ACF if have_rows( ) not returning anything - php

Question

I'm trying to use a repeater field and can't seem to get it to work. I think it's an issue with my if statement because if I remove the while loop and try echo out anything from <?php if( have_rows($aboutInfo['cards']): ?> I get nothing. I've tried without the ID, and a hardcoded ID as the 2nd param. Also, just to test I did <?php if( !have_rows($aboutInfo['cards']): ?> and was able to get something to echo out.
The print_r above the if statement displays the array.
<?
/*
Template Name: 01-Homepage
*/
get_header(); ?>
<? $aboutInfo = get_field( 'about' ) ?>
<?$postid = get_the_ID(); ?>
<div class="row">
<div class="columns small-12 medium-7">
<h2>
<?= $aboutInfo['title'] ?>
</h2>
<p class="lead"> <?= $aboutInfo['content'] ?></p>
<pre><?php print_r($aboutInfo['cards']) ?></pre>
<?php if( have_rows($aboutInfo['cards'], $postid) ): ?>
<?php while(have_rows($aboutInfo['cards'])) : the_row(); ?>
<?php $image = get_sub_field('image') ?>
<p><?= $image['url'] ?></p>
<?php endwhile; ?>
<?php endif; ?>
</div>
</div>
<?php get_footer(); ?>
Here is what my ACF looks like

Answer 1

I think you are doing it wrong. There are so many bugs in your code. check
https://www.advancedcustomfields.com/resources/group/ and have_rows() the first param need to be selector. check below code.
<?php
/* Template Name: 01-Homepage */
get_header();
$aboutInfo = get_field( 'about' );
$postid = get_the_ID();
if( have_rows('about') ):
$title = get_sub_field('title');
$content = get_sub_field('content');
?>
<div class="row">
<div class="columns small-12 medium-7">
<?php while( have_rows( 'about' ) ): the_row(); ?>
<h2><?php echo $title; ?></h2>
<p class="lead"><?php echo $content; ?></p>
<?php if( have_rows( 'cards' ) ): while( have_rows( 'cards' ) ) : the_row(); ?>
<?php $image = get_sub_field( 'image' ); ?>
<img src="<?php echo $image['url']; ?>" />
<?php endwhile; endif;
endwhile; ?>
</div>
</div>
<?php endif;
get_footer(); ?>

Answer 2

The issues was that I created a group called "about" and the "cards" were nested in that group and to access that field I needed to use "about_cards".
<?
/*
Template Name: 01-Homepage
*/
get_header(); ?>
​
<?php while ( have_posts() ) : the_post();
​
// group field
$about = get_field( 'about' );
if ( !empty( $about ) ) { ?>
​
<div class="row">
<div class="columns small-12 medium-7">
​
<?php if ( !empty( $about['title'] ) ) { ?>
<h2><?php echo esc_html( $about['title'] ); ?></h2>
<?php }
if ( !empty( $about['content'] ) ) { ?>
<p class="lead"><?php echo wp_kses_post( $about['content'] ); ?></p>
<?php }
​
if( have_rows( 'about_cards' ) ) : // repeater
​
while ( have_rows( 'about_cards' ) ) : the_row();
​
$about_card_image = get_sub_field('image');
$about_card_title = get_sub_field('title');
$about_card_content = get_sub_field('content');
​
if ( !empty( $about_card_image ) ) {
echo wp_get_attachment_image( $about_card_image, 'medium' );
}
​
if ( !empty( $about_card_title ) ) {
echo '<h3>' . esc_html( $about_card_title ) . '</h3>';
}
​
if ( !empty( $about_card_content ) ) {
echo '<p>' . esc_html( $about_card_content ) . '</p>';
} ?>
​
<?php endwhile;
endif; ?>
</div>
</div>
​
<?php } // about field not empty ?>
​
<?php endwhile; // End of the loop. ?>
​
<?php get_footer(); ?>