Trigger to Update the Custom Last Modified Date Field in the Parent Object When the Records in the Child Object is Updated Using Apex Trigger in Salesforce | How to get the last modified date of a custom object in apex trigger

779 views

Hey guys, today in this post we are going to learn about how to update the Custom last modified date field in the parent object when the Records in the child object is updated using Apex Trigger in Salesforce.

Real time scenarios:- Write a trigger on Child object and update the custom Last Modified Date Field, LastModifiedDate__c (Date/Time Type) in the Parent Object When the Records in the Child Object is Updated.

parentObjTrigger:- Custom Fields & Relationships

Download ebooks:- Click here to download E-Book "The most 20 popular articles of w3web.net"

Create a custom field on parent Object name as LastModifiedDate__c (Date/Time Type).

childObjTrigger:- Custom Fields & Relationships

Create a lookup relationship field on child Object name as childLookup__c :: Lookup(parentObjTrigger).

Don’t forget to check out:- Apex Trigger to Send a Custom Visualforce Component Email Template when Record is Created on Custom Object in Salesforce Click Here For More Information

Files we used in this post example:-

LastModifiedDateTrigger.apxt

Apex Class Trigger

It will be fire whenever update a record on child object

Parent Cusotm Object:- parentObjTrigger__c

Custom Field:- LastModifiedDate__c

Lightning Component

Trigger on child custom object and update the custom Last Modified Date Field in the Parent Object Whenever the records in the Child Object is changed.

Child Custom Object:- childObjTrigger__c

Custom Field:- childLookup__c : Lookup(parentObjTrigger)

Child Object with Custom Lookup Field

childLookup__c : Lookup(parentObjTrigger) field it is help to communicate between parent object.

Final Output

Other related post that would you like to learn in Salesforce

Subscribe My Channel :- ClassicVijayW3web - YouTube

Step 1:- Apex Class Trigger : LastModifiedDateTrigger.apxt

   trigger LastModifiedDateTrigger on childObjTrigger__c (before insert, after insert, before update, after update) {
      Map<Id,Datetime> idLastModifiedDateMap = new Map<Id,Datetime >();
      List<Datetime> childIdList = new List<Datetime>();
      Set<Id> setIdList = new Set<Id>();
    
     
    if(trigger.isBefore){
        system.debug('trigger before event');
    }else if(trigger.isAfter){
        system.debug('trigger after event');
        if(trigger.isUpdate){
            for(childObjTrigger__c temp : trigger.new) {
              childIdList.add(temp.LastModifiedDate);  
            }
            system.debug('childIdList ' + childIdList);
            List<parentObjTrigger__c> prntList= [Select Id, LastModifiedDate__c, (Select Id, LastModifiedDate From childObjTriggers__r Where LastModifiedDate=:childIdList) From parentObjTrigger__c];
            List<parentObjTrigger__c> lastDate = new List<parentObjTrigger__c>();
            for(parentObjTrigger__c p1:prntList){
                for(childObjTrigger__c c1:p1.childObjTriggers__r){
                    system.debug('c1 ' + c1.LastModifiedDate);
                    p1.LastModifiedDate__c=c1.LastModifiedDate;                  
                    lastDate.add(p1);                   
                }
            }
            update prntList;
            system.debug('lastDate1### ' + lastDate);
        }
    }
}

trigger LastModifiedDateTrigger on childObjTrigger__c (before insert, after insert, before update, after update) {

Map<Id,Datetime> idLastModifiedDateMap = new Map<Id,Datetime >();

List<Datetime> childIdList = new List<Datetime>();

Set<Id> setIdList = new Set<Id>();

if(trigger.isBefore){

system.debug('trigger before event');

}else if(trigger.isAfter){

system.debug('trigger after event');

if(trigger.isUpdate){

for(childObjTrigger__c temp : trigger.new) {

childIdList.add(temp.LastModifiedDate);

}

system.debug('childIdList ' + childIdList);

List<parentObjTrigger__c> prntList= [Select Id, LastModifiedDate__c, (Select Id, LastModifiedDate From childObjTriggers__r Where LastModifiedDate=:childIdList) From parentObjTrigger__c];

List<parentObjTrigger__c> lastDate = new List<parentObjTrigger__c>();

for(parentObjTrigger__c p1:prntList){

for(childObjTrigger__c c1:p1.childObjTriggers__r){

system.debug('c1 ' + c1.LastModifiedDate);

p1.LastModifiedDate__c=c1.LastModifiedDate;

lastDate.add(p1);

}

update prntList;

system.debug('lastDate1### ' + lastDate);

}

Further post that would you like to learn in Salesforce

TechW3web:- To know more, Use this Link

FAQ (Frequently Asked Questions)

What triggers last modified date Salesforce?

LastModifiedDate is automatically updated whenever a user creates or updates the record. LastModifiedDate can be updated to any back-dated value if your business requires preserving original timestamps when migrating data into Salesforce.

How do I change the last modified date in Salesforce?

Created Date and Last Modified Date fields in Salesforce objects are audit fields and we can't edit or change these field directly or through code. You have to contact salesforce support team for them to grant permissions to you to edit or change these fields if needed.

What does last modified date mean in Salesforce?

Last Modified is the date and time stamp for changes (for example, changes to a phone number or an address) made to an individual record. This also shows the User who made the change. Last Activity shows when someone in your Organization last did something related to the record.

Author of w3web.net

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

8 thoughts on “Trigger to Update the Custom Last Modified Date Field in the Parent Object When the Records in the Child Object is Updated Using Apex Trigger in Salesforce | How to get the last modified date of a custom object in apex trigger”

Affaq Shahid

September 11, 2020 at 8:37 am

Thanks for sharing this wonderful information I really enjoyed reading it keep up the good work.
I am impressed of your writing talents as well as with the format you use in your blog. If you have time please check my post on
permallink structure for wordpress.
pinjara khubsurti kaa

December 16, 2020 at 5:38 pm

You’re a beautiful inspiration. It really helps me in any situation. Where I stuck. Many of my friends told me to comment there post but I stuck what I should comment. Finally I got your post it always help me. Thanks for the lovely post.
Kapil matka

March 14, 2021 at 8:52 am

this site is good content article in our article . there are a value of the information of the post
matka

March 16, 2021 at 8:13 am

This is the best article in this site thanks for sharing this in this post/.
Carter

May 4, 2021 at 7:23 am

. Thanks for the lovely post….
Naveen G

June 2, 2021 at 12:55 pm

Thanks for sharing this wonderful post, I found a very informative blog today.
Carter

June 21, 2021 at 1:05 pm

Thanks for sharing this wonderful post, I found a very informative blog today…
muhammad kashif bilal

July 23, 2021 at 1:46 pm

Thanks For Sharing Wonderfull Ideas And Amazing content You Ever Create Please Keep Sharing And Keep It Up
May You Live Long

40 High Demand Gigs on Fiverr – Most Selling Gigs on Fiverr 2021