public function getRelatedPosts($tags, $except = null)
{
$limit = 4;
$tag_ids = $tags->lists('tag');
$related = Posts::whereHas('tags', function ($q) use($tag_ids) {
$q->whereIn('tag', $tag_ids);
});
if (!empty($except)) {
$related = $related->where('id', '!=', $except);
}
$related = $related->active()->orderBy('created_at')->take($limit)->get();
//If posts not enough for maximum
if ($related->count() < $limit) {
$left = $limit - $related->count();
$excluded = $related->lists('id')->toArray();
$excluded[] = $except;
$additional = Posts::whereNotIn('id', $excluded)->active()->orderByRaw('RAND()')->limit($left)->get();
$related = $related->merge($additional);
}
return $related;
}