Adding a custom field to post navigation

  • Resolved chrispink

    (@chrispink)


    8 years, 7 months ago

    It would be great if I could add a custom field to my post navigation. I have a custom post type ‘courses’ and most of the listings are for courses with the same title so I would like to add the ACF field ‘date’ to the navigation label.

    There’s already a bit of code (I’ve hacked Big Blank rather than start from scratch -note to self, it doesn’t really save any time in the long run ) most of which is probably not used by me.

    function ala_post_nav() {
        // Don't print empty markup if there's nowhere to navigate.
        $previous = ( is_attachment() ) ? get_post(get_post()->post_parent) : get_adjacent_post(false, '', true);
        $next = get_adjacent_post(false, '', false);
        $is_last_page = '';
        if (!$next && !$previous) {
            return;
        }
        if (!$next) {
            $is_last_page = 'no-next';
        }
        ?>
        <nav class="navigation post-navigation <?php echo $is_last_page; ?>" role="navigation">
            <h1 class="screen-reader-text"><?php _e('Post navigation', 'ala'); ?></h1>
            <div class="nav-links">
                <?php
                if (is_attachment()) :
                    previous_post_link('%link', __('<span class="meta-nav">Published In</span>%title', 'ala'));
                else :
                    previous_post_link('%link', __('<span class="meta-nav">Previous Post</span>%title', 'ala'));
                    next_post_link('%link', __('<span class="meta-nav">Next Post</span>%title', 'ala'));
                endif;
                ?>
            </div><!-- .nav-links -->
        </nav><!-- .navigation -->
        <?php
    }
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  • Thread Starter chrispink

    (@chrispink)

    8 years, 7 months ago

    Unfortunately (maybe, maybe not) I have the bad habit of answering my own questions. So of anyone who treads this path, here’s the solution;

    function ala_post_nav() {
        // Don't print empty markup if there's nowhere to navigate.
        $prev = get_adjacent_post(false, '', true);

	    $next = get_adjacent_post(false, '', false);

        $is_last_page = '';
        if (!$next && !$prev) {
            return;
        }
        if (!$next) {
            $is_last_page = 'no-next';
        }

	   $prev_date = array(""); $next_date = array("");
       if ($next) { $next_date = get_post_custom_values( 'date', $next->ID ); }
       if ($prev) { $prev_date = get_post_custom_values( 'date', $prev->ID ); }

         ?>
        <nav class="navigation post-navigation <?php echo $is_last_page; ?>" role="navigation">
            <div class="nav-links">
                <?php
                    previous_post_link('%link', __('<span class="meta-nav">Previous Post</span>%title<br/>'.$prev_date[0], 'ala'));
					next_post_link('%link', __('<span class="meta-nav">Next Post</span>%title<br/>'.$next_date[0], 'ala'));
               ?>
            </div><!-- .nav-links -->
        </nav><!-- .navigation -->
        <?php
    }

    There’s probably a more elegant way of testing for the existence of the posts but this works.

Viewing 1 replies (of 1 total)
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