How To Display Server Errors In Angularjs With Ng Messages

In AngularJS, dealing with server errors and displaying them elegantly to users can greatly enhance the user experience of your web application. Thankfully, AngularJS provides a handy module called "ngMessages" which makes handling and showing these errors a breeze. In this article, we will walk you through the steps on how to display server errors in AngularJS using ngMessages.

First things first, make sure you have included the ngMessages module in your AngularJS application. You can do this by adding it as a dependency in your main AngularJS module, like so:

var myApp = angular.module('myApp', ['ngMessages']);

With ngMessages set up, you can now start using it to display server errors. In your HTML templates, you can create a container to show the error messages. Here is an example of how you can set this up:

<div>
    <div>Server Error: {{ myForm.errorMessage }}</div>
</div>

In this snippet, we are using the ng-messages directive to display error messages based on the errors present in the "myForm" form. The ngMessage directive is set to "serverError," which will be the key we use for server-side errors. We then display the error message using curly braces and referencing the "errorMessage" field in the form.

Now, let's see how you can handle these server errors in your AngularJS controller. When you receive an error response from the server, you can set the error message in your form controller. Here's an example of how you can do this:

$http.get('api/data')
    .then(function(response) {
        // Handle successful response
    })
    .catch(function(error) {
        $scope.myForm.errorMessage = error.data.message;
        $scope.myForm.$setValidity('serverError', false);
    });

In this code snippet, we are making an HTTP request to fetch data from an API. If an error occurs, we set the error message received from the server to the "errorMessage" field in the form controller. We also use the $setValidity method to set the validity of the "serverError" key to false, which will trigger the ng-message directive in the HTML to display the server error message.

By following these simple steps, you can easily display server errors in your AngularJS application using ngMessages. This not only enhances the user experience by providing clear feedback but also helps in debugging and resolving issues efficiently. So, next time you're working on an AngularJS project, remember to leverage the power of ngMessages to handle server errors like a pro. Happy coding!