Next / Prev link with thumbnail error

[Peter Knight]

Hi

I have a series of child pages with Next and Back thumbnails under each page.

Parent

- Child 1

- Child 2

- Child 3

- Child 4

I want Child page 1 to know it's the first page and not try to render a thumbnail.

Likewise, I want Child page 4 to know it's the last page etc...

My code works when I am not trying to call a thumbnail but as soon as I try to check for the existence of a previous or next page, my check fails.

<figure class="uk-overlay">
<?php 

//get the cropped thumbnail from the previous page
$image = $page->prev->Images->first()->getCrop('articlesquare');

// if there is a previous page, show a thumbnail                       
if($page->prev){
echo "<img src='{$image->url}' alt='{$image->description}' class='art-prev' />";

} else {

echo "";}
?>
                            
<div class="uk-overlay-panel uk-overlay-chevron-left"></div>
</figure>
                    
<a class="<?=$page->prev->id ? 'previous' : 'no-before'?>" href="<?php echo $page->prev->path; ?>"><?=$page->prev->title?></a>

Should I in fact be approaching this differently as the page is first looking for the existence of a cropped thumbnail?

[Peter Knight]

Solved with the help of Tom's question in 2012

I adapted it slightly to

<?php 
if ($page->prev->id) {
$prevThumb = $page->prev()->Images->first()->getCrop('articlesquare'); 

echo "
   <h3>Previous Article</h3>
   <figure class='uk-overlay'>
     <img src='{$prevThumb->url}' />
     <div class='uk-overlay-panel uk-overlay-chevron-left'></div>
   </figure>
								
   <a href='{$page->prev->url}'>{$page->prev->title}</a>
   ";}
?>