Question

我正在尝试验证一组复选框，其中至少需要一个。这是我的复选框的HTML：

<fieldset class="requiredcheckboxgroup">
    <legend>How did you come into contact with VK?*</legend>
    <input ng-model="application.contact.relations" group-required required type="checkbox" name="appcontact" value="relations" id="app-contact-relations" />relations<br>
    <input ng-model="application.contact.employees" group-required required type="checkbox" name="appcontact" value="employees" id="app-contact-employees" contact-employees />employees<br>
        <input ng-model="application.contact.employeesWho" type="text" placeholder="Who?" name="appcontact-employeeswho" id="app-contact-employees-who" disabled />
    <input ng-model="application.contact.jobad" group-required required type="checkbox" name="appcontact" value="jobad" id="app-contact-jobad" />jobad<br>
    <input ng-model="application.contact.website" group-required required type="checkbox" name="appcontact" value="website" id="app-contact-website" />website<br>
    <input ng-model="application.contact.other" group-required required type="checkbox" name="appcontact" value="other" id="app-contact-other" />other<br>
</fieldset>

正如您所看到的，我的所有复选框都包含必需属性和 group-required属性。我有这样的指示：

angular.module('dxs-vkgroupApp').directive('groupRequired', group_required);

function group_required() {
    return  {
        restrict: 'A',
        link: function(scope, element, attr) {
            var requiredCheckboxes = jQuery('.requiredcheckboxgroup :checkbox[required]');

            requiredCheckboxes.change(function(){
                if(requiredCheckboxes.is(':checked')) {
                    requiredCheckboxes.removeAttr('required');
                }

                else {
                    requiredCheckboxes.attr('required', 'required');
                }
            });
        }
    };
}

问题是在表格有效之前，他们都必须被选中 ....选择一个时，正确删除了必需属性，但是当我尝试提交表单时，他仍然无效。

我该如何解决这个问题？或者有更好的方法来解决这个问题吗？

Answer 1

您可以尝试创建一个确定是否已选中任何复选框的功能：

 angular('module').controller('MyController', function(){
    this.application = { contact: {} };

    this.noneSelected = function () {
      return !(application.contact.relations || application.contact.employees) /* ... */; 
    }
}

然后在你的HTML上：

<div ng-controller="MyController as ctrl">
<fieldset class="requiredcheckboxgroup">
    <legend>How did you come into contact with VK?*</legend>
    <input ng-model="ctrl.application.contact.relations" ng-required="ctrl.noneSelected()" type="checkbox" name="appcontact" value="relations" id="app-contact-relations" />relations<br>
    <input ng-model="ctrl.application.contact.employees" ng-required="ctrl.noneSelected()" type="checkbox" name="appcontact" value="employees" id="app-contact-employees" contact-employees />employees<br>
        <!-- .... -->
</fieldset>
</div>

Answer 2

该指令应绑定change事件。这是应该如何

<fieldset class="requiredcheckboxgroup">
    <legend>How did you come into contact with VK?*</legend>
    <input ng-model="application.contact.relations" ng-required="selected" group-required type="checkbox" name="appcontact" value="relations" id="app-contact-relations" />relations
    <br>
    <input ng-model="application.contact.employees" ng-required="selected" group-required type="checkbox" name="appcontact" value="employees" id="app-contact-employees" contact-employees />employees
    <br>
    <input ng-model="application.contact.employeesWho" type="text" placeholder="Who?" name="appcontact-employeeswho" id="app-contact-employees-who" disabled />
    <input ng-model="application.contact.jobad" ng-required="selected" group-required type="checkbox" name="appcontact" value="jobad" id="app-contact-jobad" />jobad
    <br>
    <input ng-model="application.contact.website" ng-required="selected" group-required type="checkbox" name="appcontact" value="website" id="app-contact-website" />website
    <br>
    <input ng-model="application.contact.other" ng-required="selected" group-required type="checkbox" name="appcontact" value="other" id="app-contact-other" />other
    <br>
</fieldset>

指令应为

var app = angular.module('dxs-vkgroupApp', []);

app.controller('testCtrl', ['$scope', function($scope) {

        $scope.selected = true;

    }]);

    app.directive('groupRequired', group_required);

    function group_required() {
        return  {
            restrict: 'A',
            link: function(scope, element, attr) {                    
                element.bind("change", function(){
                    var requiredCheckboxes = jQuery('.requiredcheckboxgroup input:checked').length;                        
                    if(requiredCheckboxes > 0)
                        scope.selected = false;
                    else
                        scope.selected = true;
                    scope.$apply();
                })
            }
        };
    }

必填复选框组

2 个答案: