PageRenderTime 53ms CodeModel.GetById 19ms RepoModel.GetById 0ms app.codeStats 0ms

/test/ext/test_declarative_inheritance.py

https://bitbucket.org/f0rk/sqlalchemy
Python | 1043 lines | 838 code | 185 blank | 20 comment | 2 complexity | d4a3cfcc92a92874f65b7aaad77f9fb5 MD5 | raw file
  1. from test.lib.testing import eq_, assert_raises, \
  2. assert_raises_message, is_
  3. from sqlalchemy.ext import declarative as decl
  4. from sqlalchemy import exc
  5. import sqlalchemy as sa
  6. from test.lib import testing
  7. from sqlalchemy import MetaData, Integer, String, ForeignKey, \
  8. ForeignKeyConstraint, Index
  9. from test.lib.schema import Table, Column
  10. from sqlalchemy.orm import relationship, create_session, class_mapper, \
  11. joinedload, configure_mappers, backref, clear_mappers, \
  12. polymorphic_union, deferred, column_property, composite,\
  13. Session
  14. from test.lib.testing import eq_
  15. from sqlalchemy.util import classproperty
  16. from sqlalchemy.ext.declarative import declared_attr, AbstractConcreteBase, ConcreteBase
  17. from test.lib import fixtures
  18. class DeclarativeTestBase(fixtures.TestBase, testing.AssertsExecutionResults):
  19. def setup(self):
  20. global Base
  21. Base = decl.declarative_base(testing.db)
  22. def teardown(self):
  23. Session.close_all()
  24. clear_mappers()
  25. Base.metadata.drop_all()
  26. class DeclarativeInheritanceTest(DeclarativeTestBase):
  27. def test_we_must_copy_mapper_args(self):
  28. class Person(Base):
  29. __tablename__ = 'people'
  30. id = Column(Integer, primary_key=True)
  31. discriminator = Column('type', String(50))
  32. __mapper_args__ = {'polymorphic_on': discriminator,
  33. 'polymorphic_identity': 'person'}
  34. class Engineer(Person):
  35. primary_language = Column(String(50))
  36. assert 'inherits' not in Person.__mapper_args__
  37. assert class_mapper(Engineer).polymorphic_identity is None
  38. assert class_mapper(Engineer).polymorphic_on is Person.__table__.c.type
  39. def test_we_must_only_copy_column_mapper_args(self):
  40. class Person(Base):
  41. __tablename__ = 'people'
  42. id = Column(Integer, primary_key=True)
  43. a=Column(Integer)
  44. b=Column(Integer)
  45. c=Column(Integer)
  46. d=Column(Integer)
  47. discriminator = Column('type', String(50))
  48. __mapper_args__ = {'polymorphic_on': discriminator,
  49. 'polymorphic_identity': 'person',
  50. 'version_id_col': 'a',
  51. 'column_prefix': 'bar',
  52. 'include_properties': ['id', 'a', 'b'],
  53. }
  54. assert class_mapper(Person).version_id_col == 'a'
  55. assert class_mapper(Person).include_properties == set(['id', 'a', 'b'])
  56. def test_custom_join_condition(self):
  57. class Foo(Base):
  58. __tablename__ = 'foo'
  59. id = Column('id', Integer, primary_key=True)
  60. class Bar(Foo):
  61. __tablename__ = 'bar'
  62. id = Column('id', Integer, primary_key=True)
  63. foo_id = Column('foo_id', Integer)
  64. __mapper_args__ = {'inherit_condition': foo_id == Foo.id}
  65. # compile succeeds because inherit_condition is honored
  66. configure_mappers()
  67. def test_joined(self):
  68. class Company(Base, fixtures.ComparableEntity):
  69. __tablename__ = 'companies'
  70. id = Column('id', Integer, primary_key=True,
  71. test_needs_autoincrement=True)
  72. name = Column('name', String(50))
  73. employees = relationship('Person')
  74. class Person(Base, fixtures.ComparableEntity):
  75. __tablename__ = 'people'
  76. id = Column('id', Integer, primary_key=True,
  77. test_needs_autoincrement=True)
  78. company_id = Column('company_id', Integer,
  79. ForeignKey('companies.id'))
  80. name = Column('name', String(50))
  81. discriminator = Column('type', String(50))
  82. __mapper_args__ = {'polymorphic_on': discriminator}
  83. class Engineer(Person):
  84. __tablename__ = 'engineers'
  85. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  86. id = Column('id', Integer, ForeignKey('people.id'),
  87. primary_key=True)
  88. primary_language = Column('primary_language', String(50))
  89. class Manager(Person):
  90. __tablename__ = 'managers'
  91. __mapper_args__ = {'polymorphic_identity': 'manager'}
  92. id = Column('id', Integer, ForeignKey('people.id'),
  93. primary_key=True)
  94. golf_swing = Column('golf_swing', String(50))
  95. Base.metadata.create_all()
  96. sess = create_session()
  97. c1 = Company(name='MegaCorp, Inc.',
  98. employees=[Engineer(name='dilbert',
  99. primary_language='java'), Engineer(name='wally',
  100. primary_language='c++'), Manager(name='dogbert',
  101. golf_swing='fore!')])
