Apex SOQL subquery in Visualforce

Question

I am looking at showing a subquery SOQL query in an Visualforce page. This is my SOQL Expression.

public ApexPages.StandardSetController setCon {
        get {
            if(setCon == null) {
                setCon = new ApexPages.StandardSetController(Database.getQueryLocator(
                    [SELECT Contact.Id, Opportunity.Id, Contact.FirstName, Contact.LastName, Contact.Phone,Contact.Account.Name, Contact.Email,Contact.Last_Contacted__c,Contact.Membership_Type__c,Opportunity.Call_Disposition__c, Opportunity.Sales_Stage__c,Opportunity.Name, Opportunity.CloseDate, Opportunity.StageName, Opportunity.CreatedDate FROM OpportunityContactRole where Opportunity.OwnerId=:Userinfo.getUserId()]));
            }
            return setCon;
        }
        set;
    }

It got a message 'OpportunityContactRole is not supported in StandardSetController'. So I tried to get Opportunity and Contact info from Account...

So my SOQL query changed to:

SELECT Name, (SELECT Name, Phone, Email, Last_Contacted__c, Contact.Membership_Type__c FROM Account.Contacts) , (SELECT Call_Disposition__c, StageName, CreatedDate, CloseDate FROM Account.Opportunities) FROM Account where Id=:UserInfo.getUserId()])

but now in my Visualforce page I am not able to access the subquery fields:

<apex:page controller="SalesRepPageControllerV3" tabstyle="contact" sidebar="false" showChat="true" >
   <apex:form id="theForm">
    <apex:sectionHeader title="Sales Rep Page for {!$User.FirstName}"/>
      <apex:pageBlock id="innerblock" mode="edit"> 
         <apex:pageMessages />

        <apex:pageBlock id="innerblock">  
        <apex:pageBlockSection id="pagesection">  
            <apex:pageBlockTable value="{!ContactOpportunity}" var="co" id="pageblocktable">
              <apex:column headerValue="Created Date" value="{!co.Opportunity.CreatedDate}"/>  
              <apex:column headerValue="First Name" value="{!co.Contact.FirstName}"/>  
              <apex:column headerValue="First Name" value="{!co.Contact.LastName}"/>
              <apex:column headerValue="Phone" value="{!co.Contact.Phone}"/>
              <apex:column headerValue="Account Name" value="{!co.Contact.Account.Name}"/>
              <apex:column headerValue="Email" value="{!co.Contact.Email}"/>
              <apex:column headerValue="Last Contacted" value="{!co.Contact.Last_Contacted__c}">
              </apex:column>

                <apex:column headerValue="Membership Type" value="{!co.Contact.Membership_Type__c}"/>
                <apex:column headerValue="Call Disposition">
                    <apex:inputField value="{!co.Opportunity.Call_Disposition__c}"/>
                </apex:column>
                <apex:column headerValue="Sales Stage">
                    <apex:inputField value="{!co.Opportunity.Sales_Stage__c}"/>
                </apex:column>         
            </apex:pageBlockTable>
           </apex:pageBlockSection>

        </apex:pageBlock>
        <apex:pageBlockButtons >
           <apex:commandButton value="Save" action="{!save}" reRender="pageblocktable"/>
           <apex:commandButton value="Cancel" action="{!cancel}"  reRender="pageblocktable"/>
        </apex:pageBlockButtons>  
     </apex:pageBlock>
     <apex:panelGrid columns="2">
              <apex:commandLink action="{!previous}">Previous</apex:commandlink>
              <apex:commandLink action="{!next}">Next</apex:commandlink>
    </apex:panelGrid>
    </apex:form>   
</apex:page>

It does not understand the co.Opportunity and co.Contact as it is not a Account. And if I change it to co.Opportunities or co.Contacts it is an Arraylist which can only be accessed by repeat.

The problem with apex:repeat is it does not have column header values which I need to sort by. Please if someone can help please let me know how.

Answer 1

Heavily edited...

I don't think you can use a standard set controller for this. Using a custom controller I was able to get a consolidated list of opportunity contacts for the current user:

Page:

<apex:page controller="TestQueryController">
  <apex:form >
    <apex:pageBlock >
        <apex:pageBlockTable value="{!opportunities}" var="co">
            <apex:column value="{!co.Opportunity.CreatedDate}"/>
            <apex:column value="{!co.Contact.FirstName}"/>
            <apex:column value="{!co.Contact.LastName}"/>
            <apex:column headerValue="Stage">
                <apex:inputField value="{!co.Opportunity.StageName}"/>
            </apex:column> 
        </apex:pageBlockTable>
    </apex:pageBlock>
  </Apex:form>
</apex:page>

Controller:

public with sharing class TestQueryController {
    List<OpportunityContactRole> myOCR;

    public List<OpportunityContactRole> getOpportunities() {
        if (myOCR == null) {
            myOCR = [SELECT Contact.Id, Opportunity.Id, Contact.FirstName, Contact.LastName, Contact.Phone,
                Contact.Account.Name, Contact.Email, Opportunity.Name, 
                Opportunity.CloseDate, Opportunity.StageName, Opportunity.CreatedDate 
                FROM OpportunityContactRole where Opportunity.OwnerId=:Userinfo.getUserId()];
        }
        return myOCR;
    }
}

You will need to substitute in your custom fields. If you need sorting, this blog post gives one approach, though you can probably avoid repeat trips to the database using a wrapper class and the Apex Comparable interface. Finally, you'll need to implement your own save logic. Good luck!