コメント機能実装エラー

.main
  = form_for @comment, url:{controller: 'responses', action: 'create'}do |f|
    .main__consultation
      .main__consultation__title
        お悩み一覧
      .main__consultation__text
        = @toppage.contents
    .main__comment
      = f.text_area :comment, class: "main__comment__form"
      .main__comment__sent
        = f.submit "投稿する"
      .main__comment__text
        <コメント一覧>
      -if @comments　
        -@comments.each do |response|
          .main__comment__main
            .main__comment__main__name
              = response.user.name
            .main__comment__main__form
              = response.comment

class ResponsesController < ApplicationController
  def create
    @comment = Response.create(response_params)
    redirect_to "/top_page/#{comment.top_page.id}"
  end

  private
  def response_params
    params.require(:respons).permit(:comment).merge(user_id: current_user.id, top_page_id: params[:top_page_id])
  end
end

class TopPageController < ApplicationController
  def index
    @toppages = TopPage.all
  end

  def new
    @toppage = TopPage.new
  end

  def create
    TopPage.create(top_page_params)
    redirect_to top_page_index_path
  end

  def show
    @toppage = TopPage.find(params[:id])
    @comment = Response.new
    @comments = @toppage.responses.includes(:user)
  end

  private
  def top_page_params
    params.require(:top_page).permit(:contents,:name).merge(user_id: current_user.id)
  end
end