Created
February 19, 2012 11:02
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Gist showing nested/self-referential model
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class Folder | |
include DataMapper::Resource | |
has n, :subfolders, 'Folder' | |
has n, :messages | |
belongs_to :parent, :model => 'Folder', :required => false | |
belongs_to :owner, :model => 'User', :key => true | |
property :id, String, :key => true | |
property :name, String | |
property :special, String | |
end | |
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#!/usr/bin/env ruby | |
# | |
# Not quite as elegant, but brute force seems to work. | |
require 'rubygems' | |
require 'dm-core' | |
require 'dm-migrations' | |
# setup the logger | |
DataMapper::Logger.new($stdout, :debug) | |
# connect to the DB | |
DataMapper.setup(:default, 'sqlite3::memory:') | |
class User | |
include DataMapper::Resource | |
has n, :folders, :child_key => [:owner_address] | |
property :address, String, :key => true, :required => true | |
property :name, String | |
end | |
class Folder | |
include DataMapper::Resource | |
property :id, String, :key => true | |
property :name, String | |
property :special, String | |
property :owner_address, String, :key => true, :required => true | |
has n, :subfolders, 'Folder', :child_key => [:parent_id, :owner_address] | |
belongs_to :parent, 'Folder', :required => false, :child_key => [:parent_id, :owner_address] | |
belongs_to :owner, 'User', :key => true, :child_key => [:owner_address] | |
end | |
DataMapper.finalize.auto_migrate! | |
u = User.create(:address => 'a@b.c') | |
f = Folder.create(:id => 'test', :owner => u) | |
sf = Folder.create(:id => 'example', :owner => u, :parent => f) | |
__END__ | |
~ (0.000102) SELECT sqlite_version(*) | |
~ (0.000234) DROP TABLE IF EXISTS "users" | |
~ (0.000053) PRAGMA table_info("users") | |
~ (0.000435) CREATE TABLE "users" ("address" VARCHAR(50) NOT NULL, "name" VARCHAR(50), PRIMARY KEY("address")) | |
~ (0.000076) DROP TABLE IF EXISTS "folders" | |
~ (0.000041) PRAGMA table_info("folders") | |
~ (0.000309) CREATE TABLE "folders" ("id" VARCHAR(50) NOT NULL, "name" VARCHAR(50), "special" VARCHAR(50), "owner_address" VARCHAR(50) NOT NULL, "parent_id" VARCHAR(50), PRIMARY KEY("id", "owner_address")) | |
~ (0.000127) CREATE INDEX "index_folders_parent" ON "folders" ("parent_id") | |
~ (0.000102) INSERT INTO "users" ("address") VALUES ('a@b.c') | |
~ (0.000119) INSERT INTO "folders" ("id", "owner_address") VALUES ('test', 'a@b.c') | |
~ (0.000125) INSERT INTO "folders" ("id", "owner_address", "parent_id") VALUES ('example', 'a@b.c', 'test') |
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class User | |
include DataMapper::Resource | |
belongs_to :domain | |
has n, :folders | |
has n, :messages, :through => :folders | |
property :address, String, :key => true, :required => true | |
property :password, BCryptHash, :required => true | |
property :name, String | |
end |
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