Cache remember give wrong result?

It sounds like you're encountering a caching issue where the result of the Cache::remember method is not behaving as expected. This could be due to a variety of reasons, such as caching configuration, race conditions, or even issues with the underlying cache store.

Here are a few steps to troubleshoot and potentially resolve the issue:

1. Clear the Cache: Ensure that the cache is cleared before testing. Sometimes stale cache data can cause unexpected behavior.

   Cache::forget($cachekey);
   

2. Check Cache Configuration: Ensure that your cache configuration is set up correctly in config/cache.php. Make sure the cache store you are using (e.g., file, database, Redis) is properly configured and operational.

3. Debugging: Add more detailed logging to understand what's happening inside the closure. This can help you identify if the issue is with the query or the caching mechanism.

   public static function hasMessages($id) {
       $cachekey = self::getCacheString($id);
       \Log::channel('slackError')->error('Check for messages: ' . $id);
   
       return Cache::remember($cachekey, 10*60, function() use ($id) {
           $exists = (new \App\Models\ModeratorMessages)->where([
               ['recipient', '=', $id],
               ['seen', '=', 0]
           ])->exists();
           \Log::channel('slackError')->error('Query result for ' . $id . ': ' . ($exists ? 'true' : 'false'));
           return $exists;
       });
   }
   

4. Check for Race Conditions: If multiple requests are hitting this method simultaneously, it might cause race conditions. Ensure that the cache key is unique and properly scoped to avoid conflicts.

5. Alternative Cache Methods: If the issue persists, consider using other cache methods like Cache::put and Cache::get to have more control over the caching process.

   public static function hasMessages($id) {
       $cachekey = self::getCacheString($id);
       $cachedValue = Cache::get($cachekey);
   
       if ($cachedValue === null) {
           $exists = (new \App\Models\ModeratorMessages)->where([
               ['recipient', '=', $id],
               ['seen', '=', 0]
           ])->exists();
           Cache::put($cachekey, $exists, 10*60);
           return $exists;
       }
   
       return $cachedValue;
   }
   

6. Check Cache Store: Ensure that the cache store is not having issues. For example, if you're using Redis, make sure the Redis server is running and not experiencing connectivity issues.

By following these steps, you should be able to identify the root cause of the issue and resolve it. If the problem persists, consider providing more context or specific error messages that you encounter during debugging.