具有设计的未知属性

Question

对于我的数据模型，我有两种不同的类型：家庭成员和朋友。我的计划是让每个人都有一个指向由 Devise 创建的用户表的外键。所以，当用户注册时，我希望他们要么去 /friends/sign_up 要么去 family_members/sign_up 。所以，我的朋友班是

class Friend < ActiveRecord::Base
  belongs_to :label
  belongs_to :user
  belongs_to :gender
  belongs_to :location
  belongs_to :orientation
  belongs_to :matchmaker

  def after_initialize
    self.build_user if self.user.nil?
  end
  #accepts_nested_attributes_for :user
  delegate :username, :to => :user
  delegate :email, :to => :user
  delegate :password, :to => :user
  delegate :password_confirmation, :to => :user
  delegate :rememebr_me, :to => :user

  # Include default devise modules. Others available are:
  # :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
  # Setup accessible (or protected) attributes for your model
  attr_accessible :username, :email,  :password, :password_confirmation, :remember_me
end

我的用户类是

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :token_authenticatable, :encryptable,     :confirmable, :lockable, :timeoutable and :omniauthable
#  devise :database_authenticatable, :registerable,
#         :recoverable, :rememberable, :trackable, :validatable

  attr_accessor :username, :email,    :password, :password_confirmation,   :remember_me
  # Setup accessible (or protected) attributes for your model
  attr_accessible :username, :email,   :password, :password_confirmation, :remember_me
end

我也在使用 Formtastic 作为我的视图。 现在，我得到了

unknown attribute: username

带参数

{"utf8"=>"✓", "authenticity_token"=>"8ScsJebuCWnflaRQkp9MsBuaaqfzQKaZBXotLyNwNyM=",
"friend"=>{"username"=>"aaaa",
"email"=>"aaa@aaa.com",
"password"=>"[FILTERED]",
"password_confirmation"=>"[FILTERED]"},
"commit"=>"Create Friend"}

现在，我只是随机尝试将nested_attributes 和其他任何东西添加到两个模型中。我可以使用表继承，但我不想这样做（除非我可以将外键添加到指向超类的子类，那很好）。

Answer 1

好的，我已经解决了我的问题，令我满意。这是我的新代码供将来参考：

class Friend < ActiveRecord::Base 
  belongs_to :friend_user, :class_name => 
end

class FriendUser < User
  set_table_name :users
  has_one :friend
end
class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :token_authenticatable, :encryptable,  :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  # Setup accessible (or protected) attributes for your model
  attr_accessible :username, :email,     :password, :password_confirmation, :remember_me
end

Answer 2

尝试将此添加到您的 Friend 模型中：

attr_accessible :username, :email,  :password, :password_confirmation, :remember_me

您是否尝试过这样做：

class User < ActiveRecord::Base
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
end

class Friend < User
  belongs_to :label
  belongs_to :user
  belongs_to :gender
  belongs_to :location
  belongs_to :orientation
  belongs_to :matchmaker
end

class FamilyMember < User
end

Answer 3

您确定在用户迁移中添加了“用户名”字段吗？设计不会自动添加。