RBOnRails-learning/app/controllers/comments_controller.rb

class CommentsController < ApplicationController
  before_action :require_user

  def create
    @article = Article.find(params[:article_id])
    @comment = @article.comments.new(comment_params)
    @comment.commenter = current_user.username

    if @comment.save
      flash[:notice] = "Comment added successfully."
    else
      flash[:alert] = "Failed to add comment."
    end

    redirect_to article_path(@article)
  end

  def destroy
    @article = Article.find(params[:article_id])
    @comment = @article.comments.find(params[:id])
    if @article.user_id == current_user.id || @comment.commenter == current_user.username
      @comment.destroy
    end
    redirect_to article_path(@article), status: :see_other
  end

  private
    def comment_params
      params.require(:comment).permit(:body, :status)
    end
end