Hi Experts,

I am creating a custom button and when clicked, it generates the PDF and saves it in attachment but am encountering an error:
Too many nested getContent calls

Below is my Apex extension for the VF:

public class attachPDFToAccount {
    
    private final Account a; //Account object
    public String pdfContent = '<h1>Lorem Ipsum</h1><h4>"Neque porro quisquam est qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit..."</h4><h5>"There is no one who loves pain itself, who seeks after it and wants to have it, simply because it is pain..."</h5>';
    
     //constructor
    public attachPDFToAccount(ApexPages.StandardController standardPageController) {
        a = (Account)standardPageController.getRecord(); //instantiate the Account object for the current record
    } 
    
    //method called from the Visualforce's action attribute
    public PageReference attachPDF() {
        
        //generate and attach the PDF document
        PageReference pdfPage = new PageReference('/apex/GenerateSOA'); //create a page reference to our pdfDemo Visualforce page, which was created from the post https://interactiveties.com/blog/2015/render-visualforce-pdf.php
        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() gets funky so create the blob manually
        pdfBlob = Blob.valueOf(pdfContent);
        }
        Attachment attach = new Attachment(parentId = a.Id, Name = 'accSOA -' + DateTime.now().formatLong() + '.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 Account detail page
        pageWhereWeWantToGo.setRedirect(true); //indicate that the redirect should be performed on the client side
        return pageWhereWeWantToGo; //send the User on their way
    }

}

Here's my VF:

<apex:page action="{!attachPDF}" extensions="attachPDFToAccount" standardController="Account">
<!--
    Created by: Chris Ludovice
    Last Update: 10 May 2019 by Chris Ludovice
    
    Notes:
        - Visualforce page for creating a PDF file and attaching to Account
-->
    <apex:pageMessages ></apex:pageMessages><!-- included for display of errors should they occur -->
    <apex:detail inlineEdit="true" relatedList="true"></apex:detail> <!-- included so Account detail information is visible when errors occur -->
</apex:page>


Thanks.
Regards,
Chris L.