[Resolved] Customize post output based on meta field

[Arthur]

I am loving the minimalist approach of GP!

I am trying to set a custom thumbnail size and hide the excerpt for posts, depending on a custom meta field (i.e. ‘meta-box-dropdown’ = ‘Tier 1’ or ‘meta-box-dropdown’ = ‘Tier 2’). I am trying to do so within functions.php using the code below. This however does not filter the posts successfully.

add_filter( 'generate_blog_image_attributes', function( $atts ) {
    if ( get_post_meta($postid, 'meta-box-dropdown', true) )  {
        $atts[ 'width' ] = 1900;
        $atts[ 'height' ] = 300;
        $atts[ 'crop' ] = false;
    }

    // Return our options
    return $atts;
} );

Any suggestions on how to approach?

[Arthur]

As a side note, I have three different loops on my front page. I would like the output of each loop to be different from the main loop. I was able to set up different loops but unsure how to manage the thumbnail sizes and fields within each loop.

/* CUSTOM LOOP FOR HERO POSTS - TIER 1*/

$args = array(
    'meta_key' => 'meta-box-dropdown',
    'posts_per_page' => 1,
    'meta_value' => 'Tier 1',
);

$tier1_query = new WP_Query($args);

if ( generate_has_default_loop() ) {

	if ( have_posts() ) :

		while ( $tier1_query->have_posts() ) :

			$tier1_query->the_post();

			get_template_part( 'content','tier1');

			//print get_post_meta( $post->ID, 'meta-box-dropdown', true );
			 
		endwhile;

		/**
		 * generate_after_loop hook.
		 *
		 * @since 2.3
		 */
		do_action( 'generate_after_loop', 'index' );

	else :

		generate_do_template_part( 'none' );

	endif;
}

[Tom]

Hi there,

1. It’s better to define a WordPress-created image size. Try this:

add_filter( 'generate_page_header_default_size', function( $size ) {
    if ( get_post_meta( get_the_ID(), 'meta-box-dropdown', true) ) {
        return 'my-custom-size';
    }

    return $size;
} );

More info here: https://docs.generatepress.com/article/generate_page_header_default_size/

2. Using a method similar to the above should work as long as the meta keys/values are different depending on the loop.

Let me know 🙂

[Arthur]

Perfect thank you Tom!

[Tom]

You’re welcome 🙂

[Arthur]

How would I make this image size apply to the post only on my homepage (index) page and not the post page?

[Arthur]

Sorry never mind, found the option in Customizer.

[Author]

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