WooCommerce Variation Gallery Deletes Other Field

• jarvis

• June 22, 2022 at 3:01 pm

Hi All,

Really hoping someone can help. I’ve got the following code:

<?php
###
# Add "Product Variation" location rule values
###
function wp_acf_location_rule_values_post_type($choices){

	$keys = array_keys($choices);
	$index = array_search('product', $keys);

	$position = $index === false ? count($choices) : $index + 1;

	$choices = array_merge(
		array_slice($choices, 0, $position),
		array('product_variation' => __('Product Variation', 'auf')),
		array_slice($choices, $position)
	);

	return $choices;
}

add_filter('acf/location/rule_values/post_type', 'wp_acf_location_rule_values_post_type');

###
# Add "Product Variation" location rule match
###
function wp__acf_location_rule_match_post_type($match, $rule, $options, $field_group){

	if ($rule['value'] == 'product_variation') {

		$post_type = $options['post_type'];

		if ($rule['operator'] == "==")
			$match = $post_type == $rule['value'];

		elseif ($rule['operator'] == "!=")
			$match = $post_type != $rule['value'];
	}

	return $match;
}

add_filter('acf/location/rule_match/post_type', 'wp__acf_location_rule_match_post_type', 10, 4);

###
# Render fields at the bottom of variations - does not account for field group order or placement.
###
add_action( 'woocommerce_product_after_variable_attributes', function( $loop, $variation_data, $variation ) {
    global $wp_i; // Custom global variable to monitor index
    $wp_i = $loop;
    // Add filter to update field name
    add_filter( 'acf/prepare_field', 'acf_prepare_field_update_field_name' );
    
    // Loop through all field groups
    $acf_field_groups = acf_get_field_groups();
    foreach( $acf_field_groups as $acf_field_group ) {
        foreach( $acf_field_group['location'] as $group_locations ) {
            foreach( $group_locations as $rule ) {
                // See if field Group has at least one post_type = Variations rule - does not validate other rules
                if( $rule['param'] == 'post_type' && $rule['operator'] == '==' && $rule['value'] == 'product_variation' ) {
                    // Render field Group
                    acf_render_fields( $variation->ID, acf_get_fields( $acf_field_group ) );
                    break 2;
                }
            }
        }
    }
    
    // Remove filter
    remove_filter( 'acf/prepare_field', 'acf_prepare_field_update_field_name' );
}, 10, 3 );

// Filter function to update field names
function  acf_prepare_field_update_field_name( $field ) {
    global $wp_i;
    $field['name'] = preg_replace( '/^acf\[/', "acf[$wp_i][", $field['name'] );
    return $field;
}

###
# Save variation data
###
add_action( 'woocommerce_save_product_variation', function( $variation_id, $i = -1 ) {
    // Update all fields for the current variation
    if ( ! empty( $_POST['acf'] ) && is_array( $_POST['acf'] ) && array_key_exists( $i, $_POST['acf'] ) && is_array( ( $fields = $_POST['acf'][ $i ] ) ) ) {
        foreach ( $fields as $key => $val ) {
            update_field( $key, $val, $variation_id );
        }
    }
}, 10, 2 );

###
# Rebind the ACF events after the variations are loaded
###
add_action('acf/input/admin_footer', 'wp__acf_input_admin_footer');
function wp__acf_input_admin_footer() {
?>
    <script type="text/javascript">
      (function($) {
        $(document).on('woocommerce_variations_loaded', function () {
          acf.do_action('append', $('#post'));
        })
      })(jQuery);	
    </script>
<?php      
  }

This creates an option when setting up an ACF group, whereby you can then select the WooCommerce Variable product.
In my case, I’m then adding a gallery

Editing a product, if I expand the variable products, I can add/edit/save the images – no problems at all.

I then needed another ACF field for downloads. This is a file field linked to the post type Product (not variable!).

If I edit my product, add my download and save – all good!

If I edit my product in any way, then once I click save, the download file removes the attachment.

Am totally stumped!

Any help would be very much appreciated.
Thanks