如何设置ActiveStorage以同时允许公共附件和私有附件

gem 'activestorage'

rails active_storage:install
rails db:migrate

class Post < ApplicationRecord
  has_one_attached :public_attachment
  has_one_attached :private_attachment
end

<%= form_with(model: @post, local: true) do |form| %>
  <%= form.file_field :public_attachment %>
  <%= form.file_field :private_attachment %>
  <%= form.submit %>
<% end %>

def create
  @post = Post.new(post_params)
  if @post.save
    redirect_to @post
  else
    render 'new'
  end
end

private

def post_params
  params.require(:post).permit(:title, :content, :public_attachment, :private_attachment)
end

<%= link_to 'Public Attachment', @post.public_attachment.url %>
<%= link_to 'Private Attachment', @post.private_attachment.url %>