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from sqlalchemy import *
from sqlalchemy.orm import *
from sqlalchemy.test.compat import gc_collect
from sqlalchemy.test import TestBase, AssertsExecutionResults, profiling, testing
from test.orm import _fixtures
# in this test we are specifically looking for time spent in the attributes.InstanceState.__cleanup() method.
ITERATIONS = 100
class SessionTest(TestBase, AssertsExecutionResults):
@classmethod
def setup_class(cls):
global t1, t2, metadata,T1, T2
metadata = MetaData(testing.db)
t1 = Table('t1', metadata,
Column('c1', Integer, primary_key=True),
Column('c2', String(30)))
t2 = Table('t2', metadata,
Column('c1', Integer, primary_key=True),
Column('c2', String(30)),
Column('t1id', Integer, ForeignKey('t1.c1'))
)
metadata.create_all()
l = []
for x in range(1,51):
l.append({'c2':'this is t1 #%d' % x})
t1.insert().execute(*l)
for x in range(1, 51):
l = []
for y in range(1, 100):
l.append({'c2':'this is t2 #%d' % y, 't1id':x})
t2.insert().execute(*l)
class T1(_fixtures.Base):
pass
class T2(_fixtures.Base):
pass
mapper(T1, t1, properties={
't2s':relationship(T2, backref='t1')
})
mapper(T2, t2)
@classmethod
def teardown_class(cls):
metadata.drop_all()
clear_mappers()
@profiling.profiled('clean', report=True)
def test_session_clean(self):
for x in range(0, ITERATIONS):
sess = create_session()
t1s = sess.query(T1).filter(T1.c1.between(15, 48)).all()
for index in [2, 7, 12, 15, 18, 20]:
t1s[index].t2s
sess.close()
del sess
gc_collect()
@profiling.profiled('dirty', report=True)
def test_session_dirty(self):
for x in range(0, ITERATIONS):
sess = create_session()
t1s = sess.query(T1).filter(T1.c1.between(15, 48)).all()
for index in [2, 7, 12, 15, 18, 20]:
t1s[index].c2 = 'this is some modified text'
for t2 in t1s[index].t2s:
t2.c2 = 'this is some modified text'
del t1s
gc_collect()
sess.close()
del sess
gc_collect()
@profiling.profiled('noclose', report=True)
def test_session_noclose(self):
for x in range(0, ITERATIONS):
sess = create_session()
t1s = sess.query(T1).filter(T1.c1.between(15, 48)).all()
for index in [2, 7, 12, 15, 18, 20]:
t1s[index].t2s
del sess
gc_collect()
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