Default validation criteria for a contextual filter can be wrong

Previously:

  /* Contextual filter: Inhalt: Author uid */
  $handler->display->display_options['arguments']['uid']['id'] = 'uid';
  $handler->display->display_options['arguments']['uid']['table'] = 'node';
  $handler->display->display_options['arguments']['uid']['field'] = 'uid';
  $handler->display->display_options['arguments']['uid']['default_action'] = 'default';
  $handler->display->display_options['arguments']['uid']['default_argument_type'] = 'user';
  $handler->display->display_options['arguments']['uid']['default_argument_options']['user'] = FALSE;
  $handler->display->display_options['arguments']['uid']['summary']['number_of_records'] = '0';
  $handler->display->display_options['arguments']['uid']['summary']['format'] = 'default_summary';
  $handler->display->display_options['arguments']['uid']['summary_options']['items_per_page'] = '25';
  $handler->display->display_options['arguments']['uid']['validate']['type'] = 'node';

After I found a fix:

  /* Contextual filter: Inhalt: Author uid */
  $handler->display->display_options['arguments']['uid']['id'] = 'uid';
  $handler->display->display_options['arguments']['uid']['table'] = 'node';
  $handler->display->display_options['arguments']['uid']['field'] = 'uid';
  $handler->display->display_options['arguments']['uid']['default_action'] = 'default';
  $handler->display->display_options['arguments']['uid']['default_argument_type'] = 'user';
  $handler->display->display_options['arguments']['uid']['default_argument_options']['user'] = FALSE;
  $handler->display->display_options['arguments']['uid']['summary']['number_of_records'] = '0';
  $handler->display->display_options['arguments']['uid']['summary']['format'] = 'default_summary';
  $handler->display->display_options['arguments']['uid']['summary_options']['items_per_page'] = '25';
  $handler->display->display_options['arguments']['uid']['specify_validation'] = TRUE;
  $handler->display->display_options['arguments']['uid']['validate']['type'] = 'user';
  $handler->display->display_options['arguments']['uid']['validate_options']['restrict_roles'] = TRUE;
  $handler->display->display_options['arguments']['uid']['validate_options']['roles'] = array(
    4 => '4',
  );

Note that the validation type 'node' is totally wrong. I'm not sure how it got into the view code but it was not easy to remove. It was not showing in the view settings. You should be able to replicate the problem with the above info. Note also that I should not have to specify validation criteria but this was the only way I could override the default 'node' value. Perhaps just deleting the 1 line code from my exported view could have also solved the problem.

In case it helps, my scenario was simply showing 1 content item based on a user ID. I used the Author uid contextual filter to show only the content item owned by that uid. URL was profile/%/view/profile (profile was my content type of which a user may only have 1 of).