CODEWITHSUNDEEP
angularjs
Gautam Kumar
Gautam Kumar

Reputation: 983

Form validation on ng-click angularjs

I am unable to find a solution in the existing answers, hence i am posting this.

I have a form which has many input fields, many of them are required.

There are buttons (more than 2) in the form and are tied to functions in controllers using ng-click.

I need to have form validated on ng-click before the function is executed.

By default, form validation is happening after function execution. Function should not run if required fields are not filled.

I have created a fiddle. https://jsfiddle.net/z1uyyqg9/

<script>
    var app = angular.module('myApp', []);
    app.controller('myCtrl', function($scope) {
        $scope.name=undefined;
        $scope.preview = function(){
            alert("Previewed");
        };
        $scope.update = function(){
            alert("Updated");
        }
    });
</script>

<div ng-app="myApp" ng-controller="myCtrl">

    <form>
        <input type="text" ng-model='name' required>
        <button ng-click='preview()'>Preview</button>
        <button ng-click='update()'>Update</button>
    </form>

</div>

Upvotes: 26

Views: 80137

Answers (2)

jme11
jme11

Reputation: 17397

You could set a flag so that you can show some kind of a required message or set some css class when the form is invalid.

var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
    $scope.name=undefined;
    $scope.showMsgs = false;
    $scope.preview = function(form){
        if ($scope[form].$valid) {
            alert("Previewed");
        } else {
            $scope.showMsgs = true;
        }
    };
    $scope.update = function(form){
        if ($scope[form].$valid) {
            alert("Updated");
        } else {
            $scope.showMsgs = true;
        }    
    };
});
.error {
  border-color: red;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="myApp" ng-controller="myCtrl">

    <form name="myform" novalidate ng-init="disabled=false">
        <p ng-show="showMsgs && myform.name.$error.required">This field is required</p>
        <input type="text" name="name" ng-model='name' ng-required="!disabled" ng-disabled="disabled" ng-class="{error: showMsgs && myform.name.$error.required}" />
        
        <button ng-click="preview('myform')">Preview</button>
        <button ng-click="update('myform')">Update</button>
        <button ng-click="disabled=!disabled">toggle disabled</button>
    </form>

</div>

Upvotes: 4

Nikos Paraskevopoulos
Nikos Paraskevopoulos

Reputation: 40308

A very-very simple solution is to give the form a name so you can refer to it and then tweak the ng-click to fire only if the form is valid:

<form name="myform">
    <input type="text" ng-model='name' ng-required="true" />
    <button ng-click="myform.$valid && preview()">Preview</button>
    <button ng-click="myform.$valid && update()">Update</button>
</form>

Forked fiddle: https://jsfiddle.net/r8d1uq0L/

I like separating validation (a business concern) from the view, to that end I created egkyron that lets you define the model constraints in code and use programmatic validation along with standard Angular form validation.

Upvotes: 66

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