  102. c2 = Company(name='Elbonia, Inc.',
  103. employees=[Engineer(name='vlad',
  104. primary_language='cobol')])
  105. sess.add(c1)
  106. sess.add(c2)
  107. sess.flush()
  108. sess.expunge_all()
  109. eq_(sess.query(Company).filter(Company.employees.of_type(Engineer).
  110. any(Engineer.primary_language
  111. == 'cobol')).first(), c2)
  112. # ensure that the Manager mapper was compiled with the Manager id
  113. # column as higher priority. this ensures that "Manager.id"
  114. # is appropriately treated as the "id" column in the "manager"
  115. # table (reversed from 0.6's behavior.)
  116. assert Manager.id.property.columns == [Manager.__table__.c.id, Person.__table__.c.id]
  117. # assert that the "id" column is available without a second
  118. # load. as of 0.7, the ColumnProperty tests all columns
  119. # in it's list to see which is present in the row.
  120. sess.expunge_all()
  121. def go():
  122. assert sess.query(Manager).filter(Manager.name == 'dogbert'
  123. ).one().id
  124. self.assert_sql_count(testing.db, go, 1)
  125. sess.expunge_all()
  126. def go():
  127. assert sess.query(Person).filter(Manager.name == 'dogbert'
  128. ).one().id
  129. self.assert_sql_count(testing.db, go, 1)
  130. def test_add_subcol_after_the_fact(self):
  131. class Person(Base, fixtures.ComparableEntity):
  132. __tablename__ = 'people'
  133. id = Column('id', Integer, primary_key=True,
  134. test_needs_autoincrement=True)
  135. name = Column('name', String(50))
  136. discriminator = Column('type', String(50))
  137. __mapper_args__ = {'polymorphic_on': discriminator}
  138. class Engineer(Person):
  139. __tablename__ = 'engineers'
  140. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  141. id = Column('id', Integer, ForeignKey('people.id'),
  142. primary_key=True)
  143. Engineer.primary_language = Column('primary_language',
  144. String(50))
  145. Base.metadata.create_all()
  146. sess = create_session()
  147. e1 = Engineer(primary_language='java', name='dilbert')
  148. sess.add(e1)
  149. sess.flush()
  150. sess.expunge_all()
  151. eq_(sess.query(Person).first(), Engineer(primary_language='java'
  152. , name='dilbert'))
  153. def test_add_parentcol_after_the_fact(self):
  154. class Person(Base, fixtures.ComparableEntity):
  155. __tablename__ = 'people'
  156. id = Column('id', Integer, primary_key=True,
  157. test_needs_autoincrement=True)
  158. discriminator = Column('type', String(50))
  159. __mapper_args__ = {'polymorphic_on': discriminator}
  160. class Engineer(Person):
  161. __tablename__ = 'engineers'
  162. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  163. primary_language = Column(String(50))
  164. id = Column('id', Integer, ForeignKey('people.id'),
  165. primary_key=True)
  166. Person.name = Column('name', String(50))
  167. Base.metadata.create_all()
  168. sess = create_session()
  169. e1 = Engineer(primary_language='java', name='dilbert')
  170. sess.add(e1)
  171. sess.flush()
  172. sess.expunge_all()
  173. eq_(sess.query(Person).first(),
  174. Engineer(primary_language='java', name='dilbert'))
  175. def test_add_sub_parentcol_after_the_fact(self):
  176. class Person(Base, fixtures.ComparableEntity):
  177. __tablename__ = 'people'
  178. id = Column('id', Integer, primary_key=True,
  179. test_needs_autoincrement=True)
  180. discriminator = Column('type', String(50))
  181. __mapper_args__ = {'polymorphic_on': discriminator}
  182. class Engineer(Person):
  183. __tablename__ = 'engineers'
  184. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  185. primary_language = Column(String(50))
  186. id = Column('id', Integer, ForeignKey('people.id'),
  187. primary_key=True)
  188. class Admin(Engineer):
  189. __tablename__ = 'admins'
  190. __mapper_args__ = {'polymorphic_identity': 'admin'}
  191. workstation = Column(String(50))
  192. id = Column('id', Integer, ForeignKey('engineers.id'),
  193. primary_key=True)
  194. Person.name = Column('name', String(50))
  195. Base.metadata.create_all()
  196. sess = create_session()
  197. e1 = Admin(primary_language='java', name='dilbert',
  198. workstation='foo')
  199. sess.add(e1)
  200. sess.flush()
  201. sess.expunge_all()
  202. eq_(sess.query(Person).first(), Admin(primary_language='java',
  203. name='dilbert', workstation='foo'))
  204. def test_subclass_mixin(self):
  205. class Person(Base, fixtures.ComparableEntity):
  206. __tablename__ = 'people'
  207. id = Column('id', Integer, primary_key=True)
  208. name = Column('name', String(50))
  209. discriminator = Column('type', String(50))
  210. __mapper_args__ = {'polymorphic_on': discriminator}
  211. class MyMixin(object):
  212. pass
  213. class Engineer(MyMixin, Person):
  214. __tablename__ = 'engineers'
  215. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  216. id = Column('id', Integer, ForeignKey('people.id'),
  217. primary_key=True)
  218. primary_language = Column('primary_language', String(50))
  219. assert class_mapper(Engineer).inherits is class_mapper(Person)
  220. @testing.fails_if(lambda: True, "Not implemented until 0.7")
  221. def test_foreign_keys_with_col(self):
  222. """Test that foreign keys that reference a literal 'id' subclass
  223. 'id' attribute behave intuitively.
