2009-10-06 72 views
6

是否可以指定參數:連接與條件類似?rails - :加入清理/替換

這裏有一個例子(SQL代碼無關)

named_scope :threads, { 
    :joins => [" LEFT JOIN groups_messages gm ON messages.id=gm.message_id AND gm.group_id IN (?) ",@group_ids_array], 
    :conditions => ["creator_id=? AND messages.id IN (?)", current_user_id, @message_ids_array] 
} 
在這個例子參數

:條件將得到正確插入,但:聯接我會得到一個錯誤

Association named ' LEFT JOIN groups_messages gm ON messages.id=gm.message_id and gm.group_id IN (?) ' was not found; perhaps you misspelled it? 

什麼函數替代參數:條件?

回答