Clone record with changes in few fields

Question

I have below execute method of an apex batch class where I need to clone Question_Response_vod__c records of existing with changes in few fields. Can someone please guide me here. I have in code to create but not getting how to clone.

Apex Class snippet

List<Question_Response_vod__c> s2q1rListToInsert = new List<Question_Response_vod__c>();
    for(Question_Response_vod__c s1q1r : [Select Id,Survey_Question_vod__c,Text_vod__c from Question_Response_vod__c where Survey_Question_vod__c in : s1qlist])
    {

        s2q1rListToInsert.add(new Question_Response_vod__c(Survey_Question_vod__c=s1qs2qMap.get(s1q1r.Survey_Question_vod__c),Text_vod__c=s1q1r.Text_vod__c));  // Need to clone with changes in mentioned fields.
    }

    If(s2q1rListToInsert.size()>0)  
         Insert s2q1rListToInsert;

Answer 1

You can update your code to this:

List<Question_Response_vod__c> s2q1rListToInsert = new  List<Question_Response_vod__c>();
for(Question_Response_vod__c s1q1r : [Select Id,Survey_Question_vod__c,Text_vod__c from Question_Response_vod__c where Survey_Question_vod__c in : s1qlist])
{
    Question_Response_vod__c clonedRecord = s1q1r.clone();
    clonedRecord.Survey_Question_vod__c = /*New value here*/;
    clonedRecord.Text_vod__c = /*New value here*/;
    s2q1rListToInsert.add(clonedRecord);
}

Here, a new instance is created by cloning the current record in iteration, then change the value of the fields as per requirement and then add this record to the list to be inserted.