  224. See [ticket:1892].
  225. """
  226. class Booking(Base):
  227. __tablename__ = 'booking'
  228. id = Column(Integer, primary_key=True)
  229. class PlanBooking(Booking):
  230. __tablename__ = 'plan_booking'
  231. id = Column(Integer, ForeignKey(Booking.id),
  232. primary_key=True)
  233. # referencing PlanBooking.id gives us the column
  234. # on plan_booking, not booking
  235. class FeatureBooking(Booking):
  236. __tablename__ = 'feature_booking'
  237. id = Column(Integer, ForeignKey(Booking.id),
  238. primary_key=True)
  239. plan_booking_id = Column(Integer,
  240. ForeignKey(PlanBooking.id))
  241. plan_booking = relationship(PlanBooking,
  242. backref='feature_bookings')
  243. assert FeatureBooking.__table__.c.plan_booking_id.\
  244. references(PlanBooking.__table__.c.id)
  245. assert FeatureBooking.__table__.c.id.\
  246. references(Booking.__table__.c.id)
  247. def test_with_undefined_foreignkey(self):
  248. class Parent(Base):
  249. __tablename__ = 'parent'
  250. id = Column('id', Integer, primary_key=True)
  251. tp = Column('type', String(50))
  252. __mapper_args__ = dict(polymorphic_on=tp)
  253. class Child1(Parent):
  254. __tablename__ = 'child1'
  255. id = Column('id', Integer, ForeignKey('parent.id'),
  256. primary_key=True)
  257. related_child2 = Column('c2', Integer,
  258. ForeignKey('child2.id'))
  259. __mapper_args__ = dict(polymorphic_identity='child1')
  260. # no exception is raised by the ForeignKey to "child2" even
  261. # though child2 doesn't exist yet
  262. class Child2(Parent):
  263. __tablename__ = 'child2'
  264. id = Column('id', Integer, ForeignKey('parent.id'),
  265. primary_key=True)
  266. related_child1 = Column('c1', Integer)
  267. __mapper_args__ = dict(polymorphic_identity='child2')
  268. sa.orm.configure_mappers() # no exceptions here
  269. def test_foreign_keys_with_col(self):
  270. """Test that foreign keys that reference a literal 'id' subclass
  271. 'id' attribute behave intuitively.
  272. See [ticket:1892].
  273. """
  274. class Booking(Base):
  275. __tablename__ = 'booking'
  276. id = Column(Integer, primary_key=True)
  277. class PlanBooking(Booking):
  278. __tablename__ = 'plan_booking'
  279. id = Column(Integer, ForeignKey(Booking.id),
  280. primary_key=True)
  281. # referencing PlanBooking.id gives us the column
  282. # on plan_booking, not booking
  283. class FeatureBooking(Booking):
  284. __tablename__ = 'feature_booking'
  285. id = Column(Integer, ForeignKey(Booking.id),
  286. primary_key=True)
  287. plan_booking_id = Column(Integer,
  288. ForeignKey(PlanBooking.id))
  289. plan_booking = relationship(PlanBooking,
  290. backref='feature_bookings')
  291. assert FeatureBooking.__table__.c.plan_booking_id.\
  292. references(PlanBooking.__table__.c.id)
  293. assert FeatureBooking.__table__.c.id.\
  294. references(Booking.__table__.c.id)
  295. def test_single_colsonbase(self):
  296. """test single inheritance where all the columns are on the base
  297. class."""
