WordPress：从next_post_link排除儿童帖子，仅保留父母

Question

Dear Stackoverflowers,

I'm having an issue using WP built-in functions : 'next_post_link' and 'previous_post_link' . My theme uses a custom post type "project" and every project post has children :

• Project 1
  • subpost 1
  • subpost 2
  • subpost 3
• Project 2
  • subpost 1
  • subpost 2
  • subpost 3
• ... etc

My problem is that when I use "next_post_link" , the button links to a child post (ex: subpost 1) . I want it to link only to a parent project item (ex: project 2).

<?php
query_posts('post_type=projet&post_status=publish&name='.$postname);
if (have_posts()) :
    while (have_posts()) :
        the_post();
        global $post;
        previous_post_link(); // output a link to a sub-project
        next_post_link(); // output a link to a sub-project
    endwhile;
endif;
?>

Answer 1

According to the codex , you can specify the next_post_link() to lead to the "next post in the current taxonomy term". Assign a category to your custom post type, maybe "projects" and try this:

<?php
query_posts('post_type=projet&post_status=publish&name='.$postname);
if (have_posts()) :
    while (have_posts()) :
        the_post();
        global $post;
        previous_post_link($in_same_cat = true, $taxonomy = 'project'); // output a link to a sub-project
        next_post_link($in_same_cat = true, $taxonomy = 'project'); // output a link to a sub-project
    endwhile;
endif;
?>