Rails应用出现uninitialized constant Group::GroupNotification错误求助

开发Rails应用配置Noticed通知功能时，遇到uninitialized constant Group::GroupNotification错误，已确认创建了GroupNotification类且为单数命名，不清楚错误原因，寻求解决办法。

相关代码 #

GroupNotification通知类 #

class GroupNotification < Noticed::Base
  # Add your delivery methods
  #
  deliver_by :database
end

Notification模型 #

class Notification < ApplicationRecord
  include Noticed::Model
  belongs_to :recipient, polymorphic: true
end

Group模型 #

class Group < ApplicationRecord
    #statement che associa un group all'utente che lo crea       

    belongs_to :user
    has_many :members
    has_many :roles
    has_many :partecipation
    
    #has_noticed_notifications param_name: :group, model_name: "Notification"

    after_create_commit :notify_recipient

    has_many :notifications, as: :recipient, dependent: :destroy

    before_destroy :remove_partecipation, if: :has_partecipation?
    before_destroy :cleanup_notifications



  private

  def notify_recipient
    GroupNotification.with(group: self).deliver_later(self.user)
  end

  def cleanup_notifications
    notifications_as_group.destroy_all
  end

错误信息 #

NameError in GroupsController#create
uninitialized constant Group::GroupNotification
Extracted source (around line #130):
128
129
130
131
132
133
              

  def notify_recipient
    GroupNotification.with(group: self).deliver_later(self.user)
  end

  private

排查及解决方法 #

• 检查文件路径：确保GroupNotification类的文件放在app/notifications/group_notification.rb，Rails约定通知类需放在app/notifications目录下，文件名对应类名的蛇形命名（GroupNotification → group_notification.rb），放错目录会导致自动加载失败。
• 强制全局常量查找：在Group类内部调用时，给类名加双冒号::，显式指定从全局命名空间查找，修改代码为：

  ::GroupNotification.with(group: self).deliver_later(self.user)
  

• 清理缓存并重启服务：开发环境下可能存在自动加载缓存问题，执行rails tmp:clear清理缓存，然后重启Rails服务器。
• 确认类名与文件名匹配：检查文件名是否为group_notification.rb（全小写、下划线分隔），类名是否为GroupNotification（驼峰式），两者不匹配会导致Rails无法正确加载类。

内容的提问来源于stack exchange，提问作者Alessia Volpi