Showing only one Primary category

Hi there,

You will likely need to create a shortcode with some PHP to get the primary category.

Let's try this:

add_shortcode( 'primary-category', function() {
    $cat = false;
    $primary_cat_id = get_post_meta( get_the_ID(), 'rank_math_primary_category', true );

    if ( $primary_cat_id ) {
        $cat = get_term( $primary_cat_id, 'category' );
        $cat_link = get_term_link( $primary_cat_id, 'category' );
    }
    
    if ( ! is_wp_error( $cat ) && ! is_wp_error( $cat_link ) ) {
        return '<span class="primary-category"><a href="' . $cat_link . '">' . $cat->name . '</a></span>';
    }
} );

Then add the [primary-category] shortcode into the Hero.

Let me know :)

Thanks for the help "Tom"
Unfortunately the shortcode does not work

Hi there,

Does nothing output at all?

What if you do this?:

add_shortcode( 'primary-category', function() {
    $product_cat = false;
    $primary_cat_id = get_post_meta( get_the_ID(), 'rank_math_primary_category', true );

    if ( $primary_cat_id ) {
        $product_cat = get_term( $primary_cat_id, 'product_cat' );
    }

    var_dump($product_cat);

    if ( $product_cat ) {
        return '<span class="primary-category">' . $product_cat->name . '</span>';
    }
} );

This error occurs

object (WP_Error) # 5759 (2) {["errors"] => array (1) {["invalid_taxonomy"] => array (1) {[0] => string (25) "invalid class." }} ["error_data"] => array (0) {}}

Aha, that explains it.

Try this updated code: https://generatepress.com/forums/topic/showing-only-one-primary-category/#post-1136469

Great works well
But it cannot be clicked as a link
Also
But css cannot be implemented

I just updated the function to include the link: https://generatepress.com/forums/topic/showing-only-one-primary-category/#post-1136469

You can use this class to style it: .primary-category

Sorry Tom
But the error appears
PHP Recoverable fatal error: Object of class WP_Error could not be converted to string
On the next line:
return '<span class="primary-category"><a href="' . $cat_link . '">' . $cat->name . '</a></span>';

Hmm, one more debug try:

add_shortcode( 'primary-category', function() {
    $cat = false;
    $primary_cat_id = get_post_meta( get_the_ID(), 'rank_math_primary_category', true );

    if ( $primary_cat_id ) {
        $cat = get_term( $primary_cat_id, 'category' );
        $cat_link = get_term_link( $primary_cat_id, 'category' );
    }

    var_dump($cat_link);
    
    if ( $cat ) {
        return '<span class="primary-category"><a href="#">' . $cat->name . '</a></span>';
    }
} );

What does that var_dump output? It should get the link to the term..

Let me know :)

Unfortunately, this error occurred

object (WP_Error) # 5775 (2) {["errors"] => array (1) {["invalid_term"] => array (1) {[0] => string (18) "is an empty element." }} ["error_data"] => array (0) {}}

Ok, can you try this?: https://generatepress.com/forums/topic/showing-only-one-primary-category/#post-1136469

If that doesn't work I'll install Rank Math and will debug.

Thanks!

Sorry, Tom, you are tired of me
It didn't work at all

No worries!

Just played with it - this should work:

add_shortcode( 'primary-category', function() {
    $cat = false;
    $primary_cat_id = get_post_meta( get_the_ID(), 'rank_math_primary_category', true );

    if ( $primary_cat_id ) {
        $cat = get_term( $primary_cat_id, 'category' );
        $cat_link = get_term_link( $cat, 'category' );
    }

    if ( ! is_wp_error( $cat ) ) {
        return '<span class="primary-category"><a href="' . $cat_link . '">' . $cat->name . '</a></span>';
    }
} );

Thank you Tom
It works perfectly
good job