1    if nsfw
   2      @items = Item.all(:limit => 10, :order => [:created_at.desc])
   3    else
   4      # this also excludes all items without any tag
   5      items_without_nsfw = Item.all(:limit => 10, :order => [:created_at.desc], :tags => {:tagname.not => 'nsfw'}) 
   6      # we need to include them afterwards:
   7      items_without_tags = Item.all(:limit => 10, :order => [:created_at.desc], :tags => nil)
   8      @items = (items_without_nsfw + items_without_tags).all(:limit => 10, :order => [:created_at.desc])
   9    end