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|
from sqlalchemy.testing import eq_, assert_raises, \
assert_raises_message
from sqlalchemy import exc as sa_exc, util, Integer, String, ForeignKey
from sqlalchemy.orm import exc as orm_exc, mapper, relationship, \
sessionmaker, Session, defer
from sqlalchemy import testing
from sqlalchemy.testing import profiling
from sqlalchemy.testing import fixtures
from sqlalchemy.testing.schema import Table, Column
import sys
class MergeTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
Table('parent', metadata, Column('id', Integer,
primary_key=True,
test_needs_autoincrement=True), Column('data',
String(20)))
Table('child', metadata, Column('id', Integer,
primary_key=True, test_needs_autoincrement=True),
Column('data', String(20)), Column('parent_id',
Integer, ForeignKey('parent.id'), nullable=False))
@classmethod
def setup_classes(cls):
class Parent(cls.Basic):
pass
class Child(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
Child, Parent, parent, child = (cls.classes.Child,
cls.classes.Parent,
cls.tables.parent,
cls.tables.child)
mapper(Parent, parent, properties={'children':
relationship(Child, backref='parent')})
mapper(Child, child)
@classmethod
def insert_data(cls):
parent, child = cls.tables.parent, cls.tables.child
parent.insert().execute({'id': 1, 'data': 'p1'})
child.insert().execute({'id': 1, 'data': 'p1c1', 'parent_id': 1})
def test_merge_no_load(self):
Parent = self.classes.Parent
sess = sessionmaker()()
sess2 = sessionmaker()()
p1 = sess.query(Parent).get(1)
p1.children
# down from 185 on this this is a small slice of a usually
# bigger operation so using a small variance
@profiling.function_call_count(variance=0.10)
def go1():
return sess2.merge(p1, load=False)
p2 = go1()
# third call, merge object already present. almost no calls.
@profiling.function_call_count(variance=0.10)
def go2():
return sess2.merge(p2, load=False)
go2()
def test_merge_load(self):
Parent = self.classes.Parent
sess = sessionmaker()()
sess2 = sessionmaker()()
p1 = sess.query(Parent).get(1)
p1.children
# preloading of collection took this down from 1728 to 1192
# using sqlite3 the C extension took it back up to approx. 1257
# (py2.6)
@profiling.function_call_count()
def go():
p2 = sess2.merge(p1)
go()
# one more time, count the SQL
def go2():
p2 = sess2.merge(p1)
sess2 = sessionmaker(testing.db)()
self.assert_sql_count(testing.db, go2, 2)
class LoadManyToOneFromIdentityTest(fixtures.MappedTest):
"""test overhead associated with many-to-one fetches.
Prior to the refactor of LoadLazyAttribute and
query._get(), the load from identity map took 2x
as many calls (65K calls here instead of around 33K)
to load 1000 related objects from the identity map.
"""
@classmethod
def define_tables(cls, metadata):
Table('parent', metadata,
Column('id', Integer, primary_key=True),
Column('data', String(20)),
Column('child_id', Integer, ForeignKey('child.id'))
)
Table('child', metadata,
Column('id', Integer, primary_key=True),
Column('data', String(20))
)
@classmethod
def setup_classes(cls):
class Parent(cls.Basic):
pass
class Child(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
Child, Parent, parent, child = (cls.classes.Child,
cls.classes.Parent,
cls.tables.parent,
cls.tables.child)
mapper(Parent, parent, properties={
'child': relationship(Child)})
mapper(Child, child)
@classmethod
def insert_data(cls):
parent, child = cls.tables.parent, cls.tables.child
child.insert().execute([
{'id':i, 'data':'c%d' % i}
for i in range(1, 251)
])
parent.insert().execute([
{
'id':i,
'data':'p%dc%d' % (i, (i % 250) + 1),
'child_id':(i % 250) + 1
}
for i in range(1, 1000)
])
def test_many_to_one_load_no_identity(self):
Parent = self.classes.Parent
sess = Session()
parents = sess.query(Parent).all()
@profiling.function_call_count(variance=.2)
def go():
for p in parents:
p.child
go()
def test_many_to_one_load_identity(self):
Parent, Child = self.classes.Parent, self.classes.Child
sess = Session()
parents = sess.query(Parent).all()
children = sess.query(Child).all()
