How to make a user-post-comment association?

Question

Ruby on Rails

I want to try to make the user-post-comment.post-comments association work, I figured it out. But what else would it all be tied to the user, I don’t understand. As I understand it, you need to add some kind of rule to the database and fix the action in posts controller and view. But I don't know what

class PostsController < ApplicationController
  def index
    @posts = Post.all
  end
  def new
    post = Post.new
  end

  def create
      post = Post.new(post_params)
      post.save
      redirect_to post 
  end

  def update
    post = Post.find(params[:id])
 
    if post.update(post_params)
    redirect_to post
    else
    render 'edit'
    end
    end

  def show
    post = Post.find(params[:id])
  end

  def destroy
    post = Post.find(params[:id])
    post.destroy

    redirect_to posts_path
  end

  private
    def post_params
    params.require(:post).permit(:title, :text)
  end
end

class Comment < ActiveRecord::Base
  belongs_to :post
  belongs_to :user
end

class Post < ActiveRecord::Base
  belongs_to :user
  has_many :comments
end

class User < ActiveRecord::Base
has_many :posts
has_many :comments
end

Answer 1

If you do this from the very beginning, everything will work.
user.rb

class User < ActiveRecord::Base
  has_many :posts
  has_many :comments
end

users_controller.rb

class UsersController < ApplicationController
  before_action :set_user, only: [:show, :edit, :update, :destroy]

  ...

  private
    def set_user
      @user = User.find(params[:id])
    end

    def user_params
      params.require(:user).permit(:name)
    end
end

----
rails g scaffold Post title body:text user:references
post.rb

class Post < ActiveRecord::Base
  belongs_to :user
  has_many :comments
end

posts_controller.rb

class PostsController < ApplicationController

  ...


    def post_params
      params.require(:post).permit(:title, :body, :user_id)
    end
end

posts/_form.html.erb
-----
rails g scaffold Comment body:text user:references post:references
comment.rb

class Comment < ActiveRecord::Base
    belongs_to :user
    belongs_to :post
 end

comments_controller.rb

class PostsController < ApplicationController

  ...


    def post_params
      params.require(:post).permit(:body, :user_id, :post_id)
    end
end

------

Answer 2

What's with the post controller? Something tells me that I need to CommentController::createadd CommentController::updatesomething similar to Comment.user = current_userbefore saving. Although I may not be right.

Answer 3

or immediately create from links, there are many options

def create
      post = current_user.posts.create(post_params)
      redirect_to post 
  end

def create
      post = current_user.posts << Post.create(post_params)
      redirect_to post 
  end

def create
              transaction do
                  post = Post.create(post_params)
                  post.user = current_user
                  post.save
              end    
      redirect_to post 
  end