How to Create a Custom Views Argument Plugin in Drupal
When you're building a site, it's standard to set up "pretty URLs". For example, we'd rather see /catalog/accessories than /taxonomy/term/18 and we'd rather see /about-us than /node/19. With Drupal, we use the Pathauto module to configure these types of standard content paths. But in some cases, there's no option to create a nice URL pattern, so we end up seeing those URLs.