Why is get.sobject('Id') method appending a 3-char string? [duplicate]

Question

I am creating a custom DML Log in our Salesforce sandbox, and I created a Class & method that fires based on an Apex Trigger Here's the class:

public class Util {

public static void logDmlDeleted(Sobject[] sObjList) {
    DML_Log__c[] logInsList = new List<DML_Log__c>();
    for (Sobject sobj : sobjList)
       logInsList.add(new DML_Log__c(SObject_Type__c = sobj.getSobjectType().getDescribe().getName(),               
                                 Name__c = (String) sobj.get('name'),
                                 SObject_Id__c = (String) sobj.get('Id')
                                 ));

    insert logInsList; 
    }
}

The SObject_Id__c was an addition I added to record the Id of the sObject. It looks like this is working, except for the fact that there is an additional string of characters randomly appended: 'MAU'.

Here's a standalone sObject String Id:

a0HJ0000007yBdQ

And here is how that Id is written to the DML Log field:

a0HJ0000007yBdQMAU

How can I adjust the statement in the method so only the string's virgin Id is passed into the field?

Answer 1

SFDC has two forms of ID .

The API can return either a case-sensitive or a case-insensitive ID field value.

The case-insensitive ID is identical to the 15-character case-sensitive ID with three extra characters appended to indicate the case of each of the original 15 characters. When inserting or updating records, the API accepts either the 15-character case-sensitive ID or the 18-character case-insensitive ID.

You can truncate the last three digits with substring function or another would be to type cast to ID instead of string

SObject_Id__c = (Id) sobj.get('Id');

Note : Please declare SObject_Id__c as the Id data type