ActiveRecord錯誤：缺少表「用戶」的FROM子句條目

Question

我正在使用User.delete_at在我的應用程序中啓用用戶軟刪除。當設置該字段時，我不希望刪除的用戶在整個應用中返回。所以我設置了以下給出我有以下型號：

User.rb 
    has_many :groups, :through => :group_members, :conditions => ['banned = ?', false] 
    default_scope :conditions => 'users.deleted_at IS NULL' 

Group.rb 
    belongs_to :user 
    has_many :group_members, :dependent => :destroy, :include => :user, :conditions => ['banned = ?', false] 

GroupMember.rb 
    belongs_to :group 
    belongs_to :user 
    default_scope joins(:user).where('users.deleted_at IS NULL') 

那麼現在的問題是，當我運行：

current_user.groups 

我收到以下錯誤：

Group Load (0.5ms) SELECT "groups".* FROM "groups" INNER JOIN "group_members" ON "groups"."id" = "group_members"."group_id" WHERE "group_members"."user_id" = 1 AND (users.deleted_at IS NULL) AND (banned = 'f') 
PG::Error: ERROR: missing FROM-clause entry for table "users" 
LINE 1: ..."group_id" WHERE "group_members"."user_id" = 1 AND (users.dele... 

有一個更好的方式使User.delete_at用戶不會被返回到整個應用程序？由於

Answer 1

我覺得你

.where('users.deleted_at IS NULL') 

條件應該是：在模型組has_many條件...