Validate form using angularjs before ajax request

Question

I have a simple form like this. I am submitting this form via ajax using angularjs. I want to validate this form before sending ajax request and need to show the error to user. I am a newbie to angular. Please Help me

Here is my code.

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-route.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-messages.js"></script>
<div ng-app="Myapp">
    <div ng-controller="orderFormController">

        Item :   <input type="text" name="item"  ng-model='item' required> <p></p>
     Rate:   <input type="text" name="rate"  ng-model='rate' required> <p></p>

        <button type="button"  ng-click='saveorder()' >SAVE ORDER</button>
    </div>    
    <script>
        var Myapp = angular.module('Myapp', ["ngRoute"]);
        Myapp.controller('orderFormController', ['$scope', '$http', function ($scope, $http) {


            $scope.saveorder = function () {

                 // Validate form here and set the error in form

                 $http.post("order/save/", data).success(function (res, status, headers, config) {
                     $scope.message = res;

                }).error(function (data, status) { 
                    $scope.message = res;
                });
            }

        }]);
    </script>

Alexandr Lazarev · Accepted Answer · 2015-11-19 07:25:13Z

The very simple implementation could be done in a few steps:

Use <form> tag with a name attribute. Use saveorder in ng-submit attribute.
Create errors containers, and make their visibility to depend on errors: <span class="error" ng-show="form.item.$error.required">

Final result should look like:

<div ng-controller="orderFormController">    
    <form name="form" ng-submit="saveorder()">
        Item :   <input type="text" name="item"  ng-model='item' required> <p></p>
        <span class="error" ng-show="form.item.$error.required"> Item field is required!</span>
        Rate:   <input type="text" name="rate"  ng-model='rate' required> <p></p>    
        <span class="error" ng-show="form.rate.$error.required"> Rate field is required!</span>
        <button type="button">SAVE ORDER</button>
    </form>    
</div>

You can read Angular native documentation about form validation. More details are provided there.

Zohaib Ijaz · Accepted Answer · 2015-11-19 06:38:32Z

0

Read this article.. https://scotch.io/tutorials/angularjs-form-validation

It explained it really well and and if still there are confusions , ask about those after putting some effort.

answered Nov 19, 2015 at 6:38

Zohaib Ijaz

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Comments

Shailendra Sharma · Accepted Answer · 2015-11-19 07:37:38Z

you should use angular form validation for that or for custom validation use

   var Myapp = angular.module('Myapp', ["ngRoute"]);
   Myapp.controller('orderFormController', ['$scope', '$http', function($scope, $http) {
   $scope.formdata = {};

   $scope.saveorder = function(formdata) {
       $scope.error = '';

       // Validate form here and set the error in form
       if (angular.isUndefined(formdata.item) == true || angular.isUndefined(formdata.rate) == true) {
           $scope.error = "Both Item and Rate are required."
           return false;
       } else {
           $scope.error = '';
       }
       $http.post("order/save/", formdata).success(function(res, status, headers, config) {
           $scope.message = res;

       }).error(function(status, res) {
           $scope.message = res;
       });
   }

   }]);

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-route.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-messages.js"></script>
<div ng-app="Myapp">
    <div ng-controller="orderFormController">
<span style="color:red">{{error}}</span><br>
        
        Item :   <input type="text" name="item"  ng-model='formdata.item' required> <p></p>
     Rate:   <input type="text" name="rate"  ng-model='formdata.rate' required> <p></p>

        <button type="button"  ng-click='saveorder(formdata)' >SAVE ORDER</button>
    </div>

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