[SalesForce] How to save updates to a related record on a visualforce page

Salesforce DOESN'T handle this in custom save actions and doing an update instead of controller.save() makes no difference.

One solution would be to re-read the record from the database in your controller extension save() method, before committing the record (save/update), and compare the re-read SystemModstamp with the SystemModstamp of the record in your viewstate.

You will need to use controller.addFields(new List{'SystemModstamp'}) in the controller extension constructor if your page does not display the SystemModstamp.

If the SystemModstamps are different you know that the record has been modified and you can decide what to do.

For example:

public with sharing class OpportunityController
{
    ApexPages.StandardController m_controller;

    public OpportunityController(ApexPages.StandardController controller)
    {
        m_controller = controller;
        m_controller.addFields(new List<String>{'SystemModstamp'});
    }

    public ApexPages.PageReference save()
    {
        Opportunity record = (Opportunity) m_controller.getRecord();
        Opportunity dbRecord = [select SystemModstamp from Opportunity where Id=:record.Id];
        if(record.SystemModstamp!=dbRecord.SystemModstamp)
        {
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.FATAL, 'Someone else edited the record'));
            return null;
        }
        return m_controller.save();
    }
}

I wanted to let everyone know that I did get this resolved. Below is the code. (whew!) I could not get the product information and the rating information in the same table, so - if you have any suggestions about that it would be appreciated. But this does what we needed it to do, so I felt like it was the final answer.

public with sharing class ProductInfoClass {

 private final Reference_profile__c reference;
    public list<wrapperclass> prodwrapperret { get; set; }
    public list<wrapperclass> ratingwrapperret{get;set;}

    public ProductInfoClass(ApexPages.StandardController stdController) {
        reference = [SELECT Id, Account__c FROM Reference_profile__c
                   WHERE Id = :ApexPages.currentPage().getParameters().get('id')];

         list<MC_Products__c> object1 = [
            SELECT Id, Account__c,Product_Status__c,Initial_Installation_Date__c,
            Implemented_Date__c, Name 
            FROM MC_Products__c
            WHERE Account__c =:reference.Account__c]; 

        list<Rating__c> object2 = [
        SELECT id,mc_products__c, Account__c, mc_products_name__c,Rating__c, date__c 
        FROM Rating__c 
          WHERE Account__c =:reference.Account__c AND mc_products__c in:object1 Order by Date__c DESC];

       prodwrapperret = new list<wrapperclass>();
        for(MC_Products__c obj1: object1){
            prodwrapperret.add(new wrapperclass(obj1));
        }
        ratingwrapperret = new list<wrapperclass>();
        for(Rating__c obj2: object2){
            ratingwrapperret.add(new wrapperclass(obj2));
        }
    }

    public class wrapperclass{
        public MC_Products__c object_prod_1{get;set;}
        public Rating__c object_rating_2{get;set;}

        public wrapperclass(MC_Products__c obj1){
            this.object_prod_1 = (obj1);
        }
        public wrapperclass(Rating__c obj2) {
            this.object_rating_2 = (obj2);
        }


}    public Reference_profile__c getreference() {
        return reference;    
     } 

}

VF

<apex:page Standardcontroller="Reference_profile__c" extensions="ProductInfoClass" 
            sidebar="false" showheader="false">
    <apex:form >
        <apex:pageblock mode="inlineEdit">
         <apex:pageblocktable value="{!prodwrapperret}" var="acc">
          <apex:column headerValue="Product" value="{!acc.object_prod_1.name}" />
          <apex:column headerValue="Status" value="{!acc.object_prod_1.Product_Status__c}" />
          <apex:column ><apex:commandButton action="{!quicksave}" value="Save" id="theButton1"/></apex:column>
          </apex:pageblocktable>
          <br/>
          <br/>
          <br/>
          <apex:pageblocktable value="{!ratingwrapperret}" var="con">
          <apex:column headerValue="Product"  value="{!con.object_rating_2.MC_Products_Name__c}" />
          <apex:column headerValue="Rating"  value="{!con.object_rating_2.Rating__c}" />
          <apex:column headerValue="Date" value="{!con.object_rating_2.Date__c}" />
          </apex:pageblocktable>
         </apex:pageblock>
    </apex:form>
</apex:page>