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1. little_kostas
   Member
   Posted 1 year ago #
   

   Hello,
   i am using the following code in which i exclude specific categories.

   $recent = array(
     'posts_per_page' => 10,
     'cat=-1,-12,-13,-14,-15,-16,-17,-20,-195,-245,-203'
   );
   
   $recentPosts = new WP_Query($recent); ?>
   		<?php while ($recentPosts->have_posts()) : $recentPosts->the_post(); ?>
   //code for showing the posts
   <?php endwhile; ?>
   <?php wp_reset_query(); ?>

   The number of shown posts (10) work fine, i cant make it work the exclusion of the categories...

   Its seems really strange. Any sollutions??
   I have used the code from here: http://codex.wordpress.org/Class_Reference/WP_Query#Category_Parameters

   Thanks in advance
   Kostas

2. vjpo
   Member
   Posted 1 year ago #
   

   If to read the Codex page from your link attentively:
   'category__not_in' => array( 2, 6 )

3. little_kostas
   Member
   Posted 1 year ago #
   

   I think it works!
   Thanks vjpo!

   I have another question thow. I have many categories, and many subcategories in each category. I have inserted in the code above the main category i want to exclude, but it stil shows the posts of the subcategories of this category.

   Is there anything i can do in order not to insert all the subcategories by hand and only add the ID of the parent category???

   Thanks again!

4. vjpo
   Member
   Posted 1 year ago #
   

   There is a number of different solutions how to exclude automatically child categories from a query, but it's impossible to do by using only WP_Query parameters. What solution to use - it depends from the task.
   You can try also to use in WP_Query 'category__in'instead of 'category__not_in'.

5. little_kostas
   Member
   Posted 1 year ago #
   

   Yes this is one sollution.
   But if i create a new parent category, i will probably have to edit the code and add the categorys' ID in the 'category_in' function.

6. vjpo
   Member
   Posted 1 year ago #
   

   Automatic solution is possible, but where do you place this code (single.php, archive.php) what is the final task? I mean, are this categories related to the context they must be displayed?

7. little_kostas
   Member
   Posted 1 year ago #
   

   I am placing it in a custom page template. page-10.php. In this page i am displaying the 10 newest posts and some text at the top of it.

8. vjpo
   Member
   Posted 1 year ago #
   

   So, the context is static - always in page. In this situation this is maximal automation that came into my head. Almost nothing ))) It has any meaning if there is a lot of child categories.
   

   $exclude = array (1, 12, 13, 14);
   $child_categories=  get_categories('child_of=15');
   // add child of cat 15 to excluded categories
   foreach ($child_categories as $category) {
       $exclude[] = $category->term_id;
   }
   $recent = array( 'posts_per_page' => 10, 'category__not_in' => $exclude );

9. alchymyth
   The Sweeper & Moderator
   Posted 1 year ago #
   

   just an idea: try to loop through all to be excluded categories to catch all possible child cats:

   $exclude = array (1, 12, 13, 14);
   foreach( $exclude as $ex_cat ) {
     $child_categories=  get_categories('child_of='.$ex_cat);
     // add all childs of exclude cats to excluded categories
     if( $child_categories ) foreach ($child_categories as $category) {
       $exclude[] = $category->term_id;
     }
   }
   $recent = array( 'posts_per_page' => 10, 'category__not_in' => $exclude );

   (not tested)

10. vjpo
    Member
    Posted 1 year ago #
    

    Thanks, alchymyth! Nice improvement! Just tested - it works )

11. little_kostas
    Member
    Posted 1 year ago #
    

    You guys rock!!!

    Thank you very much!!!!!

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