Question

所以，在我使用淘汰赛的第一周，我想我已经有了一个很好的原型：（修剪并删除ajaxy调用）

http://jsfiddle.net/NelsonLamprecht/39dfx/

"use strict";

var steeringTeamSheetViewModel = function (serviceUrl) {
var self = this;
self.viewModel = ko.mapping.fromJS([]);

self.InitializeAjax = function () {
    //abbreviated  
};

self.GetData = function () {
    //abbreviated
    var data = {
        "Sections": [{
            "ProjectType": "BUSINESS EXPANSION",
                "Projects": [{
                "ID": "767a46a2-ddba-435c-a9f9-fdb9f0175337",
                    "ItemOrder": 0,
                    "ProjectName": "project abc"
            }, {
                "ID": "0e36d7da-92e6-4f1b-939d-936d6e759115",
                    "ItemOrder": 0,
                    "ProjectName": "project abc"
            }, {
                "ID": "f6e447d4-955d-48e0-bcdf-6db9044b7a89",
                    "ItemOrder": 0,
                    "ProjectName": "project a"
            }]
        }, {
            "ProjectType": "OPER & MAINT - EFFICIENCY",
                "Projects": [{
                "ID": "9883a3c8-d01e-4fc9-8f66-9b46d720afde",
                    "ItemOrder": 0,
                    "ProjectName": "project q"
            }]
        }, {
            "ProjectType": "OTHER",
                "Projects": [{
                "ID": "f1ccfa79-c5b1-4880-b5a1-1c2350e709e1",
                    "ItemOrder": 0,
                    "ProjectName": "project 1"
            }]
        }]
    };
    self.ProcessRetrievedData(data);
};

self.ProcessRetrievedData = function (retrievedData) {
    self.viewModel(retrievedData);
};   

self.GetData();
};
var steeringTeamSheetService = 'someurl';
var sts = new steeringTeamSheetViewModel(steeringTeamSheetService);
ko.applyBindings(sts);

我现在要做的是将ko.oberservableArray更改为另一个绑定，例如 .indexed（）一个漂浮在那里。

http://jsfiddle.net/NelsonLamprecht/39dfx/19/

"use strict";

var steeringTeamSheetViewModel = function (serviceUrl) {
var self = this;
var mapping = {
'sections': {
    create: function(options) {
        alert(options);
    }
}
}
self.viewModel = ko.mapping.fromJS([],mapping);

self.InitializeAjax = function () {
    //abbreviated  
};

self.GetData = function () {
    //abbreviated
    var data = {
        "Sections": [{
            "ProjectType": "BUSINESS EXPANSION",
                "Projects": [{
                "ID": "767a46a2-ddba-435c-a9f9-fdb9f0175337",
                    "ItemOrder": 0,
                    "ProjectName": "project abc"
            }, {
                "ID": "0e36d7da-92e6-4f1b-939d-936d6e759115",
                    "ItemOrder": 0,
                    "ProjectName": "project abc"
            }, {
                "ID": "f6e447d4-955d-48e0-bcdf-6db9044b7a89",
                    "ItemOrder": 0,
                    "ProjectName": "project a"
            }]
        }, {
            "ProjectType": "OPER & MAINT - EFFICIENCY",
                "Projects": [{
                "ID": "9883a3c8-d01e-4fc9-8f66-9b46d720afde",
                    "ItemOrder": 0,
                    "ProjectName": "project q"
            }]
        }, {
            "ProjectType": "OTHER",
                "Projects": [{
                "ID": "f1ccfa79-c5b1-4880-b5a1-1c2350e709e1",
                    "ItemOrder": 0,
                    "ProjectName": "project 1"
            }]
        }]
    };
    self.ProcessRetrievedData(data);
};

self.ProcessRetrievedData = function (retrievedData) {
    self.viewModel(retrievedData);
    //I think I should be using something like
    //self.viewModel = ko.mapping.fromJSON(retrievedData,mapping,{});
};   

self.GetData();
};
var steeringTeamSheetService = 'someurl';
var sts = new steeringTeamSheetViewModel(steeringTeamSheetService);
ko.applyBindings(sts);

但是，如果没有这一切，我认为我在设置模型和从Web服务（c＃）获取数据时遵循正确的模式。

有人可以验证我这样做是否正确以及如何帮助创建模式？

Answer 1

据我了解您的问题，您尝试通过ajax下载数据并将其存储在steeringTeamSheetViewModel的属性“viewModel”中。你的方式对我来说没问题。

您不应该覆盖self.viewModel。因为如果ko.applyBindings已经运行到那一点，你将破坏绑定。

self.ProcessRetrievedData = function (retrievedData) {
    // map the data from the viewModel and update self.viewModel
    self.viewModel(ko.mapping.fromJSON(retrievedData,mapping,{}));
};

请记住，如果您拥有大型视图模型，ko.mapping将变得非常慢。

KnockoutJS 2.0映射并修改映射对象

1 个答案: