Show specific posts with WP_Query using ACF Post object

Question

I need help with this one. What I want to do is to display specific posts of the custom post type. Everything working fine, just I can't display more than 1(one) post. doesn't matter how much posts I select it always return to me just one. Here is a full code

<?php

$post_objects = get_sub_field('choose_blocks');
$string = "";
if( $post_objects ): ?>

    <?php foreach( $post_objects as $post_object):

        $post_id = $post_object->ID;

        $string .= $post_id.',';


    endforeach; ?>

    <?php wp_reset_postdata(); // IMPORTANT - reset the $post object so the rest of the page works correctly ?>
<?php endif; ?>

<?php $string =  rtrim($string, ','); ?>

 <?php
     $args = array(
        'post_type'=>'presentations',
        'post_status'=>'publish',
        'post__in' => array( $string )
    );
?>
 <?php // the query
    $all_presentations = new WP_Query($args); ?>

    <?php if ( $all_presentations->have_posts() ) : ?>

        <?php while ( $all_presentations->have_posts() ) : $all_presentations->the_post(); ?>

            <?php get_template_part( 'includes/content', get_post_format() ); ?>

        <?php endwhile; ?>
        <!-- end of the loop -->


        <?php wp_reset_postdata(); ?>

    <?php else : ?>
       <!-- do nothing -->
    <?php endif; ?>

<?php endif; ?>

Answer 1

now we are getting there.. you really need to try to explain, what your problem is, its not very clear in your question.

my assumption is, you tried this one, but it didn't work out:

foreach( $post_objects as $post_object):
  get_template_part( 'includes/content', get_post_format( $post_object->ID ) );
endforeach;

and here is why: you call the template, but the global $post is still set to the previous post/page. you need to set the global $post variable as you do it later on in your code ($all_presentations->the_post();). it works differently, when you do it in a foreach and not with WP_Query(), but you can set the global $post variable when you hand and object of that post to setup_postdata. when you do that, you can call all the other functions, like the_title() or the_content() and wp will grab it from the object, that you provided.

here is how:

<?php
 /**
   * when you call the_title() here, it will return the title of the current post/page (global $post defined by main query)
   */
if( $post_objects ):
  foreach( $post_objects as $post): //!!the variable MUST be called $post
    setup_postdata($post); //set new $post_object
    /**
      * now we switched global $post, so the_title() will return other the contents of your $post_object
      */
    get_template_part( 'includes/content', get_post_format() );
  endforeach;
  wp_reset_postdata(); //reset global $post
endif;
?>

you need to call setup_postdata()on your obect, to use get_post_format(). see the docs for more info on setup_postdata.

Answer 2

Here is a solution, i need to returns an array of string. It's not enough to pass string in array()

<?php $arr = explode(',', $string); ?>

Full code

<?php

$post_objects = get_sub_field('choose_blocks');
$string = "";
if( $post_objects ): ?>

    <?php foreach( $post_objects as $post_object):

        $post_id = $post_object->ID;

        $string .= $post_id.',';


    endforeach; ?>

    <?php wp_reset_postdata(); // IMPORTANT - reset the $post object so the rest of the page works correctly ?>
<?php endif; ?>

<?php $string =  rtrim($string, ','); ?>


// THIS IS THAT I NEED TO GET IT WORK
<?php $arr = explode(',', $string); ?>


 <?php
     $args = array(
        'post_type'=>'presentations',
        'post_status'=>'publish',
        'post__in' => array( $string )
    );
?>
 <?php // the query
    $all_presentations = new WP_Query($args); ?>

    <?php if ( $all_presentations->have_posts() ) : ?>

        <?php while ( $all_presentations->have_posts() ) : $all_presentations->the_post(); ?>

            <?php get_template_part( 'includes/content', get_post_format() ); ?>

        <?php endwhile; ?>
        <!-- end of the loop -->


        <?php wp_reset_postdata(); ?>

    <?php else : ?>
       <!-- do nothing -->
    <?php endif; ?>

<?php endif; ?>