向 User 和 Post 模型添加评论(Ruby on Rails) [英] Add Comment to User and Post models (Ruby on Rails)

问题描述

我是 Rails 的新手.我正在构建我的第一个应用程序 - 简单的博客.我有 User 和 Post 模型，每个用户可以写很多帖子.现在我想添加评论模型，每个帖子可以有很多评论，并且每个用户都可以评论任何其他用户创建的任何帖子.
在评论模型中我有

I'm new to Rails. I'm building my first app - simple blog. I have User and Post models, where each user can write many posts. Now I want to add Comment model, where each post can have many comments, and also each user can comment on any post created by any other user.
In Comment model I have

id \ body \ user_id \ post_id

列.
模型关联:
user.rb

has_many :posts,    dependent: :destroy
has_many :comments

post.rb

has_many :comments, dependent: :destroy
belongs_to :user

comment.rb

belongs_to :user
belongs_to :post

那么如何在 CommentsController 中正确定义创建操作?谢谢.

So how do I correctly define create action in CommentsController? Thank you.

更新:
路线.rb

resources :posts do
  resources :comments
end

comments_controller.rb

comments_controller.rb

  def create
    @post = Post.find(params[:post_id])
    @comment = @post.comments.create(comment_params)
    if @comment.save
      redirect_to @post
    else
      flash.now[:danger] = "error"
    end
  end

结果是

--- !ruby/hash:ActionController::Parameters
utf8: ✓
authenticity_token: rDjSn1FW3lSBlx9o/pf4yoxlg3s74SziayHdi3WAwMs=
comment: !ruby/hash:ActionController::Parameters
  body: test
action: create
controller: comments
post_id: '57'

正如我们所看到的，它不会发送 user_id 并且只有当我从 comment.rb 中删除 validates :user_id,presence: true 字符串时才起作用

As we can see it doesnt send user_id and works only if I delete validates :user_id, presence: true string from comment.rb

有什么建议吗?

推荐答案

你应该按照自己的方式来:

In your way you should put this:

def create
  @post = Post.find(params[:post_id])
  @comment = @post.comments.create(comment_params)
  @comment.user_id = current_user.id #or whatever is you session name
  if @comment.save
    redirect_to @post
  else
    flash.now[:danger] = "error"
  end
end

并且您还应该从 comment_params 中删除 user_id 作为强参数.希望这对你有帮助.

And also you should remove user_id from comment_params as strong parameters . Hope this will help you .

这篇关于向 User 和 Post 模型添加评论(Ruby on Rails)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！