Type error

controller.rb

 def update
    @channel = current_user.channels.find(params[:id])
    # make sure channel isn't social
    #render :text => '' and return if @channel.social
    if params["channel"]["video_type"].blank? && !params["channel"]["video_id"].blank? 
      @channel.errors.add(:base, t(:channel_video_type_blank)) 
    end
    if @channel.errors.count <= 0
      puts "########## Params #{params.inspect}"
      @channel.save_tags(params[:tags][:name])
      @channel.update_attributes(params[:channel]) 
    else
      session[:errors] = @channel.errors
      redirect_to channel_path(@channel.id, :anchor => "channelsettings") and return
    end

    flash[:notice] = t(:channel_update_success)
    redirect_to channel_path(@channel.id) 

  end

spec.rb

 it "should allow a channel to be edited" do 
      @channel.public_flag = true
      puts "###### tags = #{@tag} "
      put :update, :id => @channel.id, :channel => @channel, :tags => @tag
      response.should redirect_to channel_path(@channel.id)       

    end