如何为AngularJS表单验证要求至少一个带有清单模型的复选框？

Question

我有一个带有2个日期输入和一个清单的小表单,这些都是复选框.我无法弄清楚如何在列表中要求任何一个复选框进行表单验证.如果我为复选框添加了ng-required,则会为所有复选框重复该操作.任何人都可以知道如何要求复选框作为必需的表单元素.但我不想选择所有元素来使表格有效.因此,如果只有一个作为复选框的表单字段被选中,则表单必须有效,否则无效.

angular.module('frmApp', [
    'ui.bootstrap', 'angularMoment'
  ])
  .controller('Frm Controller', [
    '$scope',
    function($scope) {

      $scope.invDets = $stateParams.details;
      $scope.allowanceObj = {};
      $scope.finCompWithLogo = [];

      $scope.validUntil = new Date();
      $scope.recentDate = new Date();

      // Disable weekend selection
      $scope.disabled = function(date, mode) {
        return (mode === 'day' && (date.getDay() === 0 || date.getDay() === 6));
      };
      $scope.openedPayment = false;
      $scope.openedAllowance = false;
      $scope.openPayment = function($event, elementOpened) {
      	$scope.paymentDueDate = new Date();
        /*$scope.openedPayment = !$scope.openedPayment;*/
        $event.preventDefault();
        $event.stopPropagation();

        $scope[elementOpened] = !$scope[elementOpened];
      };
      $scope.openAllowance = function($event, elementOpened) {
     		$scope.allowanceDueDate = new Date();
        /*$scope.openedAllowance = !$scope.openedAllowance;*/
        $event.preventDefault();
        $event.stopPropagation();

        $scope[elementOpened] = !$scope[elementOpened];
      };

      $scope.dateOptions = {
        'year-format': "'yy'",
        'starting-day': 1,
        'minDate': new Date()
      };
      $scope.doSomething = function (frm) {
$http.post('/someUrl', frm, config).then(successCallback, errorCallback);      alert('Done something!!');
      }
    }
  ]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.1/css/font-awesome.min.css" rel="stylesheet"/>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<div>
  <form name="frm1" novalidate>
    <div class="row">
      <div class="allowance-required-field">
        <div class="box">
          <div class="icon"> <i class="fa fa-calendar"></i> </div>
          <div class="field-title">Payment</div>
          <div class="input-group">
            <input type="text" class="form-control" uib-datepicker-popup="dd-MM-yyyy" ng-click="openPayment($event, 'openedPayment')" ng-model="frm1.PaymentDueDate" show-weeks="false" is-open="openedPayment" datepicker-options="dateOptions" ng-required="true"
            />
            <span class="input-group-btn">
                            <button class="btn btn-default" ng-click="openPayment($event, 'openedPayment')"><i class="fa fa-calendar"></i></button>
                        </span>
          </div>

        </div>
      </div>
      <div class="allowance-required-field">
        <div class="box">
          <div class="icon"> <i class="fa fa-calendar"></i> </div>
          <div class="field-title">Delay</div>
          <div class="input-group">
            <input type="text" class="form-control" uib-datepicker-popup="dd-MM-yyyy" ng-click="openAllowance($event, 'openedAllowance')" ng-model="frm1.AllowanceDueDate" show-weeks="false" is-open="openedAllowance" min-date="recentDate" max-date="frm1.PaymentDueDate"
            datepicker-options="dateOptions" ng-required="true" />
            <span class="input-group-btn">
                            <button class="btn btn-default" ng-click="openAllowance($event, 'openedAllowance')"><i class="fa fa-calendar"></i></button>
                        </span>
          </div>

        </div>
      </div>

      <div class="pick-factoring-companies">
        <div class="box">
          <h2 class="text-center"> Choose One or More </h2>
          
          <div class="text-center">
            <a href="" ng-click="checkAll()" class="btn btn-sm btn-default">Select All</a>
            <a href="" ng-click="uncheckAll()" class="btn btn-sm btn-default">Deselect All</a>
          </div>
          <ul ng-required="true">
            <li ng-repeat="cmp in finCompWithLogo">
              <div ng-if="cmp" class="finance-company">

                <input id="{{'company-'+$index}}" type="checkbox" class="pick-faktoring" checklist-model="frm1.AllowanceCompanies" checklist-value="cmp.Identifier" ng-change="addCompany(cmp.Identifier)">
                <label for="{{'company-'+$index}}">
                  <div class="img"> <img data-toggle="tooltip" data-placement="bottom" src="data:image/{{cmp.Logo[0].Type}};base64,{{cmp.Logo[0].Data}}" title="{{cmp.CompanyName}}"> </div>
                  <div class="title"> {{cmp.CompanyName}} </div>
                </label>
              </div>
            </li>
          </ul>
        </div>
      </div>
    </div>
    <div class="text-center">
      <a href="" ng-click="doSomething(frm1)" ng-disabled="frm1.$invalid" class="btn btn-lg btn-success">Send</a>
    </div>
  </form>

  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>

</div>

Answer 1

如果列表为空,则将复选框标记为ng-required.

<label ng-repeat="role in roles">
  <input ng-required="user.roles.length == 0" 
    type="checkbox" 
    checklist-model="user.roles" 
    checklist-value="role.id"> 
  {{role.text}}
</label>