Question

我希望将供应商列表嵌入到我从服务器获得的现有JSON Payload中，具体取决于JSON Payload中的项目是否需要供应商。

我最终想要的是这样的事情：

    {
        "ProductName": "Product123",
        "RequiredComponents": "CAP 10% H/Vol",
        "StockCode": "142111411",
        "RequiredQtyByBom": 4,
        "QtyUnassignedInWarehouse": 0,
        "QtyAllocatedInWarehouse": 40,
        "PCBReference": "442C",
        "QtyOnOrder": 26,
        "Vendors": [],
        "RequireVendor": false
    },
    {
        "ProductName": "Product123",
        "RequiredComponents": "Screws",
        "StockCode": "Screws",
        "RequiredQtyByBom": 1,
        "QtyUnassignedInWarehouse": 0,
        "QtyAllocatedInWarehouse": 14,
        "PCBReference": "Screws",
        "QtyOnOrder": 26,
        "Vendors": [
                      {"VendorID": "3", 
                      "VendorName": "ABC Supplier",
                      "VendorMOQ": 50000,
                      "VendorItemPrice": 322},
                      {"VendorID": "4", 
                      "VendorName": "DEF Supplier",
                      "VendorMOQ": 4,
                      "VendorItemPrice": 120}
                   ],
        "RequireVendor": true
    },
    {
        "ProductName": "Product123",
        "RequiredComponents": "14141415",
        "StockCode": "151555231",
        "RequiredQtyByBom": 1,
        "QtyUnassignedInWarehouse": 0,
        "QtyAllocatedInWarehouse": 170,
        "PCBReference": "1414",
        "QtyOnOrder": 26,
        "Vendors": [],
        "RequireVendor": false
    }

我正在考虑用2个AJAX调用来执行此操作，将值推入Observable数组。

AJAX致电1：创建产品的初始有效负载

 MyDataViewModel.SelectedOrderID.subscribe = ko.computed(function () {
        $.ajax({
            url: "/URLToMethod/GetBomStockByProductID",
            data: { OrderID: ko.toJS(MyDataViewModel.SelectedOrderID) },
            type: "GET",
            contentType: "application/json; charset=utf-8",
            dataType: "JSON",
            timeout: 10000,
            success: function (Result) {
                for (var i = 0; i < Result.d.length; i++) {
                    element = Result.d[i];
                    MyDataViewModel.CheckStock.push({
                        ProductName: element.ProductName, RequiredComponents: element.RequiredComponents, StockCode: element.StockCode, RequiredQtyByBom: element.RequiredQtyByBom, QtyUnassignedInWarehouse: element.QtyUnassignedInWarehouse, QtyAllocatedInWarehouse: element.QtyAllocatedInWarehouse, PCBReference: element.PCBReference, QtyOnOrder: element.QtyOnOrder, Vendors: ko.observableArray(), RequireVendor: ko.computed(function () {
                            if ((element.RequiredQtyByBom * element.QtyOnOrder) > element.QtyAllocatedInWarehouse) {
                                return true
                            } else {
                                return false
                            }
                        })
                    }
                    );
                }
            },
            error: function (xhr, status) {
                alert(status + " - " + xhr.responseText);
            }
        });
    });

AJAX调用2：将值推送到供应商ko.observableArray（）在第一个有效负载中创建

 MyDataViewModel.PurchaseReqHasVendorDetails = ko.computed(function () {
        var self = MyDataViewModel;
        for (var i = 0; i < self.CheckStock().length; i++) {
            if (self.CheckStock()[i].RequirePO()) {
                $.ajax({
                    url: "/URLToMethod/GetVendorsByProductName",
                    data: { ProductName: self.CheckStock()[i].ProductName },
                    type: "GET",
                    contentType: "application/json; charset=utf-8",
                    dataType: "JSON",
                    timeout: 10000,
                    success: function (Result) {
                        for (var i = 0; i < Result.d.length; i++) {
                            element = Result.d[i];
                            self.CheckStock()[i].Vendors.push({ VendorID: element.VendorID, VendorName: element.VendorName, VendorMOQ: element.VendorMOQ, VendorPrice: element.VendorPrice });
                        }
                    },
                    error: function (xhr, status) {
                        alert(status + " - " + xhr.responseText);
                    }
                });
                return true;
            } else {
                return false;
            }
        }
    });

但这不起作用。它创建了初始有效负载，但它没有获得第二个有效负载并将其推入我创建的observableArray。

非常感谢任何建议

Answer 1

您可以使用mapping plugin轻松完成此操作。假设你从服务器中检索一个稍微不同的JS（或者在收到它之后稍微修改它），如下所示：

var data = {
    [ /* Your example data with products and nested vendors here */ ]
}

创建视图模型可以简单如下：

var viewModel = ko.mapping.fromJS(data);
ko.applyBindings(viewModel);

如果您不想使用自动生成的视图模型但使用自己的ViewModel构造函数，则可以使用映射插件添加其他“映射选项”。文档中有很好的例子。

这是包含您数据的fiddle with a demo。

将值推入嵌套的ko.observableArray

1 个答案: