Hi all-
I'm taking my first stab at visualforce pages. I am trying to generate a pdf of an opportunity record and having it attach to the record via a custom button. I feel like i'm close because I can see the pdf working when I just load the VF page (with fields populated), and then the button I created is "generating" an attachment on the record, but I'm missing something in the middle becuase the pdf attachment fields are empty. I've pieced together code samples I found online.

The first thing I did was create a VF page, pdfOpp:

<apex:page standardController="Opportunity" renderAs="pdf">
<center>
<h1>PRE-ADMISSION PHONE SCREEN</h1>
</center>

<table>
<b>DETAILS:</b>
<hr/>
<tr><th>Pre-Admission Phone Screen Name:</th>
    <td><apex:outputText value="{!Opportunity.Name}"/></td>
    </tr>
<tr><th>Owner:</th>
    <td><apex:outputText value="{!Opportunity.Owner.Name}"/></td>
    </tr>
<tr><th>Created Date:</th>
    <td><apex:outputText value="{0,date,long}">
        <apex:param value="{!Opportunity.CreatedDate}"/>
        </apex:outputText></td>
    </tr>
 <tr><th>Account Name:</th>
    <td><apex:outputText value="{!Opportunity.Account.Name}"/></td>
    </tr>
 <tr><th>Stage:</th>
    <td><apex:outputText value="{!Opportunity.StageName}"/></td>
    </tr>
</table>
</apex:page>



I then created an apex class:

*/
public class attachPDFToOpportunity2 {
    
    private final Opportunity a; //Opportunity object
    
    //constructor
    public attachPDFToOpportunity2(ApexPages.StandardController standardPageController) {
        a = (Opportunity)standardPageController.getRecord(); //instantiate the Opportunity object for the current record
    }
    
    //method called from the Visualforce's action attribute
    public PageReference attachPDF() {
        
        //generate and attach the PDF document
        PageReference pdfPage = Page.pdfOpp; //create a page reference to our pdfOpp Visualforce page
        Blob pdfBlob; //create a blob for the PDF content
        if (!Test.isRunningTest()) { //if we are not in testing context
            pdfBlob = pdfPage.getContent(); //generate the pdf blob
        } else { //otherwise, we are in testing context and getContent() 
            pdfBlob = Blob.valueOf('Some Text');
        }
        Attachment attach = new Attachment(parentId = a.Id, Name = 'pdfAttachmentDemo.pdf', body = pdfBlob); //create the attachment object
        insert attach; //insert the attachment
        
        //redirect the user
        PageReference pageWhereWeWantToGo = new ApexPages.StandardController(a).view(); //we want to redirect the User back to the Opportunity detail page
        pageWhereWeWantToGo.setRedirect(true); //indicate that the redirect should be performed on the client side
        return pageWhereWeWantToGo; //send the User on their way
    }
}

I next created the second VF page called attachPDFtoOpportunity:

<apex:page action="{!attachPDF}" extensions="attachPDFToOpportunity2" standardController="Opportunity">

    <apex:pageMessages ></apex:pageMessages><!-- included for display of errors should they occur -->
    <apex:detail inlineEdit="true" relatedList="true"></apex:detail> <!-- included so Opportunity detail information is visible when errors occur -->
</apex:page>

Lastly, I created a custom button. When I click on my Generate PDF button, it does generate a pdf and saves it to my Opportunity record, but it only includes headers and field names. No fields are actually populated.

Thank you!!!
Megg