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- require 'rubygems'
- require 'dm-core'
- require 'dm-constraints'
- DataMapper::Logger.new(STDOUT, :debug)
- DataMapper.setup(:default, 'mysql://localhost/dm_core_test')
- class Comment
- include DataMapper::Resource
- property :id, Serial
- property :name, String
- has n, :categories, :through => Resource, :constraint => :destroy!
- end
- class Category
- include DataMapper::Resource
- property :id, Serial
- property :name, String
- has n, :comments, :through => Resource, :constraint => :destroy!
- end
- DataMapper.auto_migrate!
- DataMapper.auto_migrate!
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