  298. class Company(Base, fixtures.ComparableEntity):
  299. __tablename__ = 'companies'
  300. id = Column('id', Integer, primary_key=True,
  301. test_needs_autoincrement=True)
  302. name = Column('name', String(50))
  303. employees = relationship('Person')
  304. class Person(Base, fixtures.ComparableEntity):
  305. __tablename__ = 'people'
  306. id = Column('id', Integer, primary_key=True,
  307. test_needs_autoincrement=True)
  308. company_id = Column('company_id', Integer,
  309. ForeignKey('companies.id'))
  310. name = Column('name', String(50))
  311. discriminator = Column('type', String(50))
  312. primary_language = Column('primary_language', String(50))
  313. golf_swing = Column('golf_swing', String(50))
  314. __mapper_args__ = {'polymorphic_on': discriminator}
  315. class Engineer(Person):
  316. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  317. class Manager(Person):
  318. __mapper_args__ = {'polymorphic_identity': 'manager'}
  319. Base.metadata.create_all()
  320. sess = create_session()
  321. c1 = Company(name='MegaCorp, Inc.',
  322. employees=[Engineer(name='dilbert',
  323. primary_language='java'), Engineer(name='wally',
  324. primary_language='c++'), Manager(name='dogbert',
  325. golf_swing='fore!')])
  326. c2 = Company(name='Elbonia, Inc.',
  327. employees=[Engineer(name='vlad',
  328. primary_language='cobol')])
  329. sess.add(c1)
  330. sess.add(c2)
  331. sess.flush()
  332. sess.expunge_all()
  333. eq_(sess.query(Person).filter(Engineer.primary_language
  334. == 'cobol').first(), Engineer(name='vlad'))
  335. eq_(sess.query(Company).filter(Company.employees.of_type(Engineer).
  336. any(Engineer.primary_language
  337. == 'cobol')).first(), c2)
  338. def test_single_colsonsub(self):
  339. """test single inheritance where the columns are local to their
  340. class.
  341. this is a newer usage.
  342. """
  343. class Company(Base, fixtures.ComparableEntity):
  344. __tablename__ = 'companies'
  345. id = Column('id', Integer, primary_key=True,
  346. test_needs_autoincrement=True)
  347. name = Column('name', String(50))
  348. employees = relationship('Person')
  349. class Person(Base, fixtures.ComparableEntity):
  350. __tablename__ = 'people'
  351. id = Column(Integer, primary_key=True,
  352. test_needs_autoincrement=True)
  353. company_id = Column(Integer, ForeignKey('companies.id'))
  354. name = Column(String(50))
  355. discriminator = Column('type', String(50))
  356. __mapper_args__ = {'polymorphic_on': discriminator}
  357. class Engineer(Person):
  358. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  359. primary_language = Column(String(50))
  360. class Manager(Person):
  361. __mapper_args__ = {'polymorphic_identity': 'manager'}
  362. golf_swing = Column(String(50))
  363. # we have here a situation that is somewhat unique. the Person
  364. # class is mapped to the "people" table, but it was mapped when
  365. # the table did not include the "primary_language" or
  366. # "golf_swing" columns. declarative will also manipulate the
  367. # exclude_properties collection so that sibling classes don't
  368. # cross-pollinate.
  369. assert Person.__table__.c.company_id is not None
  370. assert Person.__table__.c.golf_swing is not None
  371. assert Person.__table__.c.primary_language is not None
  372. assert Engineer.primary_language is not None
  373. assert Manager.golf_swing is not None
  374. assert not hasattr(Person, 'primary_language')
  375. assert not hasattr(Person, 'golf_swing')
  376. assert not hasattr(Engineer, 'golf_swing')
  377. assert not hasattr(Manager, 'primary_language')
  378. Base.metadata.create_all()
  379. sess = create_session()
  380. e1 = Engineer(name='dilbert', primary_language='java')
  381. e2 = Engineer(name='wally', primary_language='c++')
  382. m1 = Manager(name='dogbert', golf_swing='fore!')
  383. c1 = Company(name='MegaCorp, Inc.', employees=[e1, e2, m1])
  384. e3 = Engineer(name='vlad', primary_language='cobol')
  385. c2 = Company(name='Elbonia, Inc.', employees=[e3])
  386. sess.add(c1)
  387. sess.add(c2)
  388. sess.flush()
  389. sess.expunge_all()
  390. eq_(sess.query(Person).filter(Engineer.primary_language
  391. == 'cobol').first(), Engineer(name='vlad'))
  392. eq_(sess.query(Company).filter(Company.employees.of_type(Engineer).
