mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-05-12 03:38:35 -04:00
Mike Bayer
338 lines
12 KiB
Python
338 lines
12 KiB
Python
import testenv; testenv.configure_for_tests()
|
|
from sqlalchemy import *
|
|
from sqlalchemy import exc
|
|
from testlib import *
|
|
from testlib import config, engines
|
|
|
|
class ConstraintTest(TestBase, AssertsExecutionResults):
|
|
|
|
def setUp(self):
|
|
global metadata
|
|
metadata = MetaData(testing.db)
|
|
|
|
def tearDown(self):
|
|
metadata.drop_all()
|
|
|
|
def test_constraint(self):
|
|
employees = Table('employees', metadata,
|
|
Column('id', Integer),
|
|
Column('soc', String(40)),
|
|
Column('name', String(30)),
|
|
PrimaryKeyConstraint('id', 'soc')
|
|
)
|
|
elements = Table('elements', metadata,
|
|
Column('id', Integer),
|
|
Column('stuff', String(30)),
|
|
Column('emp_id', Integer),
|
|
Column('emp_soc', String(40)),
|
|
PrimaryKeyConstraint('id', name='elements_primkey'),
|
|
ForeignKeyConstraint(['emp_id', 'emp_soc'], ['employees.id', 'employees.soc'])
|
|
)
|
|
metadata.create_all()
|
|
|
|
def test_double_fk_usage_raises(self):
|
|
f = ForeignKey('b.id')
|
|
|
|
self.assertRaises(exc.InvalidRequestError, Table, "a", metadata,
|
|
Column('x', Integer, f),
|
|
Column('y', Integer, f)
|
|
)
|
|
|
|
|
|
def test_circular_constraint(self):
|
|
a = Table("a", metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('bid', Integer),
|
|
ForeignKeyConstraint(["bid"], ["b.id"], name="afk")
|
|
)
|
|
b = Table("b", metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column("aid", Integer),
|
|
ForeignKeyConstraint(["aid"], ["a.id"], use_alter=True, name="bfk")
|
|
)
|
|
metadata.create_all()
|
|
|
|
def test_circular_constraint_2(self):
|
|
a = Table("a", metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('bid', Integer, ForeignKey("b.id")),
|
|
)
|
|
b = Table("b", metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column("aid", Integer, ForeignKey("a.id", use_alter=True, name="bfk")),
|
|
)
|
|
metadata.create_all()
|
|
|
|
@testing.fails_on('mysql')
|
|
def test_check_constraint(self):
|
|
foo = Table('foo', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('x', Integer),
|
|
Column('y', Integer),
|
|
CheckConstraint('x>y'))
|
|
bar = Table('bar', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('x', Integer, CheckConstraint('x>7')),
|
|
Column('z', Integer)
|
|
)
|
|
|
|
metadata.create_all()
|
|
foo.insert().execute(id=1,x=9,y=5)
|
|
try:
|
|
foo.insert().execute(id=2,x=5,y=9)
|
|
assert False
|
|
except exc.SQLError:
|
|
assert True
|
|
|
|
bar.insert().execute(id=1,x=10)
|
|
try:
|
|
bar.insert().execute(id=2,x=5)
|
|
assert False
|
|
except exc.SQLError:
|
|
assert True
|
|
|
|
def test_unique_constraint(self):
|
|
foo = Table('foo', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('value', String(30), unique=True))
|
|
bar = Table('bar', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('value', String(30)),
|
|
Column('value2', String(30)),
|
|
UniqueConstraint('value', 'value2', name='uix1')
|
|
)
|
|
metadata.create_all()
|
|
foo.insert().execute(id=1, value='value1')
|
|
foo.insert().execute(id=2, value='value2')
|
|
bar.insert().execute(id=1, value='a', value2='a')
|
|
bar.insert().execute(id=2, value='a', value2='b')
|
|
try:
|
|
foo.insert().execute(id=3, value='value1')
|
|
assert False
|
|
except exc.SQLError:
|
|
assert True
|
|
try:
|
|
bar.insert().execute(id=3, value='a', value2='b')
|
|
assert False
|
|
except exc.SQLError:
|
|
assert True
|
|
|
|
def test_index_create(self):
|
|
