How to count the total number of rows in a ACF repeater output

问题

Question: How do you simply count the rows in the output of an ACF repeater field?

Goal: to make the output look different with a css class when there's only one row, vs. more than one row.

My code:

if( have_rows('testimonials')) {
    $counter = 0;
    $numtestimonials = '';

    //loop thru the rows
    while ( have_rows('testimonials') ){
        the_row();
        $counter++;
            if ($counter < 2) {                         
                $numtestimonials = 'onlyone';               
            }
        echo '<div class="testimonial ' . $numtestimonials . '">';
           // bunch of output here
        echo '</div>';                          
    }
}

Obviously, The way I do it here will not work as the count is < 2 the first time thru the row, so it returns true even if more rows are counted after.

Thank you!

回答1:

OK, I finally found the answer to this.

The way to count total rows in an ACF repeater is:

$numrows = count( get_sub_field( 'field_name' ) );

回答2:

You can get the row count like this:

$count = get_post_meta(get_the_ID(), 'testimonials', true);

Obviously this uses get_the_ID() to retrieve the current post ID - you may need to amend this.

ACF stores the repeater count value against the repeater field name as the meta_key in the postmeta table.

ACF uses the count to retrieve the correct repeater subfield values, which are stored as values against meta_keys with the format $repeaterFieldname . '_' . $index . '_' . $subfieldName.

Hope this helps...

回答3:

Looks like you would want to reset the value in $numtestimonials.

So, effectively, the code with a fix would be:

$output = "";
$numtestimonials = "";

while ( have_rows('testimonials') ){
    the_row();
    $counter++;
    $output .= "<span>" .$some_data. "</span>"; // bunch of output;
}

if($counter < 2){
    $numtestimonials = "onlyone";
}
$output = "<div class='testimonail ".$numtestimonials." '>"
              .$output
         ."</div>";
echo $output;

回答4:

Working with the Repeater Field

repeater can be accessed by get_field or the_repeater_field / the_sub_field

<?php if( have_rows('repeater_field_name') ): ?>

    <ul>

    <?php while( have_rows('repeater_field_name') ): the_row(); ?>

        <li>sub_field_1 = <?php the_sub_field('sub_field_1'); ?>, sub_field_2 = <?php the_sub_field('sub_field_2'); ?>, etc</li>

        <?php 

        $sub_field_3 = get_sub_field('sub_field_3'); 

        // do something with $sub_field_3

        ?>

    <?php endwhile; ?>

    </ul>

<?php endif; ?>

Randomly select a repeater field row

<?php

$rows = get_field('repeater_field_name');
$row_count = count($rows);
$i = rand(0, $row_count - 1);

echo $rows[ $i ]['sub_field_name'];

?>

Getting values from another page

<?php

$other_page = 12;

?>
<p><?php the_field('field_name', $other_page); ?></p>
<?php

// get variable
$variable = get_field('field_name', $other_page);

// repeater field: note that the_sub_field and get_sub_field don't need a post id parameter
if( have_rows('repeater_field_name', $other_page) ): ?>

    <ul>

    <?php while( have_rows('repeater_field_name', $other_page) ): the_row(); ?>

        <li>sub_field_1 = <?php the_sub_field('sub_field_1'); ?>, sub_field_2 = <?php the_sub_field('sub_field_2'); ?>, etc</li>

        <?php 

        $sub_field_3 = get_sub_field('sub_field_3'); 

        // do something with $sub_field_3

        ?>

    <?php endwhile; ?>

    </ul>

<?php endif; ?>

Query posts with ACF values

An example of finding Events (post type) where location (custom field – select) equals Melbourne (value). Lots to read here: http://codex.wordpress.org/Template_Tags/get_posts.

<?php

$posts = get_posts(array(
    'numberposts' => -1,
    'post_type' => 'event',
    'meta_key' => 'location',
    'meta_value' => 'melbourne'
));

if($posts)
{
    echo '<ul>';

    foreach($posts as $post)
    {
        echo '<li><a href="' . get_permalink($post->ID) . '">' . get_the_title($post->ID) . '</a></li>';
    }

    echo '</ul>';
}

?>

回答5:

You may wanted to try this..

<?php 
$row = get_field('repeater', $post->ID);
if($row < 1) {
 $rows = 0;
} else {
 $rows = count($row);
} ?>
<p>Number of Row is (<?php echo $rows ; ?>)</p>

回答6:

You can try this code its working fine :

<?php if( have_rows('repeater_name') ):
$my_fields = get_field_object('repeater_name');
$count = (count($my_fields));
echo $count;
endif;?>

来源：https://stackoverflow.com/questions/43788167/how-to-count-the-total-number-of-rows-in-a-acf-repeater-output