Code By Code – Lightning Framework – Chapter 15 – Aura Method

Code By Code – Lightning Framework – Chapter 15 – Aura Method

Chapter 15

Topics for this chapter:

  • Aura Method – Parent to Child Communication
  • Ternary Operator

Aura Method

In our chapter 13, we have learned about component events which were used for child to parent communication in the same component hierarchy. Similar way aura:method is a lightning way to communicate down the component hierarchy.

This enables you to directly call a method in a component’s client-side controller. Use aura:method to communicate down the containment hierarchy. For example, a parent component calls an aura:method on a child component that it contains.
The tag has these system attributes
name – (String) : The method name.
action – (Expression) : The client-side controller action to execute.
access – (String) : Access control for the method. Global or Public

NOTE: aura:method can also have attributes which act as method parameters, and can also return values to parent component.

Ternary Operator

Handle if-else condition with ternary operator in component markup.
{! Condition ? true : false}

Example:
{! v.selected ? ’tile selected’ : ’tile’}
– If selected=true, then apply stylesheets ‘tile’ and ‘selected’
– If selected=false, then apply stylesheet ‘tile’

CarSearch Component

Component Markup

Component Controller

CarSearchResult Component

Component Markup


Component Controller


Component Helper


Apex Controller


What does this code speak?

The CarSearch component is the parent component of CarSearchForm and CarSearchResult component.  It has the aura:handler to handle the component event being fired from CarSearchForm. It also fires the aura method of CarSearchResult component.

The CarSearchResult component is child component of CarSearch component. It has an Apex Controller “CarSearchController” to perform server-side tasks like get car and owner information.

This component also has an aura:method which is being called from parent “CarSearch” component. This aura:method calls a controller action which further calls the helper method.

CarSearchResult component is a parent of CarTile component which displays car image and information.

Lightning Component Development Day7 - Aura Method, Understand Layouts, Call Child Component Action

Test your knowledge

Aura Method

Next In This Guide

Manish Choudhari

I am a certified Salesforce Application & System Architect and Developer working on Salesforce Technology since 2014. Currently, I have 14 Salesforce certifications along with OCPJP (Oracle Certified Profession JavaSE6 Programmer) working in Salesforce.com Hyderabad as a Technical Engineer. Writing technical blogs, learning new technologies and frameworks and sharing knowledge is my hobby.

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