search.php

<?php
function touteslesbox_fwp_archive_query( $query ) {    
                
        if ( is_admin() || ! $query->is_main_query() )
        return $query;  
        remove_filter('pre_get_posts', 'touteslesbox_fwp_archive_query', 1);

        
        if ( $query->is_post_type_archive( 'coupons' )  ) {

        // get all posts declare in the ACF repeater field option 
                if( have_rows( 'option_coupons_box_top','option' ) ) :  
                    $i = 0; $top_coupons_ID_array = array();
                    while( have_rows( 'option_coupons_box_top','option' ) ) : the_row();
                    $box = get_sub_field( 'box' ); $box_id = $box->ID;

          // for each post, I get the last "coupon" associated to the post (key=related_box)
                    $the_query = new WP_Query ( array ( 
                        'posts_per_page'        => 1,               
                        'orderby'               => 'date',
                        'post_type'             => 'coupons',
                        'meta_query'            => array( array( 'key' => 'related_box', 'value' => $box_id, 'compare' => '=' ) ),          
                        'post_status'           => 'publish',
                        'ignore_sticky_posts'   => 1,               
                    )); 
                    if ( $the_query->have_posts() ) : while( $the_query->have_posts() && ++$i ) : $the_query->the_post();
                      $top_coupons_ID_array[] = get_the_ID() ;
                        switch ( $i ) { default: case 4: break; }
            // if I get 4 "coupons", I stop the loop
                    endwhile; endif; wp_reset_postdata(); endwhile;
                    return $top_coupons_ID_array;               
                endif;  
            
                $query->set( 'posts_per_page',   14                                               );
                $query->set( 'post_status',       'publish'                                     );
                $query->set( 'orderby',             array ( 'date' => 'DESC' )  );
                    $query->set( 'post__in_not',      $top_coupons_ID_array             );              
                    $query->set( 'facetwp',             true                                                );
        
        
        }                   
        
        
        // Only noop our very specific rewrite rule match
        if ( 2 != count( $query->query ) || ! isset( $query->query['page'] ) ) {
            return;
        }
        // 'name' will be set if post permalinks are just post_name, otherwise the page rule will match
        if ( ! empty( $query->query['name'] ) ) {
            $query->set( 'post_type', array( 'post', 'page', 'test', 'box', 'actualites', 'coupons' ) );
        }
        
        
        add_filter( 'pre_get_posts', 'touteslesbox_fwp_archive_query', 1 );
        return $query;
    
    }