Display related posts using specific tag via taxonomy custom field

• 

  • him

  • April 15, 2015 at 6:29 pm

  Hi,

  I have a CPT template working fine for a destination cpt. I want to display related posts at the bottom of the pages using tags. I enabled post_tag in my taxonomy in functins.php and I am able to add a tag on each of the destination edit page. Then I added a taxonomy field named ‘related_places_by_tag’ in my field group. And I am able to select a tag on the edit post template field. This way, all destination posts with a specific tag, say campsite, will display at the bottom like related posts.

  But I don’t know how to use this field <?php the_field('related_places_by_tag'); ?> while querying the posts in the template to show the tagged posts.

  Using it like this does not work:

  <?php 
  
  						$posts = get_posts(array(
  							'posts_per_page'	=> -1,
  							'post_type'			=> 'post',
  							'tag'               => <?php the_field('related_places_by_tag'); ?>
  						));
  
  						if( $posts ): ?>
  							
  							<ul>
  								
  							<?php foreach( $posts as $post ): 
  								
  								setup_postdata( $post )
  								
  								?>
  								<li>
  									<a href="<?php the_permalink(); ?>"><?php the_title(); ?></a>
  								</li>
  							
  							<?php endforeach; ?>
  							
  							</ul>
  							
  							<?php wp_reset_postdata(); ?>
  
  						<?php endif; ?>
• 

  • him

  • April 17, 2015 at 4:35 pm

  I tried using this code which I found here :

  
  <?php
  							$tagValue = get_field('related_places_by_tag');
  							$args=array(
  							'tag_id' => $tagValue,
  							'posts_per_page'=>6 // Number of related posts to display
  							);
  							$my_query = new wp_query( $args );
  							while( $my_query->have_posts() ) {
  							$my_query->the_post();
  							?>
  							<div>
  							<a href="<? the_permalink()?>">
  							<?php the_title(); ?>
  							</a>
  							</div>
  							<?php }  
  							wp_reset_query();
  						?>

  Though it does not break the template, it doesn’t work.
• 

  

  • James

  • April 11, 2016 at 7:41 pm

  Hi @him,

  Thanks for the post.

  In your use case, don’t you think it would be easier to use a post object field or a Relationship field instead?

  Here are links to the resource pages: http://www.advancedcustomfields.com/resources/relationship/ and https://www.advancedcustomfields.com/resources/post-object/
• 

  • him

  • April 12, 2016 at 4:37 pm

  Thanks James, I had totally forgotten that I had raised the topic here. I have since found the solution and its working perfectly well. Here’s the code I am using for reference:

  <div class="post">
  						
  						<?php 
  
  						$relatedd = get_field('related');
  
  						?>
  						<?php if( $relatedd ): ?>
  							
  							<?php foreach( $relatedd as $related ): ?>
  								
  									<div class="post-image related">
  									
  									<?php if (has_post_thumbnail($related->ID) ) : ?>
  									<?php echo get_the_post_thumbnail($related->ID, 'tab-small'); ?>
  									<?php endif; ?>
  
  									</div><!-- .post-image -->
  									
  									<div class="post-content">
  									<h3><a href="<?php echo get_permalink( $related->ID ); ?>">
  										<?php echo get_the_title( $related->ID ); ?>
  										 <?php /* echo wp_trim_words( get_the_title( $related->ID ), 01, '...' ); // trim the words in a title to first word */ ?> 
  									</a></h3>
  									<?php echo custom_field_excerpt( $related->ID ); ?>
  									</div><!-- .post-content -->
  								
  							<?php endforeach; ?>
  							
  						</div><!-- .post -->

  The above code works in the CPT page template and in addition here is the code for the functions.php:

  function custom_field_excerpt($related_post_id) {
  	global $post;
  	$text = get_field('introduction', $related_post_id );
  	if ( '' != $text ) {
  		$text = strip_shortcodes( $text );
  		$text = apply_filters('the_content', $text);
  		$text = str_replace(']]>', ']]>', $text);
  		$excerpt_length = 70; // 20 words
  		$excerpt_more = apply_filters('excerpt_more', ' ' . '[...]');
  		$text = wp_trim_words( $text, $excerpt_length, $excerpt_more );
  	}
  	return apply_filters('the_excerpt', $text);
  }

  The above code shortens the text from the Introduction field and uses it in related posts.

  Hope it is useful for anybody looking for similar solution.