Caption filter requires manual re-save... sometimes

Support
#1

Hi,

I added a filter to automatically inject image captions as a data attribute on the front end. The filter works correctly, but I noticed that on older articles, the page needs to be re-saved from Cornerstone for the filter to take effect. Is there a better way to handle this?

We have a large number of articles (in French and English) and re-saving them all manually would be very time-consuming. I already tried clearing the Cornerstone cache but it did not change anything.

Here is the filter I added:

add_filter('cs_apply_image_atts', function($atts) {
if (!empty($atts['src'])) {
    $id = attachment_url_to_postid($atts['src']);
    if ($id) {
        $caption = wp_get_attachment_caption($id);
        if ($caption) $atts['data-caption'] = esc_attr($caption);
    }
}
return $atts;

});

Thank you for your help.