ruby - 在创建之后和销毁之前做一些事情

Question

如何在创建 DataMapper 类的实例时执行 block ，并在销毁之前执行另一个 block ？

Answer 1

假设创建和销毁是指从数据库中插入和删除...

来自documentation

 class Post
   include DataMapper::Resource

   # ... key and properties here

   # This record will save properly
   before :create do |post|
     true
   end

   # But it will not be destroyed
   before :destroy do |post|
     throw :halt
   end
 end