Apex Trigger to update Account phone from Contact Phone based on lookup relationship in Salesforce | Update the related Account Phone if Contact Record is Created in Salesforce

Hey guys, today in this post we are going to learn about How to write Apex Trigger to update Account phone from Contact Phone based on lookup relationship in Salesforce.

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Create Apex Trigger →

Step 1:- Create Apex Controller : ContactTrigger.apxt

SFDX:Create Apex Trigger>> New >> ContactTrigger.apxt

ContactTrigger.apxt [Apex Trigger]

  TRIGGER ContactTrigger ON Contact (BEFORE INSERT, after INSERT) {

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    IF(TRIGGER.isBefore){
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    }ELSE IF(TRIGGER.isAfter){
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        ContactTriggerHandler.conRelAcc(TRIGGER.new);

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    }
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}
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Create Trigger Handler Controller →

Step 2:- Create Apex Controller : ContactTriggerHandler.apxc

SFDX:Create Apex Trigger>> New >> ContactTriggerHandler.apxc

ContactTriggerHandler.apxc [Trigger Handler]

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 public class ContactTriggerHandler {
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    public static void conRelAcc(List<Contact> conList){

        Map<Id, Contact> conMap = NEW Map<Id, Contact>();

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        FOR(Contact con:conList){
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            conMap.put(con.AccountId,con);

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        }
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        List<Account> accObjItem = NEW List<Account>();

        List<Account> accObjList = [SELECT Id, Name, Phone FROM Account WHERE Id IN:conMap.keySet()];

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        FOR(Account acc:accObjList){
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            acc.Phone = conMap.get(acc.Id).Phone;

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            accObjItem.add(acc);
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        }
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        IF(!accObjItem.isEmpty()){
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            UPDATE accObjItem;
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        }
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    }
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}
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Further post that would you like to learn in Salesforce

FAQ (Frequently Asked Questions)

What is the difference between before update and after update trigger?

Before Triggers are ideal for making changes to the triggering record, while After Triggers are suitable for working with related records and system-generated field values. Understanding this distinction is key to designing effective and efficient trigger logic in Salesforce.

What will happen if you try to update record in after trigger context?

If we perform update operation on the record in after update event logic recursive triggers will arise. Using static Boolean variable in an apex class (we should not keep static Boolean variable inside of the trigger) we can avoid recursive triggers.

What is the account contact relationship record?

In Salesforce, an Account-Contact Relationship refers to the association between an Account record (representing companies or organizations) and a Contact record (representing individuals).

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