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BOOK: Professional WordPress: Design and Development, 3rd Edition
This is the forum to discuss the Wrox book Professional WordPress: Design and Development, 3rd Edition by Brad Williams, David Damstra, Hal Stern; ISBN: 978-1-118-98724-7
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Old May 11th, 2016, 05:10 PM
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Default slider custom post examples

Hi,
I followed the example in the book for creating a custom slider and had some issues with custom post types registering which resulted in a
Fatal error: Call to a member function have_posts() on null
using this piece of code:

Code:
<?php 
	$args = array(
			    'posts_per_page' => '-1',
			    'post_type' => 'slides',
					);
	$mySlides = new WP_Query( $args );
				
	while ( $myslides -> have_posts() ) : $myslides -> the_post();
				?>
	<a href="<?php the_permalink(); ?>"><?php the_title(); ?>slides</a><br />
	<?php endwhile;
				
				//reset postdata
				wp_reset_postdata();
				?>
What does the error mean exactly?
I've set up a custom post type as the book states?
I've relinquished using global variables?

Any tips pointers?
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