Question

我正在尝试加载一个表单，我可以从数据库中更新现有数据。 My Object在每个元素内部有一个嵌套数组，该数组中也有一个嵌套数组。它看起来像以下

{
    "Id": 13,
    "Name": "Category 1",
    "DeliveryOptions":
    [
        {
            "Id": 15,
            "DeliveryCategoryId": 13,
            "Name": "Option 1.-1",
            "DeliveryBreakPoints":
            [
                {
                    "Id": 19,
                    "DeliveryOptionId": 15,
                    "Start": 0,
                    "End": 10,
                    "Flat": 1,
                    "Variable": 2,
                    "Delete": false
                }
            ]
        },
        {
            "Id": 16,
            "DeliveryCategoryId": 13,
            "Name": "Option1-2",
            "DeliveryBreakPoints":
            [
                {
                    "Id": 20,
                    "DeliveryOptionId": 16,
                    "Start": 0,
                    "End": null,
                    "Flat": 1,
                    "Variable": 3,
                    "Delete": false
                }
            ]
        }
    ]
}

您可以在对象内部看到一个名为“DeliveryOptions”的数组，每个“DeliveryOptions”数组都有另一个名为“DeliveryBreakPoints”的数组

我已将knockout js模型配置为以下

    function DeliveryCategory(id, name, options) {
        this.Id = id;
        this.Name = name;
        this.DeliveryOptions = ko.observableArray(options);
    }

    function DeliveryOption(id, name, breakpoint) {
        bpIdCounter = 0;
        this.Id = id;
        this.Name = name;
        this.DeliveryBreakPoints = ko.observableArray(breakpoint);

        this.addDeliveryBreakPoint = function (option) {
            option.DeliveryBreakPoints.push(new DeliveryBreakPoint(bpIdCounter++));
        }
    }

    function DeliveryBreakPoint(id, start, end, flat, variable) {
        var self = this;
        self.Id = id;
        self.Start = start;
        self.End = end;
        self.Flat = flat;
        self.Variable = variable;
    }

我正在传递参数（例如id和name ...），因为此代码也用于创建新对象。但是我不确定这是否阻止它将现有模型绑定。我还创建了一个看起来像这样的视图模型

function DeliveryCategoryViewModel(model) {
    var self = this;
    if (model.Id > 0) {
        self.DeliveryCategory = ko.observable(model);
    } else {
        self.DeliveryCategory = ko.observable(new DeliveryCategory(null, "", [new DeliveryOption(null, "")]));
    }

    self.addDeliveryOption = function () {
        self.DeliveryCategory().DeliveryOptions.push(new DeliveryOption(null, "", [new DeliveryBreakPoint(null,"0","","","","")]));
    }

    self.removeDeliveryOption = function (option) {
        self.DeliveryCategory().DeliveryOptions.remove(option);
    }

    self.removeDeliveryBreakPoint = function (option, breakPoint) {
        option.DeliveryBreakPoints.remove(breakPoint);
    }

    self.onSubmit = function () {

        $.ajax({
            url: "CreateDeliveryCategory",
            type: "POST",
            data: ko.toJSON(self),
            async: true,
            contentType: "application/json"
        }).success(function (data) {
            window.location = data;
        }).error(function(error){
            alert(error);
        })


    }

}

当我从头开始创建一个新的交付类别时，也可以使用此代码。这就是检查“model.Id＆gt; 0”的原因。如果model.id＆gt;它不绑定模型。它只显示交付类别名称和第一个交付选项名称（即使有两个交付选项），其余的只是打破。

任何人都可以查明发生了什么事吗？

使用knockout js加载嵌套的JSON数组

0 个答案: