我的 Angular 发生了一些奇怪的事情。
我有一个带有编辑按钮的详细信息视图。当我按下编辑按钮时，我将对象传递到编辑视图。在编辑表单上有几个下拉框。我第一次单击编辑按钮时，一切都加载良好。所有下拉菜单都选择了正确的值。当我在编辑表单上按取消时，我会返回到详细信息视图。当我什么都不做并再次按详细信息视图上的“编辑”按钮时，下拉列表根本没有选定的值！然而，下拉菜单确实有项目。
这怎么可能？我没有对数据做任何事情！
详细视图和编辑视图都是指令：
在customerDetails模板中：
<div>
Here all the details of the customer
<button ng-click="ShowCustomerEditForm()">Edit</button>
</div>
<customer-edit
visible="showCustomerForm"
customer = "customer">
</customer-edit>
指令客户编辑：
app.directive("customerEdit", function (CustomerService, CountryService) {
return {
restrict: 'E',
templateUrl: '/Customer/Add',
scope: {
customer: '=',
visible: '=',
onCustomerSaved: '&'
},
link: function (scope, element, attributes) {
CustomerService.getAllAcademicDegrees().then(function (response) {
scope.academicDegrees = response;
});
CustomerService.getAllGenders().then(function (response) {
scope.genders = response;
});
CountryService.getAllCountries().then(function (response) {
scope.countries = response;
});
scope.$watch('customer', function (newValue) {
if (newValue && newValue.Id > 0) {
scope.customer.originalCustomer = {};
angular.copy(scope.customer, scope.customer.originalCustomer);
}
});
scope.customerFormSubmit = function () {
if (scope.customer.Id > 0) {
editCustomer();
}
else {
addCustomer();
}
}
scope.hideCustomerForm = function (restoreOriginal) {
if (restoreOriginal) {
angular.copy(scope.customer.originalCustomer, scope.customer);
}
scope.visible = false;
}
// Private functions
function editCustomer() {
var editCustomer = createCustomer(scope.customer);
editCustomer.Id = scope.customer.Id;
CustomerService.editCustomer(editCustomer).then(editCustomerSucceeded);
scope.hideCustomerForm(false);
}
function editCustomerSucceeded(response) {
var uneditedCustomer = _.findWhere(scope.customers, { Id: response.Id });
angular.copy(response, uneditedCustomer);
}
function addCustomer() {
var newCustomer = createCustomer(scope.customer);
CustomerService.addCustomer(newCustomer).then(function (response) {
scope.onCustomerSaved({ customer: response });
scope.hideCustomerForm(false);
});
}
}
}
});
客户编辑html：
<div class="add-edit-container">
<div class="titleBox">
{{ customerFormData.title }}
<span class="close" title="Annuleren en sluiten" ng-click="hideCustomerForm(true)">×</span>
</div>
<div class="border">
<form id="frmAddCustomer" name="form" novalidate data-ng-submit="customerFormSubmit()">
<div>
<fieldset>
<legend>Identificatie</legend>
<label>Code:</label>
<input type="text" data-ng-model="customer.Code" />
<label>Geslacht:</label>
<label style="float: left;margin-right: 3px;" data-ng-repeat="gender in genders" data-ng-hide="$first">
<input type="radio" name="gender" data-ng-value="gender" data-ng-model="customer.Gender" />{{gender.Description}}
</label>
<div class="clear-float"/>
<label>Titel:</label>
<select data-ng-model="customer.AcademicDegree" data-ng-options="degree.Description for degree in academicDegrees"></select>
<label>Initialen:</label>
<input type="text" required data-ng-model="customer.Initials" />
<label>Voornaam: </label>
<input type="text" required data-ng-model="customer.FirstName" />
<label>Tussenvoegsel:</label>
<input type="text" data-ng-model="customer.MiddleName" />
<label>Achternaam:</label>
<input type="text" required data-ng-model="customer.LastName" />
<label>Geboortedatum:</label>
<input type="text" datepicker="01-01-1950" required data-ng-model="customer.BirthDate" />
<label>BSN:</label>
<input type="text" required data-ng-model="customer.BSNNo" />
<label>Identificatienummer:</label>
<input type="text" required data-ng-model="customer.IdCardNo" />
</fieldset>
<fieldset>
<legend>Contact</legend>
<label>Straat:</label>
<input type="text" required data-ng-model="customer.Street" />
<label>Huisnummer + toevoeging:</label>
<input type="text" required data-ng-model="customer.HouseNumber" style="width: 50px"/>
<input type="text" data-ng-model="customer.HouseNumberAddition" style="width: 50px"/>
<label>Postcode:</label>
<input type="text" required data-ng-model="customer.ZipCode" />
<label>Woonplaats:</label>
<input type="text" required data-ng-model="customer.City" />
<label>Telefoonnummer overdag:</label>
<input type="text" required data-ng-model="customer.DayPhone" />
<label>Telefoon anders:</label>
<input type="text" data-ng-model="customer.PhoneOther" />
<label>E-mailadres:</label>
<input type="email" required data-ng-model="customer.EmailAddress" />
<label>Bedrijfsnaam:</label>
<input type="text" data-ng-model="customer.CompanyName" />
<label>Land:</label>
<select data-ng-model="customer.Country" data-ng-options="country.Description for country in countries"></select>
</fieldset>
<fieldset>
<legend>Afwijkend postadres</legend>
<label>Straat:</label>
<input type="text" data-ng-model="customer.OtherStreet" placeholder="leeg indien niet van toepassing" />
<label>Huisnummer + toevoeging:</label>
<input type="text" data-ng-model="customer.OtherHouseNumber" style="width: 50px"/>
<input type="text" data-ng-model="customer.OtherHouseNumberAddition" style="width: 50px"/>
<label>Postcode:</label>
<input type="text" data-ng-model="customer.OtherZipCode" placeholder="leeg indien niet van toepassing" />
<label>Woonplaats:</label>
<input type="text" data-ng-model="customer.OtherCity" placeholder="leeg indien niet van toepassing" />
<input type="hidden" data-ng-model="customer.OtherAddressId" />
</fieldset>
</div>
<div class="button-box">
<input type="submit" value="Opslaan" class="button" />
<a href="javascript:void(0)" ng-click="hideCustomerForm(true)" class="button">Annuleren</a>
</div>
</form>
</div>
</div>
我可以回答为什么会出现这个问题。
问题是：
angular.copy(scope.customer.originalCustomer, scope.customer);
angular.copyscope.customer.Countryscope.countries的元素。因此，
select指令失去了对所选值的跟踪。