javascript - 将对象推送到数组并使用另一个对象作为属性

Question

我想根据数据表行创建 json 字符串。下面的源代码运行良好，但有时我没有 AddressDetails 对象，并且我不想设置它。如何向此代码添加条件(如果 selectedRow.DeliveryAddressDetails=null 未设置 DeliveryAddressDetails )

var returnItems=[];
                data.each(function() {
                    var rowIndex = $dataTable.fnGetPosition(this);
                    var selectedRow = $dataTable.fnGetData(rowIndex);
                    returnItems.push(
                        {
                            DeliveryAddress: selectedRow.DeliveryAddress,
                            Extension: selectedRow.Extension,
                            IsCourier: selectedRow.IsCourier,
                            Quantity: selectedRow.Quantity,
                            DeliveryAddressDetails: {
                                AddressDestinationDescription: selectedRow.DeliveryAddressDetails.AddressDestinationDescription,
                                AddressDestinationDetailId: selectedRow.DeliveryAddressDetails.AddressDestinationDetailId,
                                AddressDestinationName: selectedRow.DeliveryAddressDetails.AddressDestinationName,
                                AddressLine1: selectedRow.DeliveryAddressDetails.AddressLine1,
                                AddressLine2: selectedRow.DeliveryAddressDetails.AddressLine2,
                                AddressLine3: selectedRow.DeliveryAddressDetails.AddressLine3,
                                CityName: selectedRow.DeliveryAddressDetails.CityName,
                                PhoneNumber: selectedRow.DeliveryAddressDetails.PhoneNumber,
                                ZipCode: selectedRow.DeliveryAddressDetails.ZipCode
                            }
                        });
                });
        $("#myJson").val(JSON.stringify(returnItems));

感谢帮助

Answer 1

您必须先创建对象，然后有条件地添加该属性

var returnItems = [];
data.each(function() {
    var rowIndex = $dataTable.fnGetPosition(this);
    var selectedRow = $dataTable.fnGetData(rowIndex);
    var obj = {
        DeliveryAddress: selectedRow.DeliveryAddress,
        Extension: selectedRow.Extension,
        IsCourier: selectedRow.IsCourier,
        Quantity: selectedRow.Quantity
    }
    if ( DeliveryAddressDetails !== null ) { // or typeof ** == "object"
        obj.DeliveryAddressDetails = {
            AddressDestinationDescription: selectedRow.DeliveryAddressDetails.AddressDestinationDescription,
            AddressDestinationDetailId: selectedRow.DeliveryAddressDetails.AddressDestinationDetailId,
            AddressDestinationName: selectedRow.DeliveryAddressDetails.AddressDestinationName,
            AddressLine1: selectedRow.DeliveryAddressDetails.AddressLine1,
            AddressLine2: selectedRow.DeliveryAddressDetails.AddressLine2,
            AddressLine3: selectedRow.DeliveryAddressDetails.AddressLine3,
            CityName: selectedRow.DeliveryAddressDetails.CityName,
            PhoneNumber: selectedRow.DeliveryAddressDetails.PhoneNumber,
            ZipCode: selectedRow.DeliveryAddressDetails.ZipCode
        }
    }
    returnItems.push();
});

$("#myJson").val(JSON.stringify(returnItems));