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我有一个同时具有 navid 和 subnavid 的模型。在销毁模型时，我需要检查整个集合，对于其他模型，其 navid 与我要删除的模型的 subnavid 相同。请帮帮我。提前致谢 。这是我的示例代码。

模型：

var Node = Backbone.Model.extend({ defaults: { NavId: '', SubNavId: ''. ItemName:'' } }

收藏：

var NodeCollection = Backbone.Collection.extend({ model:Node }

我有两个视图，一个用于节点（我正在构建 tr），另一个用于集合（我需要构建表）var NodeCollectionView = Backbone.View.extend（{

initialize: function (options) {
    var self = this;      self.collection = new NodeCollection({ NavigationId: options.NavigationId });
    self.collection.fetch({
        success: function () {
            /*I am getting  hte proper collection from my restful api and iam able to bind it properly
          self.render();
        }
    });
},

render: function () {
    var that = this;
    _.each(this.collection.models, function (item) {
        that.RenderEachNode(item);
    }, this);
},

RenderEachNode: function (item) {
    var TempJsonNode = item.toJSON();
    var self = this;
    var nodeView = new NodeView({
        tagName: 'tr',
        id: 'NavId_' + TempJsonNode.NavItemId,
        model: item
    });
} });

var ItemTemplate = ""; ItemTemplate += "    <td>"; ItemTemplate += "        <a><%= ItemName %></a>"; ItemTemplate +="   </td>"; ItemTemplate
+=" <td>"; ItemTemplate +="         <a href='#' original-title='Delete ' class='tip_north Delete'>X</a>"; ItemTemplate +="  </td>  ";           


var NavigationItemView = Backbone.View.extend({
    template: ItemTemplate,
    render: function () {
        var self = this;
        var tmpl = _.template(this.template);
        this.$el.html(tmpl(this.model.toJSON()));
        return this;
    },
    events: {
        "click .Delete": "DeleteBtnClick"
    },
    DeleteBtnClick: function () {
        var self = this;
        self.model.destroy({
            success: function (status, data) {
                var RetData = JSON.parse(data);
                if (RetData.Status == 'Success') {
                    $(self.el).remove()
                }
            },
            error: function () {
                alert('Error In Deleting The Record');
            }
        });
        return false;
    } });

我能够正确构建表格，但是在销毁模型时，我没有找到销毁依赖模型的方法。我的 Api 受到限制，以至于我无法获得嵌套的 json （如果是这样，我会这样做）骨干关系）。所以我需要找出某种方式来删除具有模型 NavId 的其他模型和视图。

请帮帮我。

4

1 回答 1

2

怎么样：

var NodeView = Backbone.View.extend({
  initialize: function() {
    //when the model gets destroyed, remove the view
    this.listenTo(this.model, 'destroy', this.remove);
  },
  //..clip
  DeleteBtnClick: function () {
    var self = this;
    var collection = self.model.collection;
    var navId = self.model.get('NavId');

    self.model.destroy({
      success: function (status, data) {
        var RetData = JSON.parse(data);
        if (RetData.Status == 'Success') {
          //if parent was part of a collection
          if (collection) {
            //find related models
            var related = collection.filter(function (model) {
              return model.get('SubNavId') === navId;
            });

            //call destroy for each related model.
            var promises = _.invoke(related, 'destroy');

            //optional: if you want to do something when all the children
            //are destroyed:
            $.when.apply($, promises).then(function () {
              console.log('all destroyed');
            });
          }
        }
      },
      error: function () {
        console.log(arguments);
        alert('Error In Deleting The Record');
      }
    });
    return false;
  }
});

编辑： 这里的 JSFiddle

于 2013-02-06T13:40:31.437 回答