Enhance query to include 'val' and skip empty values

Update the SQL query to fetch 'val' alongside 'user_id' and modify the logic to skip rows with empty 'val'. This ensures only relevant data is processed, improving data integrity and correctness.

services/nginx/app/objects/user_key_value_pairs_o.php

@@ -112,12 +112,16 @@ class user_key_value_pairs_o extends db
     {
         global $db;
         // Get all the users, and their customer numbers, with the given keys
-        $sql = "SELECT user_id FROM $this->table WHERE var IN ('" . implode("','", $keys) . "')";
+        $sql = "SELECT user_id, val FROM $this->table WHERE var IN ('" . implode("','", $keys) . "')";
         $result = $db->query($sql);
         $result = $db->fetch_all($result);
         $user_ids = [];
         // Add the user ids to the array
         foreach ( $result as $row ) {
+            // Check if the value is empty
+            if (empty($row['val'])) {
+                continue;
+            }
             $user_ids[] = (int)$row['user_id'];
         }
         // Get the customer numbers from the users table