System.NullPointerException: Attempt to de-reference a null object:

Question

I am new to salesforce. I was trying to update that account record name belong to me. I am getting

System.NullPointerException: Attempt to de-reference a null object

could some can help me here is my class

public with sharing class AccountController {
    ApexPages.StandardController GstdController;
    public Account ER;

    ApexPages.StandardController stdcontroller;

    public AccountController(ApexPages.StandardController controller) {
       GstdController=controller;
       this.ER= (Account)controller.getRecord();
       this.stdController = controller;

    }

    public PageReference Save() {
        system.debug('Save::::1111');
        String rType = ApexPages.currentPage().getParameters().get('RecordType');
        system.debug('sc::::'+rType);
        this.ER.RecordTypeId = rType;

        PageReference pr= stdController.save();
        //insert ER;
         pr.setRedirect(false);
         system.debug('Save::::2222');

        return pr;  
    }
}

Answer 1

Based on my understanding, whenever you use getRecord() method, it does not mean it will load all the Account property except if the properties are defined in Visual Force Page example {!RecordTypeId} .

Can you try retrieve Account record including RecordTypeId then update it with the one that you retrieve from parameter?

Something like this:

this.ER =[Select Id,RecordTypeId from Account where Id =: controller.getId()]
this.ER.RecordTypeId = recType;//get this from parameter

//then update code

Hope it help.

Thanks