Write a trigger to update parent account phone number whenever the contact phone number is updated using trigger handler and helper class in Salesforce | How to update Account phone from Contact Phone based on lookup relationship in Salesforce

Hey guys, today in this post we are going to learn about How to Write a trigger to update parent account phone number when ever the contact phone number is updated using trigger handler and helper class in Salesforce

Real time scenarios:- Write a trigger on Contact to update the parent Account Phone number when ever the Contact Phone is updated through trigger handler and helper class in Salesforce.

Don’t forget to check out:- Trigger to check duplicate name to custom object in Salesforce Click Here For More Information

Files we used in this post example

contactTrigger.apxt	Apex Class Trigger	It will be fired when ever contact phone number is updated.
contactTriggerHandler.apxc	Apex Class Trigger Handler	Apex handler trigger to update account phone number with contact phone number when ever contact is updated.
Parent Object:- Account Fields:- Phone Child Object:- Contact Fields:- Phone, AccountId (Lookup)	Trigger to updated parent Account from Contact based on lookup relation AccountId.

Final Output

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You can download file directly from github by Click Here.

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Find the below steps for this post.

Create Apex Class Trigger

Step 1:- Create Apex Class : contactTrigger.apxt

From Developer Console ➡ File ➡ New ➡ Apex Class

contactTrigger.apxt [Apex Class Controller]

   TRIGGER contactTrigger ON Contact (BEFORE INSERT, BEFORE UPDATE, BEFORE DELETE, after INSERT, after UPDATE, after DELETE, after undelete) {

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```
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    IF(TRIGGER.isBefore ){
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        system.debug('I am before trigger ');

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    }
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    ELSE IF(TRIGGER.isAfter){
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        system.debug('I am after trigger ');

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        IF(TRIGGER.isUpdate){
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            contactTriggerHandler.afterUpdateHelper(TRIGGER.new);

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        }
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    }
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}
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Create Apex Trigger Handler and Helper Class

Step 2:- Create Apex Class : contactTriggerHandler.apxc

From Developer Console ➡ File ➡ New ➡ Apex Class

contactTriggerHandler.apxc [Apex Class Controller]

```
   public class contactTriggerHandler {
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    public static void afterUpdateHelper(List<Contact> conList){

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         Set<Id> setId = NEW Set<Id>();
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        FOR(Contact con:conList){
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            setId.add(con.AccountId);
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        }
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        system.debug('setId ' + setId);
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        List<Account> accItemList = [SELECT Id, Name, Phone, (SELECT Id, FirstName, LastName, Phone, AccountId FROM Contacts) FROM Account WHERE Id IN:setId];

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        FOR(Account a1:accItemList){
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            FOR(Contact c1:a1.Contacts){

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                IF(c1.Phone !=NULL){
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                     a1.Phone = c1.Phone;

                     UPDATE accItemList;

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                }
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            }
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        }
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    }
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}
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FAQ (Frequently Asked Questions)

What is trigger in Salesforce?

A trigger is an Apex script that executes before or after data manipulation language (DML) events occur.

Why do we use triggers in Salesforce?

Typically, we use triggers to perform operations based on specific conditions, to modify related records or restrict certain operations from happening.

What are different events in trigger?

The events that fire a trigger include the following: DML statements that modify data in a table ( INSERT , UPDATE , or DELETE ) DDL statements.

Vijay Kumar

Hi, This is Vijay Kumar behind the admin and founder of w3web.net. I am a senior software developer and working in MNC company from more than 8 years. I am great fan of technology, configuration, customization & development. Apart of this, I love to write about Blogging in spare time, Working on Mobile & Web application development, Salesforce lightning, Salesforce LWC and Salesforce Integration development in full time. [Read full bio] | | The Sitemap where you can find all published post on w3web.net