Custom Post Type Display Linked to Common Posts

Question

I created a custom post type and in it 4 posts, and called right in the code, I believe, only that they only appear when I leave some post created in post type Posts which is the standard of Wordpress.

<div class="all-recipe" >
    <div class="container-fluid">

        <div class="row">

            <?php 
                $args = array(
                    'post_type' => 'posts_blog',
                    'status' => 'publish',
                    'numberposts' => 4,
                    'order' => 'DESC',
                );
                $query = get_posts( $args );
            ?>

            <?php if (have_posts()) : foreach( $query as $post ) : setup_postdata ( $post ); ?>  
                <div class="col-md-3" style="padding: 0;">
                    <div class="recipe-posts-principais" style="background: url(<?php echo get_the_post_thumbnail_url(); ?>)">
                        <button>Click to fade in boxes</button><br><br>
                        <div class="block-infos" style="display: none">
                            <h1><?php the_title(); ?></h1>
                            <h3><?php the_author_posts_link(); ?></h3>
                            <span><?php the_time("d/m/Y"); ?></span>
                            <h1> <?php echo $meta['mensagem'][0]; ?> </h1>
                            <p> <?php echo $meta['descricao-humanidade'][0]; ?> </p>
                            <a href=" <?php the_permalink(); ?>">Saiba mais</a>
                        </div>
                    </div>
                </div> 
            <?php endforeach; endif; ?>
        </div>
    </div>
</div>

Answer 1

Your problem is here:

<?php if (have_posts()) : foreach( $query as $post ) : setup_postdata ( $post ); ?>

Which shows that your report is correct: only appear when I leave a post created in the post type Posts. If unspecified, have_posts() will do a search on the object of query global, not what you tried to specify just above. I say tried, since you did not explicitly do so. Although get_posts() make use of the WP_Query internally (see documentation), all other methods that this class provides will not be available, and that is exactly what you should do.

To do this, try mounting your query as follows:

$args = array(
    'post_type' => 'posts_blog',
    'status' => 'publish',
    'numberposts' => 4,
    'order' => 'DESC',
);

$query = new WP_Query( $args );

Thus, $query becomes a query object, not just a post object. To loop, you can ride

if ( $query->have_posts() ) {
    while ( $query->have_posts() ) {
        $query->the_post();
        # code ...
    }
    // Restaura o objeto de consulta
    wp_reset_postdata();
}

Writing your code this way, you remove the dependency of the existence of a post common.