employees = Table('employees', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('first_name', String(30)),
|
|
Column('last_name', String(30)),
|
|
Column('email_address', String(30)))
|
|
employees.create()
|
|
|
|
i = Index('employee_name_index',
|
|
employees.c.last_name, employees.c.first_name)
|
|
i.create()
|
|
assert i in employees.indexes
|
|
|
|
i2 = Index('employee_email_index',
|
|
employees.c.email_address, unique=True)
|
|
i2.create()
|
|
assert i2 in employees.indexes
|
|
|
|
def test_index_create_camelcase(self):
|
|
"""test that mixed-case index identifiers are legal"""
|
|
employees = Table('companyEmployees', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('firstName', String(30)),
|
|
Column('lastName', String(30)),
|
|
Column('emailAddress', String(30)))
|
|
|
|
employees.create()
|
|
|
|
i = Index('employeeNameIndex',
|
|
employees.c.lastName, employees.c.firstName)
|
|
i.create()
|
|
|
|
i = Index('employeeEmailIndex',
|
|
employees.c.emailAddress, unique=True)
|
|
i.create()
|
|
|
|
# Check that the table is useable. This is mostly for pg,
|
|
# which can be somewhat sticky with mixed-case identifiers
|
|
employees.insert().execute(firstName='Joe', lastName='Smith', id=0)
|
|
ss = employees.select().execute().fetchall()
|
|
assert ss[0].firstName == 'Joe'
|
|
assert ss[0].lastName == 'Smith'
|
|
|
|
def test_index_create_inline(self):
|
|
"""Test indexes defined with tables"""
|
|
|
|
events = Table('events', metadata,
|
|
Column('id', Integer, primary_key=True),
|
|
Column('name', String(30), index=True, unique=True),
|
|
Column('location', String(30), index=True),
|
|
Column('sport', String(30)),
|
|
Column('announcer', String(30)),
|
|
Column('winner', String(30)))
|
|
|
|
Index('sport_announcer', events.c.sport, events.c.announcer, unique=True)
|
|
Index('idx_winners', events.c.winner)
|
|
|
|
index_names = [ ix.name for ix in events.indexes ]
|
|
assert 'ix_events_name' in index_names
|
|
assert 'ix_events_location' in index_names
|
|
assert 'sport_announcer' in index_names
|
|
assert 'idx_winners' in index_names
|
|
assert len(index_names) == 4
|
|
|
|
capt = []
|
|
connection = testing.db.connect()
|
|
# TODO: hacky, put a real connection proxy in
|
|
ex = connection._Connection__execute_context
|
|
def proxy(context):
|
|
capt.append(context.statement)
|
|
capt.append(repr(context.parameters))
|
|
ex(context)
|
|
connection._Connection__execute_context = proxy
|
|
schemagen = testing.db.dialect.schemagenerator(testing.db.dialect, connection)
|
|
schemagen.traverse(events)
|
|
|
|
assert capt[0].strip().startswith('CREATE TABLE events')
|
|
|
|
s = set([capt[x].strip() for x in [2,4,6,8]])
|
|
|
|
assert s == set([
|
|
'CREATE UNIQUE INDEX ix_events_name ON events (name)',
|
|
'CREATE INDEX ix_events_location ON events (location)',
|
|
'CREATE UNIQUE INDEX sport_announcer ON events (sport, announcer)',
|
|
'CREATE INDEX idx_winners ON events (winner)'
|
|
])
|
|
|
|
# verify that the table is functional
|
|
events.insert().execute(id=1, name='hockey finals', location='rink',
|
|
sport='hockey', announcer='some canadian',
|
|
winner='sweden')
|
|
ss = events.select().execute().fetchall()
|
|
|
|
def test_too_long_idx_name(self):
|
|
dialect = testing.db.dialect.__class__()
|
|
dialect.max_identifier_length = 20
|
|
|
|
schemagen = dialect.schemagenerator(dialect, None)
|
|
schemagen.execute = lambda : None
|
|
|
|
t1 = Table("sometable", MetaData(), Column("foo", Integer))
|
|
schemagen.visit_index(Index("this_name_is_too_long_for_what_were_doing", t1.c.foo))
|
|
self.assertEquals(schemagen.buffer.getvalue(), "CREATE INDEX this_name_is_t_1 ON sometable (foo)")
