Do something after creating, and before destroying

Question

How can I have a block execute whenever an instance of a DataMapper class is a created, and another before it is destroyed?

Answer 1

Assuming by create & destroy you mean insert and remove from the db...

From the 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