[Resolved] Next / Previous Post based within category

[Michael]

Ok.. bordering on out of my depth, but after looking into it.. I found the category for the CPT is wpdmcategory

So I tried..

add_filter( 'generate_post_navigation_args', function( $args ) {
    if ( is_singular( 'wpdmpro' ) ) {
        $args['taxonomy'] = 'wpdmcategory';
    }

    return $args;
} );

No output, did I do this correctly ?

[Tom]

That’s the custom taxonomy name?

Can you post the full set of functions (related to this) that you’re using now?

[Michael]

add_filter( 'generate_post_navigation_args', function( $args ) {
    if ( is_singular( 'wpdmpro' ) ) {
        $args['taxonomy'] = 'wpdmcategory';
    }

    return $args;
} );

And the one to stay in category

add_filter( 'generate_category_post_navigation', 'mike_stay_category' );
function mike_stay_category()
{ 
    return 'true';
}

The other one for the normal nav with the thumbnails is disabled.

[Tom]

So instead of those two, try this:

add_filter( 'generate_post_navigation_args', function( $args ) {
    if ( is_singular( 'wpdmpro' ) ) {
        $args['taxonomy'] = 'wpdmcategory';
        $args['in_same_term'] = true;
    }

    return $args;
} );

So this is telling the post navigation to only display links in the same term within that custom taxonomy. It will only work if that taxonomy name is correct and if other posts exist in the same term.

Out of curiosity, does the post navigation display without same term stuff?

[Michael]

Nothing displaying there with or without the same terms stuff. It is strange this.

I’ve looked on their support for anything relating to next previous, and all I can find is where they disable it for someone, by creating a custom single.php and removing the nav code. They then rename it to wpdm-single.php which it must look for in terms of customisation. Implies nav must be standard ?

Am flummoxed.

[Michael]

If you want a login, I can send one if you want to see if you can spot anything ?

[Tom]

You’ll need this as well to tell GeneratePress to include the post meta on the CPT:

add_filter( 'generate_footer_meta_post_types', function( $types ) {
    $types[] = 'wpdmpro';

    return $types;
} );

Anything happen with the above code only added (other functions commented out)?

[Michael]

Yes !!

Am now getting navigation (and tags) , but not in the same category by the looks of things.

https://prnt.sc/ukmjn5

[Tom]

Now add this:

add_filter( 'generate_post_navigation_args', function( $args ) {
    if ( is_singular( 'wpdmpro' ) ) {
        $args['taxonomy'] = 'wpdmcategory';
        $args['in_same_term'] = true;
    }

    return $args;
} );

[Michael]

Looking good, I didn’t know whether to delete the other one, but I just added this.. I have the previous and next in same category, but seem to be the wrong way round.. ie the one on the right is the previous one on the list. I can live with that .. can I get thumbs .. and I know asking a lot, just a title central above them to indicate to user what these links are. Or even just some text saying previous next download (as well as titles).

Tom, this is excellent, thank you so much.

[Michael]

Oh forgot, can I enable the function for the regular posts alongside this as well now (currently disabled)

[Tom]

This code you shared last page should add thumbs:

add_filter( 'generate_post_navigation_args', function( $args ) {
    if ( is_single() ) {
        $prevPost = get_previous_post(true);
        $prevThumbnail = isset( $prevPost ) ? get_the_post_thumbnail( $prevPost->ID ) : '';
        $nextPost = get_next_post(true);
        $nextThumbnail = isset( $nextPost ) ? get_the_post_thumbnail( $nextPost->ID ) : '';

        $args['previous_format'] = '<div class="nav-previous">' . $prevThumbnail . generate_get_svg_icon( 'arrow' ) . '<span class="prev" title="' . esc_attr__( 'Previous', 'generatepress' ) . '">%link</span></div>';
        $args['next_format'] = '<div class="nav-next">' . $nextThumbnail . generate_get_svg_icon( 'arrow' ) . '<span class="next" title="' . esc_attr__( 'Next', 'generatepress' ) . '">%link</span></div>';
    }

    return $args;
} );

How are they turned on on single posts right now?

[Michael]

Thanks, that got the thumbnail nav back to the regular posts, but they disappeared from the CPT. The post navigation is turned on via the customiser settings.

[Tom]

The code above removed the post navigation from the CPT completely?

[Michael]

Hi Tom,

Am getting confused.. there were 4 functions..

The keep in category one enabled

The first and second CPT functions you posted.

The thumbnail function.

I thought the second CPT one you sent was to be used instead of the first CPT one you sent, so I disabled the first function. That stopped the output at the CPT areas. After enabling both CPT functions I now get back the post nav in the custom post area (with thumbs) but they’re from different categories.

I wasn’t sure which CPT function I had to keep, so now they’re both active. almost there with this .. just need a way to keep the CPT to the same category, and if possible add some kind of text above the previous and next to indicate that’s what they are at a glance (if possible). Am sure I could write add a hook or something, but would make more sense (lighter) if that was included with the next/previous function.

Appreciate your work on this, didn’t realise it was going to be so tricky.

[Author]

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