Remove excerpt from specific categories

Hi there,

Can you try in_category()?

You can take a look at the WordPress conditional tag here:
https://codex.wordpress.org/Conditional_Tags

Yeh, I had tried both of the below using in_category but it still shows the excerpt on posts from the sub-category (id=5).

add_filter( 'excerpt_length','tu_custom_excerpt_length', 1000 );
function tu_custom_excerpt_length( $length ) 
{
    // Return the normal length if we're not in this category
    if ( ! in_category('8') )
        return $length;

    global $wp_query; // assuming you are using the main query
    if ( 0 === $wp_query->current_post) {
        return $length;
    } else {
        return 0;
    }
}

add_filter( 'excerpt_length','tu_custom_excerpt_length', 1000 );
function tu_custom_excerpt_length( $length ) 
{
    // Return the normal length if we're not in this category
    if ( ! in_category( array( 8,5 ) )) 
        return $length;

    global $wp_query; // assuming you are using the main query
    if ( 0 === $wp_query->current_post) {
        return $length;
    } else {
        return 0;
    }
}

Just checking, are you using custom excerpt? If not then the there is another filter you can use.

Let me know :)

I'm using the excerpt options in the Customizer > Layout > Blog > Excerpt Word count = 50

Hmm can you try the conditional tag:
is_category( 5 ) || cat_is_ancestor_of( 5, get_query_var( 'cat' ) )
as suggested here?
https://codex.wordpress.org/Conditional_Tags#A_Category_Page

I'd actually also tried various versions of the below with no luck:

add_filter( 'excerpt_length','tu_custom_excerpt_length', 1000 );
function tu_custom_excerpt_length( $length ) 
{
    // Return the normal length if we're not in this category
    if ( ! is_category( 8 ) || cat_is_ancestor_of( 8, get_query_var( 'advice' ) )) 
        return $length;

    global $wp_query; // assuming you are using the main query
    if ( 0 === $wp_query->current_post) {
        return $length;
    } else {
        return 0;
    }
}

Was hoping Tom could take a look.

I wonder if this function would be better: https://codex.wordpress.org/Function_Reference/get_ancestors

Your check would be:

$ancestor_categories = get_ancestors( get_query_var( 'advice' ), 'category' );

if ( ! in_array( 8, $ancestor_categories ) ) {

}

Sorry Tom, so what would the full filter look like?.

Something like this maybe?:

add_filter( 'excerpt_length','tu_custom_excerpt_length', 1000 );
function tu_custom_excerpt_length( $length ) {
    $ancestor_categories = get_ancestors( get_query_var( 'advice' ), 'category' );

    // Return the normal length if we're not in this category
    if ( ! is_category( 8 ) && ! in_array( 8, $ancestor_categories ) ) 
        return $length;

    global $wp_query; // assuming you are using the main query
    if ( 0 === $wp_query->current_post) {
        return $length;
    } else {
        return 0;
    }
}

That looked promising but still not working :s

Can you try the adjusted function above?

Sorry, still no change unfortunately.

Can you link me to a page where that condition should take effect?

Hi Tom,
I've edited my thread with a temporary public URL, it will only be live for 8hrs.

Thanks.