">

    <li>
      <%= title %>
    </li>
  </script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.0/underscore-min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.3.3/backbone-min.js"></script>



  <script>
    var app = {};

    var tagModel = Backbone.Model.extend({
      defaults: {
        title: 'mak',
        status: false
      },

      initialize: function() {

      }
    });

    var tagCollection = Backbone.Collection.extend({
      model: tagModel,
      initialize: function() {
        //                    console.log("collection added creation");
        //                    this.fetch();
      },
      url: 'https://jsonplaceholder.typicode.com/posts',
      parse: function(response) {
        //                console.log(response);
        for (var i = 0; i < response.length; ++i) {
          //                               s console.log();
          this.add(response[i]);
          //                            this.add(new tagModel({title:response[i].title}));
        }

      }
    });


    var tagNameView = Backbone.View.extend({
      template: _.template($('#tag-name-template').html()),

      initialize: function() {
        this.render();
      },
      render: function() {

        this.$el.html(this.template(this.model.toJSON()));

        return this;
        //                    return this.template(this.mode);
      }
    });

    var tagTabView = Backbone.View.extend({
      el: $('#tagTab'),
      model: new tagCollection(),

      initialize: function() {
        this.render();
        this.model.on('add', this.render, this);

        this.model.fetch();
      },
      render: function() {


        this.$('#tagList').html(''); // clean the todo list
        //                    console.log(this.model);
        for (var i = 0; i < this.model.length; ++i) {
          //                        console.log(this.model.at(i));
          this.$('#tagList').append(new tagNameView({
            model: this.model.at(i)
          }).el);
        }

      },
      events: {
        'click #addTag': 'add'


      },
      //To add the item to collections
      add: function() {


        // this.model.add(new tagModel({title:$("#name").val()}));
        this.model.add({
          title: $("#name").val()
        });
        $("#name").val("");
      }

    });
    app.view = new tagTabView();
  </script>

</body>

</html>

.....

无法同步骨干js集合获取数据

0 个答案: