I have a custom post type called debate and I want to create some custom fields just on this post type. So, I have this code:

function debate_comment_fields( $fields ) {

   if( is_singular( 'debate' ) ) {


    $fields['options'] = '<p class="comment-form-options"><label for="options">' . __( 'I want to' ) . '</label>' .
        '<input id="first" name="category" type="radio" value="' . get_post_meta(get_the_ID(), 'agree', true) .'" />'. 
        '<input id="second" name="category" type="radio" value="' . get_post_meta(get_the_ID(), 'disagree', true) .'" /></p>';

         return $fields;


Everything is ok on my custom post type, but on the default blog post type the author,email and url are not displayed.

Any idea why?

1 Answer 1


Yes, alter the single-debate.php and call a custom comment template using comment_template with a parameter, representing your custom comment template.

// If comments are open or we have at least one comment, load up the comment template
if ( comments_open() || '0' != get_comments_number() )
  • 2
    thanks for this, but is not relevant for what I'm asking for...
    – agis
    Commented Oct 31, 2013 at 16:48
  • 1
    in functions.php the line if( is_singular( 'debate' ) ) { does not make sense. its only for the template that you are viewing seeis_singular. first register the custom fields in functions php. then show them in the template.
    – user9
    Commented Oct 31, 2013 at 18:11
  • 1
    ok, do you have any suggestion on how can I make this work just on that specific post type ?
    – agis
    Commented Oct 31, 2013 at 18:13
  • 1
    why not check out the plugin above, it seems that would be easiest. i can not test it now unfortunately. but there are many tutorials, see maybe this thread
    – user9
    Commented Oct 31, 2013 at 18:17
  • 1
    I don't think you understand exactly what I need. That thread is about something else, the plugin is also about something different. All I need is just a function,conditional to display those custom comment fields on a specific custom type which is already created.
    – agis
    Commented Oct 31, 2013 at 18:44

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