Devise::RegistrationsController#create 中的 NameError：未定义的局部变量或方法 `confirmed_at`

Question

在此处输入图片描述我是 rails 的新手，我正在尝试设计为用户获取验证电子邮件

# user.rb:          
class User < ApplicationRecord
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
  :recoverable, :rememberable, :trackable,                                                      
  :validatable, :confirmable
end

# development.rb       
config.action_mailer.perform_deliveries = true
config.action_mailer.default_url_options = { host: ENV['MAIL_HOST'] }  
config.action_mailer.delivery_method = :smtp      
config.action_mailer.smtp_settings = {
  address: "smtp.gmail.com",
  port: 587,
  domain: ENV['MAIL_HOST'],
  authentication: "plain",
  enable_starttls_auto: true,
  user_name: ENV["GMAIL_USERNAME"],
  password: ENV["GMAIL_PASSWORD"] 
}
config.action_mailer.default_url_options = {:host => "localhost:3000"}

class AddConfirmableToDevise < ActiveRecord::Migration[5.2]
  def change
  end

  def up
    add_column :users, :confirmation_token, :string
    add_column :users, :confirmed_at, :datetime
    add_column :users, :confirmation_sent_at, :datetime
    # add_column :users, :unconfirmed_email, :string 
    # Only if using reconfirmable
    add_index :users, :confirmation_token, :unique => true
    # User.reset_column_information 
    # Need for some types of updates, but not for update_all.
    # To avoid a short time window between running the migration and updating all existing
    # users as confirmed, do the following
    User.update_all(:confirmed_at => Time.now)
    # All existing user accounts should be able to log in after this.
  end

  def down
    remove_columns :users, :confirmation_token, :confirmed_at,  :confirmation_sent_at
    # remove_columns :users, :unconfirmed_email # Only if using reconfirmable
  end
end

我得到的错误是

undefined local variable or method `confirmed_at' for # Did you mean? confirmed? the github repo is https://github.com/dinesh124/roughmart

Answer 1

你的列实际上并不存在于数据库中，因为你的迁移没有工作。

从迁移中删除 def change，它将覆盖 up/down。

或者，在 change 方法中添加列并删除 up/down。

Answer 2

您需要的列不在数据库中。

您应该删除迁移中的更改方法。但是您不能更改迁移并再次运行它。不会运行.

您应该回滚迁移，编辑迁移文件并再次运行。

检查这个解释问题的答案：

Devise::RegistrationsController#create 中的 NameError：未定义的局部变量或方法 `confirmed_at`

NameError in Devise::RegistrationsController#create: undefined local variable or method `confirmed_at`

ruby

email

ruby-on-rails

actionmailer

devise