How to call apex class from lightning component?

In this post we will talk about how to call Apex class from Lightning Component. Step 1) Create on Apex Class with @AuraEnabled annotation and method must be static. Step 2) Create Lightning Component with controller. Step 4) As per best practice use Helper method for all logic.

How to create apex controller in Lightning aura?

This component will contain a component body and also contain some code in the helper JavaScript file. Additionally, we will also create an Apex Controller for this component called ApexHelperController. I created a Gist showing all of the code we need to put together along with a sample of how to use it:

How do I set up a lightning component?

If you face issues in grasping any of them, feel free to post your questions on this post. Now go to setup > tabs > Lightning Component tabs > New and define a new tab for this lightning component. Ensure that you have enabled My domain in your organization for lightning component tabs to be visible in your setup.

How to create a soql function in Lightning?

The above can be accomplished by creating a small utility component that defines the apex and soql functions. First we’ll create a new Lightning Component and name it ApexHelper. This component will contain a component body and also contain some code in the helper JavaScript file.

What are the imported methods in Salesforce Lightning?

The imported methods are functions that the component can call either via @wire or imperatively. Before you use an Apex method, make sure that there isn’t an easier way to get the data, for example, using a base Lightning component. See Data Guidelines.

Can a web component import methods from apex?

Lightning web components can import methods from Apex classes. The imported methods are functions that the component can call either via @wire or imperatively. Before you use an Apex method, make sure that there isn’t an easier way to get the data.

How to call client side method in Lightning component?

To call the server side method we need to create the instance of server side method in client side controller. 1). setParams () : To set the parameter of server side controller method. 2). setCallback (this, function (response) {}) : To perform the tasks when we get the response of server side controller method.

Why do I get no response from apex?

I am creating a basic lightning component which got just one button. On click of this button, I am calling an apex method which return a string. For some reason, whenever I am clicking that button, I get no response. In the console, lightning event log and debug log, I get no error.

What happens when you extend a class in apex?

You can extend a class to provide more specialized behavior. A class that extends another class inherits all the methods and properties of the extended class. In addition, the extending class can override the existing virtual methods by using the override keyword in the method definition.

Can a lightning component extend more than one interface?

Interfaces in Lightning Components. A component can implement multiple interfaces, but extend only a single component. This is just like Apex which allows a class to implement multiple interfaces but only extend a single class. An interface can only declare attributes and cannot have anything else defined in it.

Is there a way to return data from apex?

I am able to successfully call the Apex Class and Method and return data, but the data is empty/Null. The actual Apex Class/Method Call is done towards to bottom of the JS.

How to call apex class from lightning component?