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List category posts
Exclude Categories by Name (3 posts)

  1. mbarbee
    Member
    Posted 1 year ago #

    The other notes section:
    "
    name - To display posts from a category using the category's name or slug. Ex: [catlist name=mycategory]

    id - To display posts from a category using the category's id. Ex: [catlist id=24]. You can include several categories: Ex: [catlist id=17,24,32] or exclude a category with the minus (-)
    "

    I needed to exclude a category by name, since ids are no longer easily displayed. (eg [catlist name=cat1,cat2,-cat3])

    I have discovered changing the code in the foreach loop in CatList.php near line 92 to:

    "

    foreach ($cat_array as $category) {
                        $id='';
                        if(strpos($category, '-')===0){
                            $id='-';
                        }
                        $id .= $this->get_category_id_by_name($category);
    
                        $categories .= $id . ",";
                    }

    "
    carries the negative sign indicated in the parameters into the $args array.

    Thank you for your hard work, and easy-to-read code.
    I hope this helps.
    -MB

    http://wordpress.org/extend/plugins/list-category-posts/

  2. Web2Guru
    Member
    Posted 1 year ago #

    +1 for wanting this feature.

    The code has changed since this was posted, it is now in two places, near lines 143 and 154. Here is the full if/else block in that area, with the modifications (MOD) shown:

    if (preg_match('/\+/', $this->params['name'])):
            $categories = array();
            $cat_array = explode("+", $this->params['name']);
            foreach ($cat_array as $category) :
              // $id = $this->get_category_id_by_name($category); // MOD - replaced with the following mod
              // MOD
              $id='';
              if(strpos($category, '-')===0){
                $id='-';
              }
              $id .= $this->get_category_id_by_name($category);
              // MOD END
              $categories[] = $id;
            endforeach;
            $this->lcp_category_id = $categories;
    
          elseif (preg_match('/,/', $this->params['name'])):
            $categories = '';
            $cat_array = explode(",", $this->params['name']);
    
            foreach ($cat_array as $category) :
              // $id = $this->get_category_id_by_name($category); // MOD - replaced with the following mod
              // MOD
              $id='';
              if(strpos($category, '-')===0){
                $id='-';
              }
              $id .= $this->get_category_id_by_name($category);
              // MOD END
              $categories .= $id . ",";
            endforeach;
    
            $this->lcp_category_id = $categories;
    
          else:
            $this->lcp_category_id = $this->get_category_id_by_name($this->params['name']);
          endif;
  3. Web2Guru
    Member
    Posted 1 year ago #

    It has come to my attention that the first part of this mod could be confusing. In order to have posts that are in all the specified categories except posts that are in other specified categories (your using + and not ,) you need to use +- before the category to exclude.

    Here are some examples:

    // Given example (AND)
    // Only gets posts that are in both categories (+ = AND)
    [catlist name=category1+category2]
    
    // Given example (OR)
    // Gets posts that are in either categories
    [catlist name=category1,category2]
    
    // Mod example (AND, EXCEPT)
    // Get posts in either category-a OR category-b
    // but not posts that are is also in category-c
    [catlist name=category1,category2,-category3]
    
    // Mod example (OR, EXCEPT)
    // Get posts in both category-a AND category-b
    // but not posts that are is also in category-c
    [catlist name=category1+category2+-category3]

    I have not tested the AND shortcode, but it should work. Correct me if I am wrong.

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