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|
import sqlalchemy as sa
from sqlalchemy import Computed
from sqlalchemy import event
from sqlalchemy import Integer
from sqlalchemy import String
from sqlalchemy import testing
from sqlalchemy.orm import create_session
from sqlalchemy.orm import mapper
from sqlalchemy.orm import Session
from sqlalchemy.testing import eq_
from sqlalchemy.testing import fixtures
from sqlalchemy.testing.assertsql import assert_engine
from sqlalchemy.testing.assertsql import CompiledSQL
from sqlalchemy.testing.assertsql import Conditional
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"
).execute_if(dialect="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);"
).execute_if(dialect="mssql"),
sa.DDL(
"CREATE TRIGGER dt_ins BEFORE INSERT "
"ON dt "
"FOR EACH ROW "
"BEGIN "
":NEW.col2 := 'ins'; :NEW.col4 := 'ins'; END;"
).execute_if(dialect="oracle"),
sa.DDL(
"CREATE TRIGGER dt_ins BEFORE INSERT ON dt "
"FOR EACH ROW BEGIN "
"SET NEW.col2='ins'; SET NEW.col4='ins'; END"
).execute_if(
callable_=lambda ddl, 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"
).execute_if(dialect="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);"
).execute_if(dialect="mssql"),
sa.DDL(
"CREATE TRIGGER dt_up BEFORE UPDATE ON dt "
"FOR EACH ROW BEGIN "
":NEW.col3 := 'up'; :NEW.col4 := 'up'; END;"
).execute_if(dialect="oracle"),
sa.DDL(
"CREATE TRIGGER dt_up BEFORE UPDATE ON dt "
"FOR EACH ROW BEGIN "
"SET NEW.col3='up'; SET NEW.col4='up'; END"
).execute_if(
callable_=lambda ddl, 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):
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")])
class ComputedDefaultsOnUpdateTest(fixtures.MappedTest):
"""test that computed columns are recognized as server
oninsert/onupdate defaults."""
__backend__ = True
__requires__ = ("computed_columns",)
@classmethod
def define_tables(cls, metadata):
Table(
"test",
metadata,
Column("id", Integer, primary_key=True),
Column("foo", Integer),
Column("bar", Integer, Computed("foo + 42")),
)
@classmethod
def setup_classes(cls):
class Thing(cls.Basic):
pass
class ThingNoEager(cls.Basic):
pass
@classmethod
def setup_mappers(cls):
Thing = cls.classes.Thing
mapper(Thing, cls.tables.test, eager_defaults=True)
ThingNoEager = cls.classes.ThingNoEager
mapper(ThingNoEager, cls.tables.test, eager_defaults=False)
@testing.combinations(("eager", True), ("noneager", False), id_="ia")
def test_insert_computed(self, eager):
if eager:
Thing = self.classes.Thing
else:
Thing = self.classes.ThingNoEager
s = Session()
t1, t2 = (Thing(id=1, foo=5), Thing(id=2, foo=10))
s.add_all([t1, t2])
with assert_engine(testing.db) as asserter:
s.flush()
eq_(t1.bar, 5 + 42)
eq_(t2.bar, 10 + 42)
asserter.assert_(
Conditional(
eager and testing.db.dialect.implicit_returning,
[
Conditional(
testing.db.dialect.insert_executemany_returning,
[
CompiledSQL(
"INSERT INTO test (id, foo) "
"VALUES (%(id)s, %(foo)s) "
"RETURNING test.bar",
[{"foo": 5, "id": 1}, {"foo": 10, "id": 2}],
dialect="postgresql",
),
],
[
CompiledSQL(
"INSERT INTO test (id, foo) "
"VALUES (%(id)s, %(foo)s) "
"RETURNING test.bar",
[{"foo": 5, "id": 1}],
dialect="postgresql",
),
CompiledSQL(
"INSERT INTO test (id, foo) "
"VALUES (%(id)s, %(foo)s) "
"RETURNING test.bar",
[{"foo": 10, "id": 2}],
dialect="postgresql",
),
],
)
],
[
CompiledSQL(
"INSERT INTO test (id, foo) VALUES (:id, :foo)",
[{"foo": 5, "id": 1}, {"foo": 10, "id": 2}],
),
CompiledSQL(
"SELECT test.bar AS test_bar FROM test "
"WHERE test.id = :param_1",
[{"param_1": 1}],
),
CompiledSQL(
"SELECT test.bar AS test_bar FROM test "
"WHERE test.id = :param_1",
[{"param_1": 2}],
),
],
)
)
@testing.combinations(
(
"eagerload",
True,
testing.requires.computed_columns_on_update_returning,
),
("noneagerload", False,),
id_="ia",
)
def test_update_computed(self, eager):
if eager:
Thing = self.classes.Thing
else:
Thing = self.classes.ThingNoEager
s = Session()
t1, t2 = (Thing(id=1, foo=1), Thing(id=2, foo=2))
s.add_all([t1, t2])
s.flush()
t1.foo = 5
t2.foo = 6
with assert_engine(testing.db) as asserter:
s.flush()
eq_(t1.bar, 5 + 42)
eq_(t2.bar, 6 + 42)
if eager and testing.db.dialect.implicit_returning:
asserter.assert_(
CompiledSQL(
"UPDATE test SET foo=%(foo)s "
"WHERE test.id = %(test_id)s "
"RETURNING test.bar",
[{"foo": 5, "test_id": 1}],
dialect="postgresql",
),
CompiledSQL(
"UPDATE test SET foo=%(foo)s "
"WHERE test.id = %(test_id)s "
"RETURNING test.bar",
[{"foo": 6, "test_id": 2}],
dialect="postgresql",
),
)
elif eager:
asserter.assert_(
CompiledSQL(
"UPDATE test SET foo=:foo WHERE test.id = :test_id",
[{"foo": 5, "test_id": 1}],
),
CompiledSQL(
"UPDATE test SET foo=:foo WHERE test.id = :test_id",
[{"foo": 6, "test_id": 2}],
),
CompiledSQL(
"SELECT test.bar AS test_bar FROM test "
"WHERE test.id = :param_1",
[{"param_1": 1}],
),
CompiledSQL(
"SELECT test.bar AS test_bar FROM test "
"WHERE test.id = :param_1",
[{"param_1": 2}],
),
)
else:
asserter.assert_(
CompiledSQL(
"UPDATE test SET foo=:foo WHERE test.id = :test_id",
[{"foo": 5, "test_id": 1}, {"foo": 6, "test_id": 2}],
),
CompiledSQL(
"SELECT test.bar AS test_bar FROM test "
"WHERE test.id = :param_1",
[{"param_1": 1}],
),
CompiledSQL(
"SELECT test.bar AS test_bar FROM test "
"WHERE test.id = :param_1",
[{"param_1": 2}],
),
)
|
