Use dynamic queries with Oxygen's repeater

oxygen-repeater-dynamic-query.php

/*
 * Example of related posts repeater for any CPT with taxonomy:
 * - Filter query to prevent altering queries inside the repeater items,
 * - Retrieve post category slug : I have only one for each post, so I just take first element.
 *   (You might need to add error tests, of course, if you don't accept empty results,
 *    for instance if you forgot to set post category.)
 * - Set tax_query arg with category slug
 * - Set random order
 * - Exclude current post
 * - Deactivate pagination
 */

/* Put this in a code block just BEFORE the repeater */
<?php
function dynamic_category_query( $query ) {
  global $post;
  if ( $query->query['post_type'][0] == 'cpt_slug' ) {
    $cat = wp_get_post_terms( $post->ID , 'categorie_slug', array( 'fields' => 'slugs' ) )[0];
    $query->set( 'tax_query', array(
                                array(
                                  'taxonomy' => 'categorie_slug',
                                  'field' => 'slug', 
                                  'terms' => $cat,
                                  'include_children' => false
                                )
                              ) );
    $query->set( 'orderby', 'rand' );
    $query->set( 'post__not_in', array($post->ID) );
    $query->set( 'no_found_rows', true );
  }
}
add_action( 'pre_get_posts', 'dynamic_category_query' );
?>

/*
 * REPEATER (use custom query and set post type and number of posts per page as you wish)
 */

/* Put this in a code block just AFTER the repeater if you need to make other queries later on the page */
<?php
remove_action( 'pre_get_posts', 'dynamic_category_query' );
?>