Question

我发送一个JSON对象，以便在我的页面上初始化一些输入和选择值。该对象包含ShipTo属性。我希望下拉列表中填充此初始值。由于某种原因，即使它们是同一个对象，它也不会填充。我甚至在一个轨道中添加了以确保它是基于CompanyName测试相等性（不完全确定那是什么轨道的意思）这是我所拥有的：

JSON对象：

{
    "AccountNumber": "12345",
    "Email": null,
    "CompanyName": "HK Electric",
    "Inactive": false,
    "PhoneNumbers": null,
    "ChildOfCustomer": "00000000-0000-0000-0000-000000000000",
    "Id": "a4aab309-321c-4b09-969c-073eb83b90ad",
    "ModifiedBy": null,
    "ModifiedOn": "2014-07-16T18:46:52.065Z",
    "CreatedBy": null,
    "CreatedOn": "2014-07-16T18:46:52.065Z",
    "IsDeleted": false
}

vm.shiptos：

[
    {
        "ShipTo": {
            "AccountNumber": "1234",
            "Email": null,
            "CompanyName": "Mk Mechanical",
            "Inactive": false,
            "PhoneNumbers": null,
            "ChildOfCustomer": "00000000-0000-0000-0000-000000000000",
            "Id": "b90f9b8c-3910-43ec-8c14-6294155ce855",
            "ModifiedBy": null,
            "ModifiedOn": "2014-07-15T23:03:58.47Z",
            "CreatedBy": null,
            "CreatedOn": "2014-07-15T23:03:58.47Z",
            "IsDeleted": false
        },
        "Addresses": [],
        "Customer": null,
        "Job": null,
        "Orders": []
    },
    {
        "ShipTo": {
            "AccountNumber": "12345",
            "Email": null,
            "CompanyName": "HK Electric",
            "Inactive": false,
            "PhoneNumbers": null,
            "ChildOfCustomer": "00000000-0000-0000-0000-000000000000",
            "Id": "a4aab309-321c-4b09-969c-073eb83b90ad",
            "ModifiedBy": null,
            "ModifiedOn": "2014-07-16T18:46:52.065Z",
            "CreatedBy": null,
            "CreatedOn": "2014-07-16T18:46:52.065Z",
            "IsDeleted": false
        },
        "Addresses": [],
        "Customer": null,
        "Job": null,
        "Orders": []
    }
]

我的HTML中的ngoptions语句：

<select id="ddlShipto" name="ddlShipto" data-ng-model="vm.Shipto" data-ng-options="shipto as shipto.ShipTo.CompanyName for shipto in vm.shiptos track by shipto.ShipTo.CompanyName" class="form-control FloatLeft" required>
                            <option selected="selected" value="">--Select One--</option>
                        </select>

Answer 1

不确定跟踪是不是您正在寻找的内容。

这是您正在使用的ng-options语法：select as label for value in array

您错误的部分是select参数。此参数的表达式与模型进行相等性检查以确定它是否匹配（并将自动设置所选选项等）。所以，现在你的select参数是shipto。这意味着，为了默认值，您的模型需要等于vm.shiptos中的对象。

以下是两个选项：

第一个选项是遍历vm.shiptos并将模型设置为您想要默认的模型。例如：

angular.forEach($scope.vm.shiptos,function(el,i){
  //check objects against the JSON object and set the model to the object if desired
  if (el.ShipTo.AccountNumber === jsonObject.AccountNumber){
    theModelForNgOptions = el;
  }
};

您拥有的第二个选项是将ng-options select参数更改为对象上的其他参数，以便模型不必是整个对象。如果AccountNumber是您对这些对象的唯一标识符，则可以将选项更改为：

data-ng-options="shipto.ShipTo.AccountNumber as shipto.ShipTo.CompanyName for shipto in vm.shiptos

现在，只有附加的模型等于shipto.AccountNumber时，选择才会默认。以下是工作中的一个示例jsfiddle：http://jsfiddle.net/ADukg/5392/

Angular ng-options选择未设置为初始值

1 个答案: