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"""
test options
"""
from sqlalchemy import UniqueConstraint, create_engine, Column
from sqlalchemy.orm import scoped_session, sessionmaker
from sqlalchemy.exceptions import SQLError, ConcurrentModificationError
from elixir import *
class TestOptions(object):
def setup(self):
metadata.bind = 'sqlite:///'
def teardown(self):
cleanup_all()
# this test is a rip-off SQLAlchemy's activemapper's update test
def test_version_id_col(self):
class Person(Entity):
name = Field(String(30))
using_options(version_id_col=True)
setup_all()
Person.table.create()
p1 = Person(name='Daniel')
session.commit()
session.clear()
person = Person.query.first()
person.name = 'Gaetan'
session.commit()
assert person.row_version == 2
session.clear()
person = Person.query.first()
person.name = 'Jonathan'
session.commit()
assert person.row_version == 3
session.clear()
# check that a concurrent modification raises exception
p1 = Person.query.first()
s2 = sessionmaker()()
p2 = s2.query(Person).first()
p1.name = "Daniel"
p2.name = "Gaetan"
s2.commit()
try:
session.commit()
assert False
except ConcurrentModificationError:
pass
s2.close()
def test_allowcoloverride_false(self):
class MyEntity(Entity):
name = Field(String(30))
setup_all(True)
raised = False
try:
MyEntity._descriptor.add_column(Column('name', String(30)))
except Exception:
raised = True
assert raised
def test_allowcoloverride_true(self):
class MyEntity(Entity):
name = Field(String(30))
using_options(allowcoloverride=True)
setup_all()
# Note that this test is bogus as you cannot just change a column this
# way since the mapper is already constructed at this point and will
# use the old column!!! This test is only meant as a way to check no
# exception is raised.
#TODO: provide a proper test (using autoloaded tables)
MyEntity._descriptor.add_column(Column('name', String(30),
default='test'))
def test_tablename_func(self):
import re
def camel_to_underscore(entity):
return re.sub(r'(.+?)([A-Z])+?', r'\1_\2', entity.__name__).lower()
options_defaults['tablename'] = camel_to_underscore
class MyEntity(Entity):
name = Field(String(30))
class MySuperTestEntity(Entity):
name = Field(String(30))
setup_all(True)
assert MyEntity.table.name == 'my_entity'
assert MySuperTestEntity.table.name == 'my_super_test_entity'
options_defaults['tablename'] = None
class TestSessionOptions(object):
def setup(self):
metadata.bind = None
def teardown(self):
cleanup_all()
def test_manual_session(self):
engine = create_engine('sqlite:///')
class Person(Entity):
using_options(session=None)
firstname = Field(String(30))
surname = Field(String(30))
setup_all()
create_all(engine)
Session = sessionmaker(bind=engine)
session = Session()
homer = Person(firstname="Homer", surname='Simpson')
bart = Person(firstname="Bart", surname='Simpson')
session.save(homer)
session.save(bart)
session.commit()
bart.delete()
session.commit()
assert session.query(Person).filter_by(firstname='Homer').one() is homer
assert session.query(Person).count() == 1
def test_scoped_session(self):
engine = create_engine('sqlite:///')
Session = scoped_session(sessionmaker(bind=engine))
class Person(Entity):
using_options(session=Session)
firstname = Field(String(30))
surname = Field(String(30))
setup_all()
create_all(engine)
homer = Person(firstname="Homer", surname='Simpson')
bart = Person(firstname="Bart", surname='Simpson')
Session.commit()
assert Person.query.session is Session()
assert Person.query.filter_by(firstname='Homer').one() is homer
def test_global_scoped_session(self):
global __session__
engine = create_engine('sqlite:///')
session = scoped_session(sessionmaker(bind=engine))
__session__ = session
class Person(Entity):
firstname = Field(String(30))
surname = Field(String(30))
setup_all()
create_all(engine)
homer = Person(firstname="Homer", surname='Simpson')
bart = Person(firstname="Bart", surname='Simpson')
session.commit()
assert Person.query.session is session()
assert Person.query.filter_by(firstname='Homer').one() is homer
del __session__
class TestTableOptions(object):
def setup(self):
metadata.bind = 'sqlite:///'
def teardown(self):
cleanup_all()
def test_unique_constraint(self):
class Person(Entity):
firstname = Field(String(30))
surname = Field(String(30))
using_table_options(UniqueConstraint('firstname', 'surname'))
setup_all(True)
homer = Person(firstname="Homer", surname='Simpson')
bart = Person(firstname="Bart", surname='Simpson')
session.commit()
homer2 = Person(firstname="Homer", surname='Simpson')
raised = False
try:
session.commit()
except SQLError:
raised = True
assert raised
def test_unique_constraint_many_to_one(self):
class Author(Entity):
name = Field(String(50))
class Book(Entity):
title = Field(String(200), required=True)
author = ManyToOne("Author")
using_table_options(UniqueConstraint("title", "author_id"))
setup_all(True)
tolkien = Author(name="J. R. R. Tolkien")
lotr = Book(title="The Lord of the Rings", author=tolkien)
hobbit = Book(title="The Hobbit", author=tolkien)
session.commit()
tolkien2 = Author(name="Tolkien")
hobbit2 = Book(title="The Hobbit", author=tolkien2)
session.commit()
hobbit3 = Book(title="The Hobbit", author=tolkien)
raised = False
try:
session.commit()
except SQLError:
raised = True
assert raised
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