Source code for sqlobject.inheritance.tests.test_deep_inheritance

from pytest import raises, skip
from sqlobject import ForeignKey, MultipleJoin, StringCol
from sqlobject.inheritance import InheritableSQLObject
from sqlobject.tests.dbtest import getConnection, setupClass, supports

########################################
# Deep Inheritance
########################################


[docs]class DIPerson(InheritableSQLObject): firstName = StringCol(length=100) lastName = StringCol(alternateID=True, length=255) manager = ForeignKey("DIManager", default=None)
[docs]class DIEmployee(DIPerson): so_position = StringCol(unique=True, length=100)
[docs]class DIManager(DIEmployee): subdudes = MultipleJoin("DIPerson", joinColumn="manager_id")
[docs]def test_creation_fail(): """ Try to create a Manager without specifying a position. This should fail without leaving any partial records in the database. """ setupClass([DIManager, DIEmployee, DIPerson]) kwargs = {'firstName': 'John', 'lastname': 'Doe'} raises(TypeError, DIManager, **kwargs) persons = DIEmployee.select(DIPerson.q.firstName == 'John') assert persons.count() == 0
[docs]def test_creation_fail2(): """ Try to create two Managers with the same position. This should fail without leaving any partial records in the database. """ setupClass([DIManager, DIEmployee, DIPerson]) kwargs = {'firstName': 'John', 'lastName': 'Doe', 'so_position': 'Project Manager'} DIManager(**kwargs) persons = DIEmployee.select(DIPerson.q.firstName == 'John') assert persons.count() == 1 kwargs = {'firstName': 'John', 'lastName': 'Doe II', 'so_position': 'Project Manager'} raises(Exception, DIManager, **kwargs) persons = DIPerson.select(DIPerson.q.firstName == 'John') assert persons.count() == 1 if not supports('transactions'): skip("Transactions aren't supported") transaction = DIPerson._connection.transaction() kwargs = {'firstName': 'John', 'lastName': 'Doe III', 'so_position': 'Project Manager'} raises(Exception, DIManager, connection=transaction, **kwargs) transaction.rollback() transaction.begin() persons = DIPerson.select(DIPerson.q.firstName == 'John', connection=transaction) assert persons.count() == 1
[docs]def test_deep_inheritance(): setupClass([DIManager, DIEmployee, DIPerson]) manager = DIManager(firstName='Project', lastName='Manager', so_position='Project Manager') manager_id = manager.id employee_id = DIEmployee(firstName='Project', lastName='Leader', so_position='Project leader', manager=manager).id DIPerson(firstName='Oneof', lastName='Authors', manager=manager) conn = getConnection() cache = conn.cache cache.clear() managers = list(DIManager.select()) assert len(managers) == 1 cache.clear() employees = list(DIEmployee.select()) assert len(employees) == 2 cache.clear() persons = list(DIPerson.select()) assert len(persons) == 3 cache.clear() person = DIPerson.get(employee_id) assert isinstance(person, DIEmployee) person = DIPerson.get(manager_id) assert isinstance(person, DIEmployee) assert isinstance(person, DIManager) cache.clear() person = DIEmployee.get(manager_id) assert isinstance(person, DIManager) conn.close()