[英]How to display validation errors for array form fields in AngularJS?
我創建了一個動態表單,其中重復的字段作為數組提交。 但是,我想分別驗證每個字段並在其旁邊顯示錯誤消息。 如果我只有一行,則可以正常工作,但是一旦添加第二行,第一行就會停止顯示錯誤。
<form name='user' id='user' novalidate>
<div ng-repeat="bonus in bonuses">
<input name='codes[]' ng-model="bonus.code" lower-than="{{bonus.end_code}}" />
<input name='end_codes[]' ng-model="bonus.end_code" />
<span class="text-error" ng-show="user['codes[]'].$error.lowerThan">
Code must be less than End Code.
</span>
</div>
</form>
AngularJS
var app = angular.module('newBonus', []);
app.controller('NewBonusController', function($scope) {
$scope.bonuses = [];
$scope.addFields = function () {
$scope.bonuses.push({code:'', end_code: ''});
}
$scope.submit = function(){
console.log($scope.bonuses);
}
});
// Validate that one field is less or equal than other.
app.directive('lowerThan', [
function() {
var link = function($scope, $element, $attrs, ctrl) {
var validate = function(viewValue) {
var comparisonModel = $attrs.lowerThan;
if(!viewValue || !comparisonModel){
// It's valid because we have nothing to compare against
ctrl.$setValidity('lowerThan', true);
}
// It's valid if model is lower than the model we're comparing against
ctrl.$setValidity('lowerThan', viewValue <= comparisonModel );
return viewValue;
};
ctrl.$parsers.unshift(validate);
ctrl.$formatters.push(validate);
$attrs.$observe('lowerThan', function(comparisonModel){
return validate(ctrl.$viewValue);
});
};
return {
require: 'ngModel',
link: link
};
}
]);
朋克: http ://plnkr.co/edit/Fyqmg2AlQLciAiQn1gxY
我可以滿足於在每個字段旁邊都沒有它,只要對其他字段集所做的更改確實觸發了錯誤消息,在這種情況下,我可以將其彈出到頂部。 我看到的主要問題是,因為它們是數組codes[]
,它們最終傳遞到表單,所以它們將無法正常工作。
表單驗證時已正確禁用了“提交”按鈕,因此我不確定為什么消息僅鎖定到添加的最后一行。
使用子窗體來分隔范圍。
<ng-form name="frmChild">
<input name='codes' ng-model="bonus.code" lower-than="{{bonus.end_code}}" />
<input name='end_codes' ng-model="bonus.end_code" />
<span class="text-error" ng-show="frmChild.codes.$error.lowerThan">
Code must be less than End Code.
</span>
</ng-form>
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