Access value of Email field through Lookup

Question

So I need to access the value of an email field which is set by a workflow. However this needs to be done through a lookup relasionship as seen below.

Customobj1__c newRecord = new Customobj1__c();
newRecord.populatefields = 'ect';

sObject newobject;
newObject = newRecord;

Customobj1__c (child) has a lookup relasionship to Customobj2__c (parent). So if I want to get a value of Customobj2__c field I do the following

newRecord.customRelasionship__r.obj2Field__c;

To access a value of a field in Apex I use the following (for picklist field):

 Schema.sObjectType objType = objObject.getSObjectType();
 Schema.DescribeSObjectResult objDescribe = objType.getDescribe();
 map < String, Schema.SObjectField > fieldMap = objDescribe.fields.getMap();
 list < Schema.PicklistEntry > values =
   fieldMap.get(fld).getDescribe().getPickListValues();     

The issue I am having is since I have a lookup relasionship, I cant use the sObject methods. I believe I need to specify that the sObjectType is of Customobj2__c (to access the email field) and then cast it back to sObject to use the rest of the methods. Once I have a map of all the fields in Customobj2__c, I can use fieldMap.get(emailfield__c) but how do I actually obtain the value in this field?

I tried the following but it says getSObjectType() is not recognized since its of type Customobj1__c and not sObject

((Customobj1__c)newObject).customRelasionship__r.obj2Field__c.getSObjectType(); 

Answer 1

The picklist code which you have shared is used to get the Metadata of picklist field while in current case you need the actual data of email field. So you need a SOQL and then get the data.

If you dynamically want to access the data then you need getSobject to traverse up in relationship.

sObject sob = [SELECT customRelasionship__r.obj2Field__c FROM Customobj1__c LIMIT 1];
String email= (String) sob.getSobject('Customobj2__c').get('Email__c');
System.debug(email);