standalone_example.rb

#!/usr/bin/env ruby
#
# A one file test to show ...
require 'rubygems'
require 'dm-core'


# setup the logger
DataMapper::Logger.new(STDOUT, :debug)

# connect to the DB
DataMapper.setup(:default, 'sqlite3::memory:')

class Person
  include DataMapper::Resource
  property :id, Serial
  property :email, String, :unique => true
  property :thing, Integer

  has n, :mailers # A Person sends mailers.
  has n, :conversations, :model => "Mailer", :through => Resource # A person receivers mailers.

end

class Mailer

  include DataMapper::Resource
  property :id, Serial
  property :subject, String
  property :body, Text
  property :sent_at, DateTime

  belongs_to :person
  has n, :people, :through => Resource

end

DataMapper.auto_migrate!

a = Person.new(:email => "[email protected]")
a.save
a = Person.new(:email => "[email protected]", :thing => 1)
a.save        
a = Person.new(:email => "[email protected]", :thing => 1)
a.save

m = Mailer.new()
m.subject = "Subject"
m.body = "Body"
m.person = Person.first() # Greg
m.people = Person.all(:thing => 1)
m.save()


__END__

 ~ (0.000043) SELECT sqlite_version(*)
 ~ (0.000062) DROP TABLE IF EXISTS "people"
 ~ (0.000044) DROP TABLE IF EXISTS "mailers"
 ~ (0.000013) DROP TABLE IF EXISTS "mailer_people"
 ~ (0.000012) PRAGMA table_info("people")
 ~ (0.000335) CREATE TABLE "people" ("id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "email" VARCHAR(50), "thing" INTEGER)
 ~ (0.000009) PRAGMA table_info("mailers")
 ~ (0.000174) CREATE TABLE "mailers" ("id" INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, "subject" VARCHAR(50), "body" TEXT, "sent_at" TIMESTAMP, "person_id" INTEGER NOT NULL)
 ~ (0.000098) CREATE INDEX "index_mailers_person" ON "mailers" ("person_id")
 ~ (0.000009) PRAGMA table_info("mailer_people")
 ~ (0.000157) CREATE TABLE "mailer_people" ("person_id" INTEGER NOT NULL, "conversation_id" INTEGER NOT NULL, "mailer_id" INTEGER NOT NULL, PRIMARY KEY("person_id", "conversation_id", "mailer_id"))
 ~ (0.000039) INSERT INTO "people" ("email") VALUES ('[email protected]')
 ~ (0.000069) INSERT INTO "people" ("email", "thing") VALUES ('[email protected]', 1)
 ~ (0.000041) INSERT INTO "people" ("email", "thing") VALUES ('[email protected]', 1)
 ~ (0.000046) SELECT "id", "email", "thing" FROM "people" ORDER BY "id" LIMIT 1
 ~ (0.000062) SELECT "id", "email", "thing" FROM "people" WHERE "thing" = 1 ORDER BY "id"
 ~ (0.000082) INSERT INTO "mailers" ("subject", "body", "person_id") VALUES ('Subject', 'Body', 1)
/Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/adapters/data_objects_adapter.rb:162:in `execute_non_query': mailer_people.conversation_id may not be NULL (DataObjects::IntegrityError)
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/adapters/data_objects_adapter.rb:162:in `execute'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/adapters/data_objects_adapter.rb:266:in `with_connection'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/adapters/data_objects_adapter.rb:160:in `execute'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/adapters/data_objects_adapter.rb:58:in `create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/adapters/data_objects_adapter.rb:31:in `each'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/adapters/data_objects_adapter.rb:31:in `create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/repository.rb:125:in `create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:808:in `_create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:621:in `hookable__create_hook_nan_before_advised'
	from /Library/Ruby/Gems/1.8/gems/extlib-0.9.13/lib/extlib/hook.rb:299:in `create_hook'
	from /Library/Ruby/Gems/1.8/gems/extlib-0.9.13/lib/extlib/hook.rb:297:in `catch'
	from /Library/Ruby/Gems/1.8/gems/extlib-0.9.13/lib/extlib/hook.rb:297:in `create_hook'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:554:in `save_self'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:343:in `save'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/model.rb:616:in `send'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/model.rb:616:in `_create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/model.rb:403:in `create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/collection.rb:1061:in `send'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/collection.rb:1061:in `_create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/repository.rb:107:in `scope'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/collection.rb:1061:in `_create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/associations/one_to_many.rb:272:in `_create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/collection.rb:721:in `create'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/associations/many_to_many.rb:416:in `send'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/associations/many_to_many.rb:416:in `create_intermediary'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/associations/many_to_many.rb:397:in `_save'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/associations/relationship.rb:524:in `all?'
	from /Library/Ruby/Gems/1.8/gems/extlib-0.9.13/lib/extlib/lazy_array.rb:452:in `each'
	from /Library/Ruby/Gems/1.8/gems/extlib-0.9.13/lib/extlib/lazy_array.rb:452:in `all?'
	from /Library/Ruby/Gems/1.8/gems/extlib-0.9.13/lib/extlib/lazy_array.rb:452:in `all?'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/associations/many_to_many.rb:397:in `_save'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/collection.rb:798:in `save'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:584:in `save_children'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/associations/relationship.rb:524:in `all?'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:582:in `each'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:582:in `all?'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:582:in `save_children'
	from /Library/Ruby/Gems/1.8/gems/dm-core-0.10.1/lib/dm-core/resource.rb:343:in `save'
	from /Users/example/Ruby Workspace/gist-229865/standalone_example.rb:53
 ~ (0.000193) SELECT "person_id", "conversation_id", "mailer_id" FROM "mailer_people" WHERE "mailer_id" = 1 AND "person_id" = 2 ORDER BY "person_id", "conversation_id", "mailer_id" LIMIT 1
 ~ mailer_people.conversation_id may not be NULL (code: 19, sql state: , query: INSERT INTO "mailer_people" ("person_id", "mailer_id") VALUES (2, 1), uri: sqlite3://:memory:)