  393. any(Engineer.primary_language
  394. == 'cobol')).first(), c2)
  395. eq_(sess.query(Engineer).filter_by(primary_language='cobol'
  396. ).one(), Engineer(name='vlad', primary_language='cobol'))
  397. def test_joined_from_single(self):
  398. class Company(Base, fixtures.ComparableEntity):
  399. __tablename__ = 'companies'
  400. id = Column('id', Integer, primary_key=True,
  401. test_needs_autoincrement=True)
  402. name = Column('name', String(50))
  403. employees = relationship('Person')
  404. class Person(Base, fixtures.ComparableEntity):
  405. __tablename__ = 'people'
  406. id = Column(Integer, primary_key=True,
  407. test_needs_autoincrement=True)
  408. company_id = Column(Integer, ForeignKey('companies.id'))
  409. name = Column(String(50))
  410. discriminator = Column('type', String(50))
  411. __mapper_args__ = {'polymorphic_on': discriminator}
  412. class Manager(Person):
  413. __mapper_args__ = {'polymorphic_identity': 'manager'}
  414. golf_swing = Column(String(50))
  415. class Engineer(Person):
  416. __tablename__ = 'engineers'
  417. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  418. id = Column(Integer, ForeignKey('people.id'),
  419. primary_key=True)
  420. primary_language = Column(String(50))
  421. assert Person.__table__.c.golf_swing is not None
  422. assert not Person.__table__.c.has_key('primary_language')
  423. assert Engineer.__table__.c.primary_language is not None
  424. assert Engineer.primary_language is not None
  425. assert Manager.golf_swing is not None
  426. assert not hasattr(Person, 'primary_language')
  427. assert not hasattr(Person, 'golf_swing')
  428. assert not hasattr(Engineer, 'golf_swing')
  429. assert not hasattr(Manager, 'primary_language')
  430. Base.metadata.create_all()
  431. sess = create_session()
  432. e1 = Engineer(name='dilbert', primary_language='java')
  433. e2 = Engineer(name='wally', primary_language='c++')
  434. m1 = Manager(name='dogbert', golf_swing='fore!')
  435. c1 = Company(name='MegaCorp, Inc.', employees=[e1, e2, m1])
  436. e3 = Engineer(name='vlad', primary_language='cobol')
  437. c2 = Company(name='Elbonia, Inc.', employees=[e3])
  438. sess.add(c1)
  439. sess.add(c2)
  440. sess.flush()
  441. sess.expunge_all()
  442. eq_(sess.query(Person).with_polymorphic(Engineer).
  443. filter(Engineer.primary_language
  444. == 'cobol').first(), Engineer(name='vlad'))
  445. eq_(sess.query(Company).filter(Company.employees.of_type(Engineer).
  446. any(Engineer.primary_language
  447. == 'cobol')).first(), c2)
  448. eq_(sess.query(Engineer).filter_by(primary_language='cobol'
  449. ).one(), Engineer(name='vlad', primary_language='cobol'))
  450. def test_polymorphic_on_converted_from_inst(self):
  451. class A(Base):
  452. __tablename__ = 'A'
  453. id = Column(Integer, primary_key=True)
  454. discriminator = Column(String)
  455. @declared_attr
  456. def __mapper_args__(cls):
  457. return {
  458. 'polymorphic_identity': cls.__name__,
  459. 'polymorphic_on': cls.discriminator
  460. }
  461. class B(A):
  462. pass
  463. is_(B.__mapper__.polymorphic_on, A.__table__.c.discriminator)
  464. def test_add_deferred(self):
  465. class Person(Base, fixtures.ComparableEntity):
  466. __tablename__ = 'people'
  467. id = Column('id', Integer, primary_key=True,
  468. test_needs_autoincrement=True)
  469. Person.name = deferred(Column(String(10)))
  470. Base.metadata.create_all()
  471. sess = create_session()
  472. p = Person(name='ratbert')
  473. sess.add(p)
  474. sess.flush()
  475. sess.expunge_all()
  476. eq_(sess.query(Person).all(), [Person(name='ratbert')])
  477. sess.expunge_all()
  478. person = sess.query(Person).filter(Person.name == 'ratbert'
  479. ).one()
  480. assert 'name' not in person.__dict__
  481. def test_single_fksonsub(self):
  482. """test single inheritance with a foreign key-holding column on
  483. a subclass.
