1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
require 'sqlite3'
require 'dm-core'
require 'dm-core/support/logger'
require 'dm-migrations'
class Animal
include DataMapper::Resource
property :id, Serial
property :name, String
property :notes, Text
end
class Ownership
include DataMapper::Resource
belongs_to :animal, :key => true
belongs_to :human, :key => true
end
class Human
include DataMapper::Resource
property :id, Serial
property :name, String
has n, :ownerships
has 1, :pet, :model => 'Animal', :through => :ownerships, :via => :animal
end
if 'irb' == $0
DataMapper.logger.set_log($stdout, :debug)
DataMapper.logger.auto_flush = true
end
|
