删掉user里的扩展表信息，防止第一次迁移失败

app/models/user.rb

@@ -209,10 +209,6 @@ class User < Principal
 
 
   # ======================================================================
-  # 集中处理 User 扩展表为空的问题
-  # 合并 user_score 属性
-  validate :valid_user_extensions
-  after_save :save_user_extensions
 
   def extensions
     self.user_extensions ||= UserExtensions.new
@@ -222,49 +218,6 @@ class User < Principal
     self.user_score ||= UserScore.new
   end
 
-  alias_method :ori_respond_to?, :respond_to?
-  def respond_to?(m, include_private = false)
-    flag = false
-    flag = ori_respond_to? m.to_sym unless flag
-    flag = UserExtensions.new.respond_to? m.to_sym unless flag
-    flag = UserScore.new.respond_to? m.to_sym  unless flag
-
-    flag
-  end
-
-  def method_missing m, *args, &block
-    if extensions.respond_to? m.to_sym
-      self.class.send(:define_method, "_meta_#{m}".to_sym) do |*args, &block|
-        self.extensions.__send__ m.to_sym, *args
-      end
-      __send__ "_meta_#{m}".to_sym, *args, &block
-
-    elsif user_score_attr.respond_to? m.to_sym
-       self.class.send(:define_method, "_meta_#{m}".to_sym) do |*args, &block|
-        self.user_score_attr.__send__ m.to_sym, *args
-      end
-      __send__ "_meta_#{m}".to_sym, *args, &block
-
-    else
-      super
-    end
-  end
-
-  def valid_user_extensions
-    if !self.extensions.valid?
-      self.extensions.errors.messages.each do |key, values|
-        values.each do |value|
-          self.errors.add key, value
-        end
-      end
-    end
-  end
-
-  def save_user_extensions
-    self.extensions.save
-    self.user_score_attr.save
-  end
-  # 集中处理 User 扩展表为空的问题 < end
   # ======================================================================
 
   #选择项目成员时显示的用户信息文字