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import sqlalchemy as sa
from sqlalchemy import event
from sqlalchemy import Integer
from sqlalchemy import String
from sqlalchemy.orm import create_session
from sqlalchemy.orm import mapper
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
from sqlalchemy.testing.schema import Column
from sqlalchemy.testing.schema import Table
class TriggerDefaultsTest(fixtures.MappedTest):
__requires__ = ("row_triggers",)
@classmethod
def define_tables(cls, metadata):
dt = Table(
"dt",
metadata,
Column(
"id", Integer, primary_key=True, test_needs_autoincrement=True
),
Column("col1", String(20)),
Column(
"col2", String(20), server_default=sa.schema.FetchedValue()
),
Column(
"col3", String(20), sa.schema.FetchedValue(for_update=True)
),
Column(
"col4",
String(20),
sa.schema.FetchedValue(),
sa.schema.FetchedValue(for_update=True),
),
)
for ins in (
sa.DDL(
"CREATE TRIGGER dt_ins AFTER INSERT ON dt "
"FOR EACH ROW BEGIN "
"UPDATE dt SET col2='ins', col4='ins' "
"WHERE dt.id = NEW.id; END",
on="sqlite",
),
sa.DDL(
"CREATE TRIGGER dt_ins ON dt AFTER INSERT AS "
"UPDATE dt SET col2='ins', col4='ins' "
"WHERE dt.id IN (SELECT id FROM inserted);",
on="mssql",
),
sa.DDL(
"CREATE TRIGGER dt_ins BEFORE INSERT "
"ON dt "
"FOR EACH ROW "
"BEGIN "
":NEW.col2 := 'ins'; :NEW.col4 := 'ins'; END;",
on="oracle",
),
sa.DDL(
"CREATE TRIGGER dt_ins BEFORE INSERT ON dt "
"FOR EACH ROW BEGIN "
"SET NEW.col2='ins'; SET NEW.col4='ins'; END",
on=lambda ddl, event, target, bind, **kw: bind.engine.name
not in ("oracle", "mssql", "sqlite"),
),
):
event.listen(dt, "after_create", ins)
event.listen(dt, "before_drop", sa.DDL("DROP TRIGGER dt_ins"))
for up in (
sa.DDL(
"CREATE TRIGGER dt_up AFTER UPDATE ON dt "
"FOR EACH ROW BEGIN "
"UPDATE dt SET col3='up', col4='up' "
"WHERE dt.id = OLD.id; END",
on="sqlite",
),
sa.DDL(
"CREATE TRIGGER dt_up ON dt AFTER UPDATE AS "
"UPDATE dt SET col3='up', col4='up' "
"WHERE dt.id IN (SELECT id FROM deleted);",
on="mssql",
),
sa.DDL(
"CREATE TRIGGER dt_up BEFORE UPDATE ON dt "
"FOR EACH ROW BEGIN "
":NEW.col3 := 'up'; :NEW.col4 := 'up'; END;",
on="oracle",
),
sa.DDL(
"CREATE TRIGGER dt_up BEFORE UPDATE ON dt "
"FOR EACH ROW BEGIN "
"SET NEW.col3='up'; SET NEW.col4='up'; END",
on=lambda ddl, event, target, bind, **kw: bind.engine.name
not in ("oracle", "mssql", "sqlite"),
),
):
event.listen(dt, "after_create", up)
event.listen(dt, "before_drop", sa.DDL("DROP TRIGGER dt_up"))
@classmethod
def setup_classes(cls):
class Default(cls.Comparable):
pass
@classmethod
def setup_mappers(cls):
Default, dt = cls.classes.Default, cls.tables.dt
mapper(Default, dt)
def test_insert(self):
Default = self.classes.Default
d1 = Default(id=1)
eq_(d1.col1, None)
eq_(d1.col2, None)
eq_(d1.col3, None)
eq_(d1.col4, None)
session = create_session()
session.add(d1)
session.flush()
eq_(d1.col1, None)
eq_(d1.col2, "ins")
eq_(d1.col3, None)
# don't care which trigger fired
assert d1.col4 in ("ins", "up")
def test_update(self):
Default = self.classes.Default
d1 = Default(id=1)
session = create_session()
session.add(d1)
session.flush()
d1.col1 = "set"
session.flush()
eq_(d1.col1, "set")
eq_(d1.col2, "ins")
eq_(d1.col3, "up")
eq_(d1.col4, "up")
class ExcludedDefaultsTest(fixtures.MappedTest):
@classmethod
def define_tables(cls, metadata):
dt = Table(
"dt",
metadata,
Column(
"id", Integer, primary_key=True, test_needs_autoincrement=True
),
Column("col1", String(20), default="hello"),
)
def test_exclude(self):
dt = self.tables.dt
class Foo(fixtures.BasicEntity):
pass
mapper(Foo, dt, exclude_properties=("col1",))
f1 = Foo()
sess = create_session()
sess.add(f1)
sess.flush()
eq_(dt.select().execute().fetchall(), [(1, "hello")])
|
