如何为backgrid实现每行删除

时间:2013-07-12 09:53:29

标签: javascript backbone.js backgrid

我一直在尝试为backgrid行实现“删除”按钮。这里似乎描述了一个解决方案:

How to add a custom delete option for backgrid rows

然而,我似乎并没有让它发挥作用。这是我试过的:

var DeleteCell = Backgrid.Cell.extend({
    template: _.template('<button>Delete</button>'),
    events: {
      "click": "deleteRow"
    },
    deleteRow: function (e) {
      console.log("Hello");
      e.preventDefault();
      this.model.collection.remove(this.model);
    },
    render: function () {
      this.el.html(this.template());
      this.delegateEvents();
      return this;
    }
});

然后像

一样使用它
var columns = [{
        name: "id", // The key of the model attribute
        label: "ID", // The name to display in the header
        editable: false, // By default every cell in a column is editable, but *ID* shouldn't be
        renderable: false,
        // Defines a cell type, and ID is displayed as an integer without the ',' separating 1000s.
        cell: Backgrid.IntegerCell.extend({
            orderSeparator: ''
        })
    }, {
        name: "weight",
        label: "Hello",
        cell: DeleteCell
    },{
        name: "datemeasured",
        label: "DateMeasured",
        // The cell type can be a reference of a Backgrid.Cell subclass, any Backgrid.Cell subclass instances like *id* above, or a string
        cell: "datetime" // This is converted to "StringCell" and a corresponding class in the Backgrid package namespace is looked up
    },{
        name: "weight",
        label: "Weight",
        cell: "number" // An integer cell is a number cell that displays humanized integers
    }];

我得到的是一个错误:

TypeError: this.el.html is not a function
[Break On This Error]   

this.el.html(this.template());

有什么建议吗?

谢谢&amp;欢呼声

2 个答案:

答案 0 :(得分:4)

您遇到异常,因为您尝试在错误的视图属性上调用该函数。骨干视图有两种不同的方式来访问它的el,可以直接在DOM中,也可以作为jQuery对象,如下所示:

  1. this.el - 这是对DOM元素的直接引用。
  2. this.$el - DOM元素的jQuery对象。
  3. 重要的是要记住,您需要在append()属性上调用html()$el等函数,因为它们是jQuery函数。

答案 1 :(得分:0)

dcarson当然是正确的,但只是非常简单地拼出渲染函数的代码,我可以用它来使这个正常工作,用这个。$ el替代this.el:

render: function () {
    this.$el.html(this.template());
    this.delegateEvents();
    return this;
}