def new
      @tag = Tag.new

      respond_to do |format|
        format.html # new.html.erb
        format.json { render json: @tag }
      end
    end
def new
      @tag = Tag.new

      respond_to do |format|
        format.html # new.html.erb
        format.json { render json: @tag }
      end
    end
GET /tags/new
 GET /tags/new.json