rails 级联删除

rails 级联删除

大家每天都有一个好心情 :)

  

rails cascade 级联删除[ruby]

 

用一次忘记一次，记下来。

:dependent - if set to :destroy all the associated objects are destroyed alongside this object by calling their destroy method. If set to :delete_all all associated objects are deleted without calling their destroy method. If set to :nullify all associated objects’ foreign keys are set to NULL without calling their save callbacks.

 

 

view plain print ?

1. belongs_to :xxx  
2. has_many :xxxxs , :foreign_key => :xxxx_id , :dependent => :destroy  
3. has_many :xxxxs, :dependent => :destroy  

2008-10-30 11:27:11-- 回复文章

posted on 2010-11-25 13:24  lexus 阅读( ...) 评论( ...) 编辑 收藏

转载于:https://www.cnblogs.com/lexus/archive/2010/11/25/1887552.html