  484. """
  485. class Person(Base, fixtures.ComparableEntity):
  486. __tablename__ = 'people'
  487. id = Column(Integer, primary_key=True,
  488. test_needs_autoincrement=True)
  489. name = Column(String(50))
  490. discriminator = Column('type', String(50))
  491. __mapper_args__ = {'polymorphic_on': discriminator}
  492. class Engineer(Person):
  493. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  494. primary_language_id = Column(Integer,
  495. ForeignKey('languages.id'))
  496. primary_language = relationship('Language')
  497. class Language(Base, fixtures.ComparableEntity):
  498. __tablename__ = 'languages'
  499. id = Column(Integer, primary_key=True,
  500. test_needs_autoincrement=True)
  501. name = Column(String(50))
  502. assert not hasattr(Person, 'primary_language_id')
  503. Base.metadata.create_all()
  504. sess = create_session()
  505. java, cpp, cobol = Language(name='java'), Language(name='cpp'), \
  506. Language(name='cobol')
  507. e1 = Engineer(name='dilbert', primary_language=java)
  508. e2 = Engineer(name='wally', primary_language=cpp)
  509. e3 = Engineer(name='vlad', primary_language=cobol)
  510. sess.add_all([e1, e2, e3])
  511. sess.flush()
  512. sess.expunge_all()
  513. eq_(sess.query(Person).filter(Engineer.primary_language.has(
  514. Language.name
  515. == 'cobol')).first(), Engineer(name='vlad',
  516. primary_language=Language(name='cobol')))
  517. eq_(sess.query(Engineer).filter(Engineer.primary_language.has(
  518. Language.name
  519. == 'cobol')).one(), Engineer(name='vlad',
  520. primary_language=Language(name='cobol')))
  521. eq_(sess.query(Person).join(Engineer.primary_language).order_by(
  522. Language.name).all(),
  523. [Engineer(name='vlad',
  524. primary_language=Language(name='cobol')),
  525. Engineer(name='wally', primary_language=Language(name='cpp'
  526. )), Engineer(name='dilbert',
  527. primary_language=Language(name='java'))])
  528. def test_single_three_levels(self):
  529. class Person(Base, fixtures.ComparableEntity):
  530. __tablename__ = 'people'
  531. id = Column(Integer, primary_key=True)
  532. name = Column(String(50))
  533. discriminator = Column('type', String(50))
  534. __mapper_args__ = {'polymorphic_on': discriminator}
  535. class Engineer(Person):
  536. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  537. primary_language = Column(String(50))
  538. class JuniorEngineer(Engineer):
  539. __mapper_args__ = \
  540. {'polymorphic_identity': 'junior_engineer'}
  541. nerf_gun = Column(String(50))
  542. class Manager(Person):
  543. __mapper_args__ = {'polymorphic_identity': 'manager'}
  544. golf_swing = Column(String(50))
  545. assert JuniorEngineer.nerf_gun
  546. assert JuniorEngineer.primary_language
  547. assert JuniorEngineer.name
  548. assert Manager.golf_swing
  549. assert Engineer.primary_language
  550. assert not hasattr(Engineer, 'golf_swing')
  551. assert not hasattr(Engineer, 'nerf_gun')
  552. assert not hasattr(Manager, 'nerf_gun')
  553. assert not hasattr(Manager, 'primary_language')
  554. def test_single_detects_conflict(self):
  555. class Person(Base):
  556. __tablename__ = 'people'
  557. id = Column(Integer, primary_key=True)
  558. name = Column(String(50))
  559. discriminator = Column('type', String(50))
  560. __mapper_args__ = {'polymorphic_on': discriminator}
  561. class Engineer(Person):
  562. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  563. primary_language = Column(String(50))
  564. # test sibling col conflict
  565. def go():
  566. class Manager(Person):
  567. __mapper_args__ = {'polymorphic_identity': 'manager'}
  568. golf_swing = Column(String(50))
  569. primary_language = Column(String(50))
  570. assert_raises(sa.exc.ArgumentError, go)
  571. # test parent col conflict
  572. def go():
  573. class Salesman(Person):
  574. __mapper_args__ = {'polymorphic_identity': 'manager'}
  575. name = Column(String(50))
  576. assert_raises(sa.exc.ArgumentError, go)
  577. def test_single_no_special_cols(self):
  578. class Person(Base, fixtures.ComparableEntity):
  579. __tablename__ = 'people'
  580. id = Column('id', Integer, primary_key=True)
  581. name = Column('name', String(50))
  582. discriminator = Column('type', String(50))
  583. __mapper_args__ = {'polymorphic_on': discriminator}
  584. def go():
  585. class Engineer(Person):
  586. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  587. primary_language = Column('primary_language',
  588. String(50))
  589. foo_bar = Column(Integer, primary_key=True)
  590. assert_raises_message(sa.exc.ArgumentError, 'place primary key'
  591. , go)
  592. def test_single_no_table_args(self):
  593. class Person(Base, fixtures.ComparableEntity):
  594. __tablename__ = 'people'
  595. id = Column('id', Integer, primary_key=True)
  596. name = Column('name', String(50))
  597. discriminator = Column('type', String(50))
  598. __mapper_args__ = {'polymorphic_on': discriminator}
  599. def go():
  600. class Engineer(Person):
  601. __mapper_args__ = {'polymorphic_identity': 'engineer'}
  602. primary_language = Column('primary_language',
  603. String(50))
  604. # this should be on the Person class, as this is single
  605. # table inheritance, which is why we test that this
  606. # throws an exception!
