如何使用命名空间中的模型执行has_many

module MyNamespace
  # Your code here
end

module MyNamespace
  class User< ApplicationRecord
    has_many :posts
  end

  class Post< ApplicationRecord
    belongs_to :user
  end
end

class CreatePosts< ActiveRecord::Migration[6.1]
  def change
    create_table :posts do |t|
      t.string :title
      t.text :content
      t.integer :user_id

      t.timestamps
    end
  end
end

user = MyNamespace::User.find(1)
posts = user.posts