尝试包含 class/object 关联时出现未初始化的常量错误

Question

我一直在尝试将 User 对象传递给变量并使用 includes 包含其 UserSettings 相关对象方法：

logged_user = User.includes(:user_settings).find_by(login: login)

但我不断收到以下错误：

"error": "uninitialized constant User::UserSettings"

这里是类' 的定义：

class UserSetting < ApplicationRecord
  belongs_to :user
end 

class User < ApplicationRecord

  has_one :user_settings, :class_name => 'UserSettings'
  has_many :sessions

  scope :active, -> { where(active: true) }

end

我做错了什么？

Answer 1

在

has_one :user_settings, :class_name => 'UserSettings'

尝试将关联复数 user_settings 更改为 user_setting 并且您可以删除 class_name 或将复数 UserSettings 删除为单数 UserSetting，就像这个：

has_one :user_setting, :class_name => 'UserSetting'

然后将 includes user_settings 更改为 user_setting

logged_user = User.includes(:user_setting).find_by(login: login)

我希望这对你有用。

尝试包含 class/object 关联时出现未初始化的常量错误

uninitialized constant error when trying to include class/object association

ruby

activerecord

ruby-on-rails