  607. __table_args__ = {'mysql_engine': 'InnoDB'}
  608. assert_raises_message(sa.exc.ArgumentError,
  609. 'place __table_args__', go)
  610. @testing.emits_warning("The classname")
  611. def test_dupe_name_in_hierarchy(self):
  612. class A(Base):
  613. __tablename__ = "a"
  614. id = Column( Integer, primary_key=True)
  615. a_1 = A
  616. class A(a_1):
  617. __tablename__ = 'b'
  618. id = Column(Integer(),ForeignKey(a_1.id), primary_key = True)
  619. assert A.__mapper__.inherits is a_1.__mapper__
  620. class OverlapColPrecedenceTest(DeclarativeTestBase):
  621. """test #1892 cases when declarative does column precedence."""
  622. def _run_test(self, Engineer, e_id, p_id):
  623. p_table = Base.metadata.tables['person']
  624. e_table = Base.metadata.tables['engineer']
  625. assert Engineer.id.property.columns[0] is e_table.c[e_id]
  626. assert Engineer.id.property.columns[1] is p_table.c[p_id]
  627. def test_basic(self):
  628. class Person(Base):
  629. __tablename__ = 'person'
  630. id = Column(Integer, primary_key=True)
  631. class Engineer(Person):
  632. __tablename__ = 'engineer'
  633. id = Column(Integer, ForeignKey('person.id'), primary_key=True)
  634. self._run_test(Engineer, "id", "id")
  635. def test_alt_name_base(self):
  636. class Person(Base):
  637. __tablename__ = 'person'
  638. id = Column("pid", Integer, primary_key=True)
  639. class Engineer(Person):
  640. __tablename__ = 'engineer'
  641. id = Column(Integer, ForeignKey('person.pid'), primary_key=True)
  642. self._run_test(Engineer, "id", "pid")
  643. def test_alt_name_sub(self):
  644. class Person(Base):
  645. __tablename__ = 'person'
  646. id = Column(Integer, primary_key=True)
  647. class Engineer(Person):
  648. __tablename__ = 'engineer'
  649. id = Column("eid", Integer, ForeignKey('person.id'), primary_key=True)
  650. self._run_test(Engineer, "eid", "id")
  651. def test_alt_name_both(self):
  652. class Person(Base):
  653. __tablename__ = 'person'
  654. id = Column("pid", Integer, primary_key=True)
  655. class Engineer(Person):
  656. __tablename__ = 'engineer'
  657. id = Column("eid", Integer, ForeignKey('person.pid'), primary_key=True)
  658. self._run_test(Engineer, "eid", "pid")
  659. from test.orm.test_events import _RemoveListeners
  660. class ConcreteInhTest(_RemoveListeners, DeclarativeTestBase):
  661. def _roundtrip(self, Employee, Manager, Engineer, Boss, polymorphic=True):
  662. Base.metadata.create_all()
  663. sess = create_session()
  664. e1 = Engineer(name='dilbert', primary_language='java')
  665. e2 = Engineer(name='wally', primary_language='c++')
  666. m1 = Manager(name='dogbert', golf_swing='fore!')
  667. e3 = Engineer(name='vlad', primary_language='cobol')
  668. b1 = Boss(name="pointy haired")
  669. sess.add_all([e1, e2, m1, e3, b1])
  670. sess.flush()
  671. sess.expunge_all()
  672. if polymorphic:
  673. eq_(sess.query(Employee).order_by(Employee.name).all(),
  674. [Engineer(name='dilbert'), Manager(name='dogbert'),
  675. Boss(name='pointy haired'), Engineer(name='vlad'), Engineer(name='wally')])
  676. else:
  677. eq_(sess.query(Engineer).order_by(Engineer.name).all(),
  678. [Engineer(name='dilbert'), Engineer(name='vlad'),
  679. Engineer(name='wally')])
  680. eq_(sess.query(Manager).all(), [Manager(name='dogbert')])
  681. eq_(sess.query(Boss).all(), [Boss(name='pointy haired')])
  682. def test_explicit(self):
  683. engineers = Table('engineers', Base.metadata, Column('id',
  684. Integer, primary_key=True,
  685. test_needs_autoincrement=True), Column('name'
  686. , String(50)), Column('primary_language',
  687. String(50)))
  688. managers = Table('managers', Base.metadata,
  689. Column('id',Integer, primary_key=True, test_needs_autoincrement=True),
  690. Column('name', String(50)),
  691. Column('golf_swing', String(50))
  692. )
  693. boss = Table('boss', Base.metadata,
  694. Column('id',Integer, primary_key=True, test_needs_autoincrement=True),
  695. Column('name', String(50)),
  696. Column('golf_swing', String(50))
  697. )
  698. punion = polymorphic_union({
  699. 'engineer': engineers,
  700. 'manager' : managers,
  701. 'boss': boss}, 'type', 'punion')
  702. class Employee(Base, fixtures.ComparableEntity):
  703. __table__ = punion
  704. __mapper_args__ = {'polymorphic_on': punion.c.type}
  705. class Engineer(Employee):
  706. __table__ = engineers
  707. __mapper_args__ = {'polymorphic_identity': 'engineer',
  708. 'concrete': True}
  709. class Manager(Employee):
  710. __table__ = managers
  711. __mapper_args__ = {'polymorphic_identity': 'manager',
  712. 'concrete': True}
  713. class Boss(Manager):
  714. __table__ = boss
  715. __mapper_args__ = {'polymorphic_identity': 'boss',
  716. 'concrete': True}
  717. self._roundtrip(Employee, Manager, Engineer, Boss)
  718. def test_concrete_inline_non_polymorphic(self):
  719. """test the example from the declarative docs."""
