自訂錯誤驗證

整體判斷 : if (!$scope.form1.$valid)
單獨判斷 : if (!$scope.form1.$error.requirepaycode)

強制判斷 : $scope.form1.報件單號.$validate(); (考慮有些情況不會自動觸發函數)

.directive("requirepaycode", function () {
            return {
                restrict: 'A',
                require: "ngModel",
                link: function (scope, element, attributes, ngModel) {
                    ngModel.$validators.requirepaycode = function (modelValue, viewValue) {
                        return !scope.selectingPayCode() || (modelValue != null && modelValue != "");
                    }                    
                }
            };
        })

<input requirepaycode name="報件單號" entertab ui-mask="X999999999999" model-view-value="true" class='form-control' ng-focus="focusPayCode()" ng-disabled="!newmode && !editmode" ng-model='selectData["報件單號"]'><span style='color:red' ng-show="form1['報件單號'].$error.requirepaycode">*</span>