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1. manuelmasia
   Member
   Posted 1 year ago #

   Hi, I use this function to paginate posts within categories:

   add_filter( 'pre_get_posts', 'number_of_posts' );
   function number_of_posts( $wp_query = '' ) {
   	remove_filter( 'pre_get_posts', 'number_of_posts' );
   	global $wp_query;
   	$cat_obj = $wp_query->get_queried_object();
   	$category_id = $cat_obj->term_id;
   	if ( is_category(3) ) {
   		$wp_query->query_vars['posts_per_page'] = 2;
   	} elseif( is_category(1)) {
   		$wp_query->query_vars['posts_per_page'] = 1;
   	}
   
   	return $wp_query;
   }

   It works very fine if permalinks are set on default. But, if I use %postname%, it doesn't work, and the number of displayed posts is the same of the global $posts_per_page set in "Settings / Reading"...

   Any idea?

   Thanks in advance!

2. manuelmasia
   Member
   Posted 1 year ago #

   Ok... I tryed another way:

   add_filter( 'pre_get_posts', 'number_of_posts' );
   function number_of_posts( $wp_query = '' ) {
   	remove_filter( 'pre_get_posts', 'number_of_posts' );
   	global $wp_query;
   	global $wpdb;
   	$cat_obj = $wp_query->get_queried_object();
   
   		if ( $wp_query->is_category ) {
   			if ( !($category_id = $wp_query->get('cat')) ) {
   				$category    = $wp_query->get('category_name');
   				$sqlstr  = "SELECT term_id FROM $wpdb->terms WHERE slug = '". $wpdb->escape($category) ."'";
   				$category_id = (int) $wpdb->get_var($sqlstr);
   				if ( $category_id==3 ) {
   				echo "<script>alert (".$category_id.");</script>";
   					$wp_query->query_vars['posts_per_page'] = 2;
   				} elseif( $category_id==1) {
   				echo "<script>alert (".$category_id.");</script>";
   					$wp_query->query_vars['posts_per_page'] = 1;
   				}
   			}
   			else  {
   				$category_id = $cat_obj->term_id;
   				if ( $category_id==3 ) {
   					$wp_query->query_vars['posts_per_page'] = 2;
   				} elseif( $category_id==1) {
   					$wp_query->query_vars['posts_per_page'] = 1;
   				}
   			}
   		}
   
   	return $wp_query;
   }

   But it still doesn't work. The strange thing:
   the alert() function works and display the category id.

   Please help...

3. manuelmasia
   Member
   Posted 1 year ago #

   Sorry... my fault! There was a conflict with another function... it works! But in the second way, not the first.

   Bye

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