I'm updating the Account billing address fields (that make up THE address field on the account), but the Address field itself is coming up null

Question

Since the address is a standard field, I'm assuming this process is pretty standard in setting it, but just in case, here's a very explicit explanation of how I'm updating it.

There are no standard fields on the Account for city, street, ZIP, etc...just the Address field. The only way to update this record in the interface is to double click the field area and it pops up with text fields for the street, city, ZIP, etc.

I want, on this update (After), to do other things. After some debugging, I found that when I update it and do system.debug(acc.BillingStreet), the street that I updated it to prints out correctly -- side note: BillingStreet doesn't appear on the list of standard fields...-- however, when I try system.debug(acc.BillingAddress), which should be all the components together, it's always null.

I can't imagine why it is null since it's the very thing that I'm updating. Here's the code for the trigger, but the issue has something to do with the address field, truly.

    trigger udtInvAddress on Account (After Update) {

    List<Order2__c> invoices;
    System.debug('This should go, at the very least');

    if(Trigger.isAfter){
        if(Trigger.isUpdate){

            //go through all of the accounts that this trigger effects
            for(Account acc : trigger.new){
                System.debug('HOW ABOUT THIS...?');
                System.debug(acc.BillingStreet);
                System.debug(Trigger.oldMap.get(acc.id).BillingStreet);
                    //separate all of the components of BillingAdress field in the account
                    Address addr = acc.BillingAddress;
                System.debug('ADDR = ' + addr);
                    String AccountStreet;
                    String AccountCity;
                    String AccountState;
                    String AccountZip;
                    String AccountCountry;
                    //only update address if a new address is actually entered
                    if(addr != null){
                        System.debug('The address is not null, so assign values');
                        AccountStreet = addr.street;
                        AccountCity = addr.City;
                        AccountState = addr.state;
                        AccountZip = addr.postalcode;
                        AccountCountry = addr.country;
                    }
                    //Query to find all matching invoices
                    System.debug('IS THIS THE PROBLEM?');
                     invoices = [SELECT Billing_City__c, Billing_State__c, Billing_Street__c, Billing_zip__c, Billing_Country__c FROM Order2__c WHERE Account_Name__c =:acc.ID];
                    for(Order2__c invoice: invoices){
                        System.debug(invoice.ID);
                        //update all of the fields with the updated information only if the new information is filled in.
                        if(AccountCity <> null){
                            invoice.Billing_City__c = AccountCity;
                        }
                        if(AccountState <> null){
                            invoice.Billing_State__c = AccountState;
                        }
                        if(AccountStreet <> null){
                            invoice.Billing_Street__c = AccountStreet;
                        }
                        if(AccountZip <> null){
                            invoice.Billing_zip__c = AccountZip;
                        }
                        if(AccountCountry <> null){
                            invoice.Billing_country__c = AccountCountry;
                        }

                    }


            }

        }

        update invoices;
    }


}

Answer 1

Approach 1

Since Address in Compound field, you can simply fetch each Address attributes from Account object from the SOQL query and update invoice records like this:

trigger udtInvAddress on Account (After Update) {
List<Order2__c> invoices;
if(Trigger.isAfter && Trigger.isUpdate){            
     invoices = [SELECT Id, Account__r.BillingStreet, Account__r.BillingCity, 
     Billing_City__c, Billing_State__c, Billing_Street__c, 
     Billing_zip__c, Billing_Country__c FROM Order2__c 
     WHERE Account_Name__c =:Trigger.newMap.keySet()];
    for(Order2__c invoice: invoices)
    {
        System.debug(invoice.ID);
        //update all of the fields with the updated information only if the new information is filled in.
        if(invoice.Account__r.BillingStreet <> null){
            invoice.Billing_Street__c = invoice.Account__r.BillingStreet;
        }
        //update other fields

    }
    update invoices;
}

Moreover, your query needs to be bulkified and would be outside of for loop.

Approach 2

The use case can be simply be implemented by Process Builder. In this below picture I have shown you how Invoice Billing Street can be mapped with Account's Billing Street via Reference.

The Account Address attributes can be picked up in the PB during field mapping like this:

Since, without writing code, this functionality can be achieved, I will go by Process Builder.