Trouble Excluding Categories on a Blog Page

[swc]

I need to exclude posts from certain categories on a post archive page. I'm using the blog page temple and all the posts show just fine. However, I want to exclude posts from the default Blog category. I'm attempting to do this using a filter on pre_get_posts that has the following line:

$query->set('cat', '-1');

However, those posts continue to be included in the posts listed. Is there something I'm missing that's causing Genesis to reset the category filter and include all posts? I'm doing this in a child theme. Is there another way I should be doing this?

http://samuelclough.com/resource-library

[emasai]

This is a piece of code by Brad Dalton that I have used to remove categories from showing:

//Exclude Posts In Category From Displaying On Blog Page Template 
add_action( 'pre_get_posts', 'remove_posts_in_category_on_blog' );
/**
* @author Brad Dalton - WP Sites 
* @example http://wpsites.net/web-design/exclude-category-posts-page/ 
*/
function remove_posts_in_category_on_blog( $query ) {
	
	global $wp_the_query;
	if( $wp_the_query === $query && $query->is_page('blog') ) {
		$query->set( 'cat', '-007' );
	}
 
}

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[swc]

In case anyone else has this problem, I found that because I was using the Genesis blog page template it actually overrides this because it specifically includes the blog category which is the one I was trying to exclude. The easiest solution is to simply add a custom field with the key query_args and the value cat=-1 (or whatever other category you want to eliminate).

[Author]

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