|
|
schemagen.buffer.truncate(0)
|
|
schemagen.visit_index(Index("this_other_name_is_too_long_for_what_were_doing", t1.c.foo))
|
|
self.assertEquals(schemagen.buffer.getvalue(), "CREATE INDEX this_other_nam_2 ON sometable (foo)")
|
|
|
|
schemadrop = dialect.schemadropper(dialect, None)
|
|
schemadrop.execute = lambda: None
|
|
self.assertRaises(exc.IdentifierError, schemadrop.visit_index, Index("this_name_is_too_long_for_what_were_doing", t1.c.foo))
|
|
|
|
|
|
class ConstraintCompilationTest(TestBase, AssertsExecutionResults):
|
|
class accum(object):
|
|
def __init__(self):
|
|
self.statements = []
|
|
def __call__(self, sql, *a, **kw):
|
|
self.statements.append(sql)
|
|
def __contains__(self, substring):
|
|
for s in self.statements:
|
|
if substring in s:
|
|
return True
|
|
return False
|
|
def __str__(self):
|
|
return '\n'.join([repr(x) for x in self.statements])
|
|
def clear(self):
|
|
del self.statements[:]
|
|
|
|
def setUp(self):
|
|
self.sql = self.accum()
|
|
opts = config.db_opts.copy()
|
|
opts['strategy'] = 'mock'
|
|
opts['executor'] = self.sql
|
|
self.engine = engines.testing_engine(options=opts)
|
|
|
|
|
|
def _test_deferrable(self, constraint_factory):
|
|
meta = MetaData(self.engine)
|
|
t = Table('tbl', meta,
|
|
Column('a', Integer),
|
|
Column('b', Integer),
|
|
constraint_factory(deferrable=True))
|
|
t.create()
|
|
assert 'DEFERRABLE' in self.sql, self.sql
|
|
assert 'NOT DEFERRABLE' not in self.sql, self.sql
|
|
self.sql.clear()
|
|
meta.clear()
|
|
|
|
t = Table('tbl', meta,
|
|
Column('a', Integer),
|
|
Column('b', Integer),
|
|
constraint_factory(deferrable=False))
|
|
t.create()
|
|
assert 'NOT DEFERRABLE' in self.sql
|
|
self.sql.clear()
|
|
meta.clear()
|
|
|
|
t = Table('tbl', meta,
|
|
Column('a', Integer),
|
|
Column('b', Integer),
|
|
constraint_factory(deferrable=True, initially='IMMEDIATE'))
|
|
t.create()
|
|
assert 'NOT DEFERRABLE' not in self.sql
|
|
assert 'INITIALLY IMMEDIATE' in self.sql
|
|
self.sql.clear()
|
|
meta.clear()
|
|
|
|
t = Table('tbl', meta,
|
|
Column('a', Integer),
|
|
Column('b', Integer),
|
|
constraint_factory(deferrable=True, initially='DEFERRED'))
|
|
t.create()
|
|
|
|
assert 'NOT DEFERRABLE' not in self.sql
|
|
assert 'INITIALLY DEFERRED' in self.sql, self.sql
|
|
|
|
def test_deferrable_pk(self):
|
|
factory = lambda **kw: PrimaryKeyConstraint('a', **kw)
|
|
self._test_deferrable(factory)
|
|
|
|
def test_deferrable_table_fk(self):
|
|
factory = lambda **kw: ForeignKeyConstraint(['b'], ['tbl.a'], **kw)
|
|
self._test_deferrable(factory)
|
|
|
|
def test_deferrable_column_fk(self):
|
|
meta = MetaData(self.engine)
|
|
t = Table('tbl', meta,
|
|
Column('a', Integer),
|
|
Column('b', Integer,
|
|
ForeignKey('tbl.a', deferrable=True,
|
|
initially='DEFERRED')))
|
|
t.create()
|
|
assert 'DEFERRABLE' in self.sql, self.sql
|
|
assert 'INITIALLY DEFERRED' in self.sql, self.sql
|
|
|
|
def test_deferrable_unique(self):
|
|
factory = lambda **kw: UniqueConstraint('b', **kw)
|
|
self._test_deferrable(factory)
|
|
|
|
def test_deferrable_table_check(self):
|
|
factory = lambda **kw: CheckConstraint('a < b', **kw)
|
|
self._test_deferrable(factory)
|
|
|
|
def test_deferrable_column_check(self):
|
|
meta = MetaData(self.engine)
|
|
t = Table('tbl', meta,
|
|
Column('a', Integer),
|
|
Column('b', Integer,
|
|
CheckConstraint('a < b',
|
|
deferrable=True,
|
|
initially='DEFERRED')))
|
|
t.create()
|
|
assert 'DEFERRABLE' in self.sql, self.sql
|
|
assert 'INITIALLY DEFERRED' in self.sql, self.sql
|
|
|
|
|
|
if __name__ == "__main__":
|
|
testenv.main()
|