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AngularJS Server-side validation directive
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| /* | |
| * Let’s assume that the server returns validation errors using | |
| * the following format: | |
| * | |
| * [{ | |
| * "field": "code", | |
| * "type": "unique", | |
| * "value": 123, | |
| * "message": "this field is unique" | |
| * }] | |
| * | |
| */ | |
| import ServerValidationController from './server-validation.controller'; | |
| const serverValidationComponent = { | |
| require: { | |
| form: '^form' | |
| }, | |
| template: '', | |
| controller: ServerValidationController, | |
| controllerAs: 'vm', | |
| bindings: { | |
| errors: '<' | |
| } | |
| } | |
| export default angular.module('server-validation', []) | |
| .component('server-validate', serverValidationComponent) | |
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| export default class ServerValidationController { | |
| constructor($scope) { | |
| 'ngInject'; | |
| $scope.$watch(() => this.errors, errors => this.mapErrorsToFields(errors) ) | |
| } | |
| invalidateField (field, errorType) { | |
| const changeListener = () => { | |
| field.$setValidity(errorType, true); | |
| let index = field.$viewChangeListeners.indexOf(changeListener); | |
| if (index > -1) { | |
| field.$viewChangeListeners.splice(index, 1); | |
| } | |
| } | |
| field.$setDirty(); | |
| field.$setValidity(errorType, false); | |
| field.$viewChangeListeners.push(changeListener); | |
| } | |
| mapErrorsToFields (errors = []) { | |
| errors.map(error => { | |
| this.invalidateField(this.form[error.field], `server.${error.type.toLowerCase()}`) | |
| }) | |
| } | |
| } |
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| <form name="form" ng-submit="create()"> | |
| <server-validate errors="errorsFromServer"></server-validate> | |
| <div class="form-group"> | |
| <input type="text" ng-model="model.code" required name="code" /> | |
| <div class="help-block" ng-messages="form.code.$error"> | |
| <div ng-message="required">This field is required</div> | |
| <div ng-message="server.unique">This field must be unique</div> | |
| </div> | |
| </div> | |
| <div class="form-group"> | |
| <button type="submit" class="btn btn-success" ng-disabled="form.$pristine || form.$invalid"> | |
| Send | |
| </button> | |
| </div> | |
| </form> |
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