@profiling.function_call_count()
def go():
for p in parents:
p.child
go()
class MergeBackrefsTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
Table('a', metadata,
Column('id', Integer, primary_key=True),
Column('c_id', Integer, ForeignKey('c.id'))
)
Table('b', metadata,
Column('id', Integer, primary_key=True),
Column('a_id', Integer, ForeignKey('a.id'))
)
Table('c', metadata,
Column('id', Integer, primary_key=True),
)
Table('d', metadata,
Column('id', Integer, primary_key=True),
Column('a_id', Integer, ForeignKey('a.id'))
)
@classmethod
def setup_classes(cls):
class A(cls.Basic):
pass
class B(cls.Basic):
pass
class C(cls.Basic):
pass
class D(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
A, B, C, D = cls.classes.A, cls.classes.B, \
cls.classes.C, cls.classes.D
a, b, c, d = cls.tables.a, cls.tables.b, \
cls.tables.c, cls.tables.d
mapper(A, a, properties={
'bs': relationship(B, backref='a'),
'c': relationship(C, backref='as'),
'ds': relationship(D, backref='a'),
})
mapper(B, b)
mapper(C, c)
mapper(D, d)
@classmethod
def insert_data(cls):
A, B, C, D = cls.classes.A, cls.classes.B, \
cls.classes.C, cls.classes.D
s = Session()
s.add_all([
A(id=i,
bs=[B(id=(i * 5) + j) for j in range(1, 5)],
c=C(id=i),
ds=[D(id=(i * 5) + j) for j in range(1, 5)]
)
for i in range(1, 5)
])
s.commit()
@profiling.function_call_count(variance=.10)
def test_merge_pending_with_all_pks(self):
A, B, C, D = self.classes.A, self.classes.B, \
self.classes.C, self.classes.D
s = Session()
for a in [
A(id=i,
bs=[B(id=(i * 5) + j) for j in range(1, 5)],
c=C(id=i),
ds=[D(id=(i * 5) + j) for j in range(1, 5)]
)
for i in range(1, 5)
]:
s.merge(a)
class DeferOptionsTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
Table('a', metadata,
Column('id', Integer, primary_key=True),
Column('x', String(5)),
Column('y', String(5)),
Column('z', String(5)),
Column('q', String(5)),
Column('p', String(5)),
Column('r', String(5)),
)
@classmethod
def setup_classes(cls):
class A(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
A = cls.classes.A
a = cls.tables.a
mapper(A, a)
@classmethod
def insert_data(cls):
A = cls.classes.A
s = Session()
s.add_all([
A(id=i,
**dict((letter, "%s%d" % (letter, i)) for letter in
['x', 'y', 'z', 'p', 'q', 'r'])
) for i in range(1, 1001)
])
s.commit()
@profiling.function_call_count(variance=.10)
def test_baseline(self):
# as of [ticket:2778], this is at 39025
A = self.classes.A
s = Session()
s.query(A).all()
@profiling.function_call_count(variance=.10)
def test_defer_many_cols(self):
# with [ticket:2778], this goes from 50805 to 32817,
# as it should be fewer function calls than the baseline
A = self.classes.A
s = Session()
s.query(A).options(
*[defer(letter) for letter in ['x', 'y', 'z', 'p', 'q', 'r']]).\
all()
class AttributeOverheadTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
Table('parent', metadata, Column('id', Integer,
primary_key=True,
test_needs_autoincrement=True), Column('data',
String(20)))
Table('child', metadata, Column('id', Integer,
primary_key=True, test_needs_autoincrement=True),
Column('data', String(20)), Column('parent_id',
Integer, ForeignKey('parent.id'), nullable=False))
@classmethod
def setup_classes(cls):
class Parent(cls.Basic):
pass
class Child(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
Child, Parent, parent, child = (cls.classes.Child,
cls.classes.Parent,
cls.tables.parent,
cls.tables.child)
mapper(Parent, parent, properties={'children':
relationship(Child, backref='parent')})
mapper(Child, child)
def test_attribute_set(self):
Parent, Child = self.classes.Parent, self.classes.Child
p1 = Parent()
c1 = Child()
@profiling.function_call_count()
def go():
for i in range(30):
c1.parent = p1
c1.parent = None
c1.parent = p1
del c1.parent
go()
def test_collection_append_remove(self):
Parent, Child = self.classes.Parent, self.classes.Child
p1 = Parent()
children = [Child() for i in range(100)]
@profiling.function_call_count()
def go():
for child in children:
p1.children.append(child)
for child in children:
p1.children.remove(child)
go()
|
