Salesforce Apex Trigger - Parent to Child Trigger Using List

Hello guys,

In this blog, I am sharing the code of trigger it will update the contact field on updation or insertion of Account field. Here, I am just updating the contact field named Update_Checking__c whenever new value enters on parent object account field named Update_Checking__c.

For this, you need two custom field –

1. Create custom field name as Update Checking in Account
2. Create custom field name as Update Checking in Contact.

Don't forget to check out: Salesforce Apex Trigger - Child to Parent Trigger using Map

trigger UpdateFieldInContact on Account (after insert, after update) {   
    List<Contact> conList = new List<Contact>();    
    for(Account acc: Trigger.new)
    {
        String newValueInUpdateChecking = acc.Update_Checking__c;
        for(Contact con: acc.Contacts)
        {
            Contact conObj = new Contact();
            conObj.Id = con.Id; 
            conObj.Update_Checking__c = newValueInUpdateChecking;
            conList.add(conObj);
        }
    }
    Update conList;
}

Thanks.

Happy Coding.