def vote

    @post = Post.find(params[:post_id])
    temprating = @post.rating * @post.rating_count
    @post.rating_count = @post.rating_count + 1
    temprating = temprating + params[:rating].to_i
    temprating = temprating  / @post.rating_count
    @post.rating =  temprating.to_i
    respond_to do |format|
      if @post.save
        format.html { redirect_to @post, notice: 'Rating updated.' }
        format.json { render json: @post.rating  }
      else
        format.html { redirect_to @post, notice: 'Rating failed.' }
        format.json { render json: @post.errors }
      end
    end


  end