javascript - Knockout.js ko.mapping.fromjs 在绑定(bind)中包含一个属性

Question

这是我的代码，不起作用

 var getUpdates = setInterval(function () {  
            $.getJSON("@Url.Action("GetLists", "Home")?id=" + self.selectedboard(), function (data) {                           
                        var mapping = {
                            // only include these two properties
                            'include': ["cardlists"]
                        }
                        ko.mapping.fromJS(data, mapping, self.lists);
                        ko.applyBindings(helloWorldModel);
                    });                  
                }, 3000);

数据正在返回

[{"boardid":1,"boardname":"asdasd","listid":15,"listname":"asdasd","cardvisiblity":true,"showlist":false,"listremove":false,"showRenderTimes":false,"cardlists":[{"cardid":23,"cardname":"7","listid":15},{"cardid":24,"cardname":"3","listid":15},{"cardid":27,"cardname":"asdasd","listid":15},{"cardid":38,"cardname":"asdasd","listid":15}]},{"boardid":1,"boardname":"asdasd","listid":22,"listname":"asdasd","cardvisiblity":true,"showlist":false,"listremove":false,"showRenderTimes":false,"cardlists":[{"cardid":33,"cardname":"asdasd","listid":22},{"cardid":39,"cardname":"asdasd","listid":22},{"cardid":41,"cardname":"qdasd","listid":22}]},{"boardid":1,"boardname":"asdasd","listid":23,"listname":"asdasd","cardvisiblity":true,"showlist":false,"listremove":false,"showRenderTimes":false,"cardlists":[{"cardid":34,"cardname":"asdasd","listid":23},{"cardid":40,"cardname":"asdasd","listid":23}]},{"boardid":1,"boardname":"asdasd","listid":24,"listname":"asdasd","cardvisiblity":true,"showlist":false,"listremove":false,"showRenderTimes":false,"cardlists":[{"cardid":35,"cardname":"qweqwe","listid":24},{"cardid":36,"cardname":"asdasd","listid":24},{"cardid":37,"cardname":"asdasd","listid":24},{"cardid":42,"cardname":"sdfsdf","listid":24},{"cardid":43,"cardname":"asdasd","listid":24}]}]

如何在绑定(bind)中仅包含卡片列表？

如何在绑定(bind)中排除 showRenderTimes？

Answer 1

通过使用 include 关键字，您只能添加属于不已经属于原始对象的任何属性。

通过使用ignore关键字，您可以指定您不想映射的对象属性。

因此，在您的情况下，您可以指定您不想成为映射一部分的所有属性，并且只保留 cardlists 。

“忽略”

var mapping = {
    'ignore': ["boardid", "boardname","listid","cardvisiblity","showlist","listremove","showRenderTimes"]
}
 ko.mapping.fromJS(data, mapping, self.lists);