  720. class Employee(Base, fixtures.ComparableEntity):
  721. __tablename__ = 'people'
  722. id = Column(Integer, primary_key=True,
  723. test_needs_autoincrement=True)
  724. name = Column(String(50))
  725. class Engineer(Employee):
  726. __tablename__ = 'engineers'
  727. __mapper_args__ = {'concrete': True}
  728. id = Column(Integer, primary_key=True,
  729. test_needs_autoincrement=True)
  730. primary_language = Column(String(50))
  731. name = Column(String(50))
  732. class Manager(Employee):
  733. __tablename__ = 'manager'
  734. __mapper_args__ = {'concrete': True}
  735. id = Column(Integer, primary_key=True,
  736. test_needs_autoincrement=True)
  737. golf_swing = Column(String(50))
  738. name = Column(String(50))
  739. class Boss(Manager):
  740. __tablename__ = 'boss'
  741. __mapper_args__ = {'concrete': True}
  742. id = Column(Integer, primary_key=True,
  743. test_needs_autoincrement=True)
  744. golf_swing = Column(String(50))
  745. name = Column(String(50))
  746. self._roundtrip(Employee, Manager, Engineer, Boss, polymorphic=False)
  747. def test_abstract_concrete_extension(self):
  748. class Employee(AbstractConcreteBase, Base, fixtures.ComparableEntity):
  749. pass
  750. class Manager(Employee):
  751. __tablename__ = 'manager'
  752. employee_id = Column(Integer, primary_key=True,
  753. test_needs_autoincrement=True)
  754. name = Column(String(50))
  755. golf_swing = Column(String(40))
  756. __mapper_args__ = {
  757. 'polymorphic_identity':'manager',
  758. 'concrete':True}
  759. class Boss(Manager):
  760. __tablename__ = 'boss'
  761. employee_id = Column(Integer, primary_key=True,
  762. test_needs_autoincrement=True)
  763. name = Column(String(50))
  764. golf_swing = Column(String(40))
  765. __mapper_args__ = {
  766. 'polymorphic_identity':'boss',
  767. 'concrete':True}
  768. class Engineer(Employee):
  769. __tablename__ = 'engineer'
  770. employee_id = Column(Integer, primary_key=True,
  771. test_needs_autoincrement=True)
  772. name = Column(String(50))
  773. primary_language = Column(String(40))
  774. __mapper_args__ = {'polymorphic_identity':'engineer',
  775. 'concrete':True}
  776. self._roundtrip(Employee, Manager, Engineer, Boss)
  777. def test_concrete_extension(self):
  778. class Employee(ConcreteBase, Base, fixtures.ComparableEntity):
  779. __tablename__ = 'employee'
  780. employee_id = Column(Integer, primary_key=True,
  781. test_needs_autoincrement=True)
  782. name = Column(String(50))
  783. __mapper_args__ = {
  784. 'polymorphic_identity':'employee',
  785. 'concrete':True}
  786. class Manager(Employee):
  787. __tablename__ = 'manager'
  788. employee_id = Column(Integer, primary_key=True,
  789. test_needs_autoincrement=True)
  790. name = Column(String(50))
  791. golf_swing = Column(String(40))
  792. __mapper_args__ = {
  793. 'polymorphic_identity':'manager',
  794. 'concrete':True}
  795. class Boss(Manager):
  796. __tablename__ = 'boss'
  797. employee_id = Column(Integer, primary_key=True,
  798. test_needs_autoincrement=True)
  799. name = Column(String(50))
  800. golf_swing = Column(String(40))
  801. __mapper_args__ = {
  802. 'polymorphic_identity':'boss',
  803. 'concrete':True}
  804. class Engineer(Employee):
  805. __tablename__ = 'engineer'
  806. employee_id = Column(Integer, primary_key=True,
  807. test_needs_autoincrement=True)
  808. name = Column(String(50))
  809. primary_language = Column(String(40))
  810. __mapper_args__ = {'polymorphic_identity':'engineer',
  811. 'concrete':True}
  812. self._roundtrip(Employee, Manager, Engineer, Boss)