public static function prep($tags)
{
$results = Tag::where_in('tag_name', $tags)->get();
$output = array();
foreach ($results as $tag) {
$output[$tag->tag_name] = $tag;
}
foreach ($tags as $tag) {
if (!array_key_exists($tag, $output)) {
$tag = Tag::create(array('tag_name' => $tag));
$output[$tag->tag_name] = $tag;
}
}
return $output;
}
