如何实现backgrid的逐行删除

Question

我一直在尝试为背景网格行实现一个“删除”按钮。这里似乎描述了一种解决方案：

How to add a custom delete option for backgrid rows

然而，我似乎不能让它工作。这是我尝试过的：

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;
    }
});

然后像这样使用它

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&干杯

Answer 1

因为您试图在错误的视图属性上调用函数，所以会出现异常。Backbone视图有两种不同的方式来访问它的el，或者直接在DOM中访问，或者作为jQuery对象访问，如下所示：

1. this.el -这是对DOM element.
2. this.$el的直接引用- DOM元素的jQuery对象。

重要的是要记住，您需要在$el属性上调用像append()和html()这样的函数，因为它们是jQuery函数。

Answer 2

dcarson当然是正确的，但我要非常清楚地说明渲染函数的代码，我可以使用它来正确地工作，使用这个。$el替换了this.el：

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