Prepopulating custom field look up value on Opportunity Using URL hacking

Question

There is master_account__c lookup(Account), Account(standard field) on Opportunity i am trying to prepopulate both the values with same Account field through custom button.I am able to prepouplate Account field but failed to update master_account__c lookup(Account).

Custom button code: /006/e?&accid={!Account.Id}

VF page for record type selection:

<apex:page standardController="Opportunity" tabStyle="Opportunity"  extensions="OpportunityRecordTypeSelection">
   <apex:sectionHeader title="New Opportunity" subtitle="Select Opportunity Record Type"/>
        <apex:form id="theForm">
            <apex:pageBlock title="Select Opportunity Record Type">
                <apex:pageBlocksection >
                    <apex:pageBlockSectionItem >
                        <apex:outputLabel > RecordType of new record </apex:outputLabel>
                        <apex:selectList size="1"  value="{!selectedRecordType}"  >
                            <apex:selectOptions value="{!RecordTypeList}" />
                        </apex:selectList> 
                    </apex:pageBlockSectionItem>
                 </apex:pageBlocksection>

                <apex:pageBlockButtons location="bottom">       
                    <apex:pageBlocksection >
                        <apex:pageBlockSectionItem > 
                            <apex:commandButton action="{!continueToOpportunity}" value="Continue" />
                            <apex:commandButton onclick="CloseTab();return false;" action="{!cancelRec}" value="Cancel"/>
                        </apex:pageBlockSectionItem>
                    </apex:pageBlocksection>
                 </apex:pageBlockButtons>   
               </apex:pageBlock>
        </apex:form>
    </apex:page>

Apex controller:

public class OpportunityRecordTypeSelection
    {
        Opportunity a;
        ApexPages.StandardController controller;
         public Id accid;

        public OpportunityRecordTypeSelection(ApexPages.StandardController controller)
        {
            this.controller = controller;
            a = (Opportunity) Controller.getRecord();
         accid = ApexPages.currentPage().getParameters().get('accid');

          }
public PageReference continueToOpportunity() 
        {   
            System.debug('@@@'+selectedRecordType);

            if((selectedRecordType =='PM-P Opportunity' || selectedRecordType =='FPD PR Opportunity' || selectedRecordType =='IR3535 EU' ||selectedRecordType )
            {

           Id devRecordTypeId = Schema.getGlobalDescribe().get('Opportunity').getDescribe().getRecordTypeInfosByName().get(selectedRecordType).getRecordTypeId(); 

                if(accid!=Null)
                {
                PageReference pageRef=new PageReference('/006/e?retURL=%2F006%2Fo&accid='+accid+'&RecordType='+devRecordTypeId+'&ent=Opportunity&Master_Account__c='+accid+'&RecordType='+devRecordTypeId+'&ent=Opportunity');
                pageRef.getParameters().put('nooverride','1');
                pageRef.setRedirect(true);
                return pageRef;
                }
}

Please find the URL i am getting once i clicked on continue.

Answer 1

This blog goes into detail on how to use urlhacking to prepopulate a custom lookup field.

To populate a Lookup value we need the field ID as before but this time we need to add CF to the front of the ID so it looks something like this – CF00Ni000000EpsgO. This is required when populating a custom lookup field. The first part to populate a lookup value is to grab the name of the record we are populating. So using the method before but with the added CF you can expect your button URL to look like this

/a0U/e?CF00Ni000000EpsgO={!Opportunity.Name}

The next step is to grab the ID of the record we wish to populate. This time though, we are going to add “_lkid” to the end of our field ID (plus the CF we added on earlier). This lkid parameter is telling Salesforce this is a lookup field. So it looks a bit like this.

/a0U/e?CF00Ni000000EpsgO={!Opportunity.Name}&CF00Ni000000EpsgO_lkid={!Opportunity.Id}