Profile: nicolaS-3

Problem: I have two nested Views set up to display a list of child posts. If no child posts are found, I would like to display "No items found" once. However, if I add the "No items found" message in the child View, it is repeated for each parent post. If I add it in the parent View, it is never shown because there are always parent posts.

Solution: There is not a simple way to set this up because each child View is rendered independently of the other child Views. There is no built-in way to keep a running total of all child posts across the nested Views, so a custom code solution in the classic Views editor is required. You must use a custom shortcode to add the number 1 each time a child post is displayed. Then use a conditional to test the total amount after all the child post loops have run.

First, add these two custom shortcodes in your child theme's functions.php file, or in a new custom code snippet in Toolset > Settings > Custom Code:

// https://toolset.com/forums/topic/not-found-message/
global $total;
function add_total_shortcode($atts, $content = '') {
  global $total;
 
  $total += wpv_do_shortcode($content);
}
 
add_shortcode('add-to-total', 'add_total_shortcode');
 
function show_total_shortcode( $atts, $content ) {
  global $total;
  $atts = shortcode_atts( array(
    'decimals' => 0
  ), $atts );
  $totalNew = $total;
  $total = 0;
  return number_format($totalNew, (int) $atts['decimals'] );
}
 
add_shortcode('show-total', 'show_total_shortcode');

Go to Toolset > Settings > Front-end Content and register show-total in Third-party shortcode arguments.

In your child View, insert the following code somewhere inside the wpv-loop tags:

[add-to-total]1[/add-to-total]

Then in the parent View, insert the following conditional shortcode somewhere outside the wpv-loop tags but inside the wpv-items-found shortcode:

[wpv-conditional if="( '[show-total][/show-total]' gte '1' )" evaluate="false"]
  There are NO child posts
[/wpv-conditional]

You may replace the text with your own custom message as needed.