Question

我的用户模型无法保存，因为password和password_confirmation不能为空。这种情况发生在：

在edit_user_registration上更新用户并将密码和密码确认留空。这是我第一次注意到的地方
在控制台上，加载对象后立即调用save。

如果使用password_required，将验证密码是否存在？

  validates_presence_of     :password, :if => :password_required?

  def password_required?
    !persisted? || !password.nil? || !password_confirmation.nil?
  end

这是我的rails控制台输出：

  Loading development environment (Rails 3.2.11)
  1.9.3p374 :001 > u = User.last
    User Load (1.0ms)  SELECT "users".* FROM "users" ORDER BY "users"."id" DESC LIMIT 1
   => #<User id: 9, name: "Name", email: "name@example.com", encrypted_password: "$2a$10$oCL2K0nEa8LxaMGuC1oyNOuwIHk8l/IOW.AylGcWTYj3...", reset_password_token: nil, reset_password_sent_at: nil, remember_created_at: nil, sign_in_count: 2, current_sign_in_at: "2013-02-06 20:56:14", last_sign_in_at: "2013-02-06 20:52:01", current_sign_in_ip: "127.0.0.1", last_sign_in_ip: "127.0.0.1", confirmation_token: nil, confirmed_at: "2013-02-07 22:04:01", confirmation_sent_at: "2013-02-07 22:03:25", unconfirmed_email: nil, authentication_token: nil, created_at: "2013-02-06 20:52:00", updated_at: "2013-02-07 22:04:31"> 
  1.9.3p374 :002 > u.save
     (0.2ms)  BEGIN
     (0.2ms)  ROLLBACK
   => false 
  1.9.3p374 :003 > u.errors
   => #<ActiveModel::Errors:0x007f832c04f090 @base=#<User id: 9, name: "Name", email: "name@example.com", encrypted_password: "$2a$10$oCL2K0nEa8LxaMGuC1oyNOuwIHk8l/IOW.AylGcWTYj3...", reset_password_token: nil, reset_password_sent_at: nil, remember_created_at: nil, sign_in_count: 2, current_sign_in_at: "2013-02-06 20:56:14", last_sign_in_at: "2013-02-06 20:52:01", current_sign_in_ip: "127.0.0.1", last_sign_in_ip: "127.0.0.1", confirmation_token: nil, confirmed_at: "2013-02-07 22:04:01", confirmation_sent_at: "2013-02-07 22:03:25", unconfirmed_email: nil, authentication_token: nil, created_at: "2013-02-06 20:52:00", updated_at: "2013-02-07 22:04:31">, @messages={:password=>["can't be blank"], :password_confirmation=>["can't be blank"]}> 
  1.9.3p374 :004 > !u.persisted? || !u.password.nil? || !u.password_confirmation.nil?
   => false

感谢您的帮助！

Answer 1

感谢@rainkinz，我回到了基础（用户模型）并仔细研究了一下。我发现我导入的模块正在添加一个额外的

validates :email, :password, :password_confirmation, presence: true

我能够通过在控制台中运行来看到这一点：

User.validators

 ...
 #<ActiveModel::Validations::PresenceValidator:0x007fb80fbcd260
   @attributes=[:email, :password, :password_confirmation],
   @options={}>,
 ...

这与设计放入的验证不同，其中包含：

@options={:if=>:password_required?}>,

删除那些解决了问题。谢谢你的帮助！

Answer 2

在更新方法中执行此操作。

user = User.find_by_id(params[:id])
    unless user.blank?
      if user.update_attributes(params[:user])
        flash[:notice] = "User updated successfully."
        redirect_to "somwhere"
      else
        render :action => 'edit'
      end
    else
      render :action => 'edit'
    end

如果您不想更新旧密码，请在更新前添加这些行，以便新代码为：

    user = User.find_by_id(params[:id])
        unless user.blank?
          params[:user].delete(:password) if params[:user][:password].blank?
          params[:user].delete(:password_confirmation) if params[:user][:password_confirmation].blank?
if user.update_attributes(params[:user])
            flash[:notice] = "User updated successfully."
            redirect_to "somwhere"
          else
            render :action => 'edit'
          end
        else
          render :action => 'edit'
        end

在user.rb模型中写下这样的东西

devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable, :locakable

Answer 3

我遇到了类似的问题，但是对我有用的解决方案是在完成我想做的事情之后，再次使用super调用devise的方法。例如：

def password_required?
  return false if some_check?
  super
end

此other answer的信用使我眼前一亮。

（设计）更新时需要密码，即使它是空白的

3 个答案: