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sqlalchemy/test/engine/test_reflection.py
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Mike Bayer cf62005639 test oracle 23c, mariadb12; reduce backend use 
one particular vector test wont run on oracle 23c free, so
just disable it.

added better skips for the rest of the vector tests and
fixed a deprecation issue.

this will be the first run on the new oracle23 on CI so we'll have to
see how this goes.

Also adjust for mariabdb12 being overly helpful with regards
to stale row updates.

as we are having trouble getting 23c to pass throug transaction
tests, i noted we have an explosion of tests due to the multiple
drivers, so this patch introduces __sparse_driver_backend__
for all tests where we want variety of
database server but there's no need to test every driver.
This should dramatically reduce the size of the test suite run

Change-Id: Ic8d3eb0a60e76b4c54c6bb4a721f90c81ede782b
2025-11-25 14:50:56 -05:00

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import itertools
import unicodedata
import sqlalchemy as sa
from sqlalchemy import Computed
from sqlalchemy import Connection
from sqlalchemy import DefaultClause
from sqlalchemy import event
from sqlalchemy import FetchedValue
from sqlalchemy import ForeignKey
from sqlalchemy import Identity
from sqlalchemy import Index
from sqlalchemy import inspect
from sqlalchemy import Integer
from sqlalchemy import MetaData
from sqlalchemy import schema
from sqlalchemy import select
from sqlalchemy import sql
from sqlalchemy import String
from sqlalchemy import testing
from sqlalchemy import UniqueConstraint
from sqlalchemy.engine import Inspector
from sqlalchemy.engine.reflection import cache
from sqlalchemy.sql.elements import quoted_name
from sqlalchemy.testing import assert_raises
from sqlalchemy.testing import assert_raises_message
from sqlalchemy.testing import AssertsCompiledSQL
from sqlalchemy.testing import ComparesTables
from sqlalchemy.testing import config
from sqlalchemy.testing import eq_
from sqlalchemy.testing import eq_regex
from sqlalchemy.testing import expect_raises_message
from sqlalchemy.testing import expect_warnings
from sqlalchemy.testing import fixtures
from sqlalchemy.testing import in_
from sqlalchemy.testing import is_
from sqlalchemy.testing import is_false
from sqlalchemy.testing import is_instance_of
from sqlalchemy.testing import is_not
from sqlalchemy.testing import is_true
from sqlalchemy.testing import mock
from sqlalchemy.testing import not_in
from sqlalchemy.testing import skip
from sqlalchemy.testing.provision import normalize_sequence
from sqlalchemy.testing.schema import Column
from sqlalchemy.testing.schema import Table
class ReflectionTest(fixtures.TestBase, ComparesTables):
__sparse_driver_backend__ = True
def test_basic_reflection(self, connection, metadata):
meta = metadata
users = Table(
"engine_users",
meta,
Column("user_id", sa.INT, primary_key=True),
Column("user_name", sa.VARCHAR(20), nullable=False),
Column("test1", sa.CHAR(5), nullable=False),
Column("test2", sa.Float(), nullable=False),
Column("test3", sa.Text),
Column("test4", sa.Numeric(10, 2), nullable=False),
Column("test5", sa.Date),
Column(
"parent_user_id",
sa.Integer,
sa.ForeignKey("engine_users.user_id"),
),
Column("test6", sa.Date, nullable=False),
Column("test7", sa.Text),
Column("test8", sa.LargeBinary),
Column("test_passivedefault2", sa.Integer, server_default="5"),
Column("test9", sa.LargeBinary(100)),
Column("test10", sa.Numeric(10, 2)),
test_needs_fk=True,
)
addresses = Table(
"engine_email_addresses",
meta,
Column("address_id", sa.Integer, primary_key=True),
Column(
"remote_user_id", sa.Integer, sa.ForeignKey(users.c.user_id)
),
Column("email_address", sa.String(20)),
test_needs_fk=True,
)
meta.create_all(connection)
meta2 = MetaData()
reflected_users = Table(
"engine_users", meta2, autoload_with=connection
)
reflected_addresses = Table(
"engine_email_addresses",
meta2,
autoload_with=connection,
)
self.assert_tables_equal(users, reflected_users)
self.assert_tables_equal(addresses, reflected_addresses)
def test_autoload_with_imply_autoload(self, metadata, connection):
meta = metadata
t = Table(
"t",
meta,
Column("id", sa.Integer, primary_key=True),
Column("x", sa.String(20)),
Column("y", sa.Integer),
)
meta.create_all(connection)
meta2 = MetaData()
reflected_t = Table("t", meta2, autoload_with=connection)
self.assert_tables_equal(t, reflected_t)
def test_two_foreign_keys(self, metadata, connection):
meta = metadata
Table(
"t1",
meta,
Column("id", sa.Integer, primary_key=True),
Column("t2id", sa.Integer, sa.ForeignKey("t2.id")),
Column("t3id", sa.Integer, sa.ForeignKey("t3.id")),
test_needs_fk=True,
)
Table(
"t2",
meta,
Column("id", sa.Integer, primary_key=True),
test_needs_fk=True,
)
Table(
"t3",
meta,
Column("id", sa.Integer, primary_key=True),
test_needs_fk=True,
)
meta.create_all(connection)
meta2 = MetaData()
t1r, t2r, t3r = (
Table(x, meta2, autoload_with=connection)
for x in ("t1", "t2", "t3")
)
assert t1r.c.t2id.references(t2r.c.id)
assert t1r.c.t3id.references(t3r.c.id)
def test_resolve_fks_false_table(self, connection, metadata):
meta = metadata
Table(
"t1",
meta,
Column("id", sa.Integer, primary_key=True),
Column("t2id", sa.Integer, sa.ForeignKey("t2.id")),
test_needs_fk=True,
)
Table(
"t2",
meta,
Column("id", sa.Integer, primary_key=True),
test_needs_fk=True,
)
meta.create_all(connection)
meta2 = MetaData()
t1 = Table("t1", meta2, resolve_fks=False, autoload_with=connection)
in_("t1", meta2.tables)
not_in("t2", meta2.tables)
assert_raises(
sa.exc.NoReferencedTableError,
lambda: list(t1.c.t2id.foreign_keys)[0].column,
)
t2 = Table("t2", meta2, autoload_with=connection)
# now it resolves
is_true(t1.c.t2id.references(t2.c.id))
def test_resolve_fks_false_extend_existing(self, connection, metadata):
meta = metadata
Table(
"t1",
meta,
Column("id", sa.Integer, primary_key=True),
Column("t2id", sa.Integer, sa.ForeignKey("t2.id")),
test_needs_fk=True,
)
Table(
"t2",
meta,
Column("id", sa.Integer, primary_key=True),
test_needs_fk=True,
)
meta.create_all(connection)
meta2 = MetaData()
Table("t1", meta2)
in_("t1", meta2.tables)
t1 = Table(
"t1",
meta2,
resolve_fks=False,
autoload_with=connection,
extend_existing=True,
)
not_in("t2", meta2.tables)
assert_raises(
sa.exc.NoReferencedTableError,
lambda: list(t1.c.t2id.foreign_keys)[0].column,
)
t2 = Table("t2", meta2, autoload_with=connection)
# now it resolves
is_true(t1.c.t2id.references(t2.c.id))
def test_resolve_fks_false_metadata(self, connection, metadata):
meta = metadata
Table(
"t1",
meta,
Column("id", sa.Integer, primary_key=True),
Column("t2id", sa.Integer, sa.ForeignKey("t2.id")),
test_needs_fk=True,
)
Table(
"t2",
meta,
Column("id", sa.Integer, primary_key=True),
test_needs_fk=True,
)
meta.create_all(connection)
meta2 = MetaData()
meta2.reflect(connection, resolve_fks=False, only=["t1"])
in_("t1", meta2.tables)
not_in("t2", meta2.tables)
t1 = meta2.tables["t1"]
assert_raises(
sa.exc.NoReferencedTableError,
lambda: list(t1.c.t2id.foreign_keys)[0].column,
)
meta2.reflect(connection, resolve_fks=False)
t2 = meta2.tables["t2"]
is_true(t1.c.t2id.references(t2.c.id))
@testing.combinations(
"get_table_names",
"get_view_names",
"get_materialized_view_names",
argnames="method",
)
def test_reflect_forwards_multiple_kwargs(
self, connection, metadata, method
):
with mock.patch(
f"sqlalchemy.engine.reflection.Inspector.{method}",
return_value=set(),
) as mocked_method:
metadata.reflect(
bind=connection, flag1=True, flag2=123, flag3="abc", views=True
)
mocked_method.assert_called_once_with(
None, flag1=True, flag2=123, flag3="abc"
)
def test_nonexistent(self, connection):
meta = MetaData()
assert_raises(
sa.exc.NoSuchTableError,
Table,
"nonexistent",
meta,
autoload_with=connection,
)
assert "nonexistent" not in meta.tables
@testing.variation("use_metadata_reflect", [True, False])
def test_extend_existing(self, connection, metadata, use_metadata_reflect):
meta = metadata
Table(
"t",
meta,
Column("id", Integer, primary_key=True),
Column("x", Integer),
Column("y", Integer),
Column("z", Integer, server_default="5"),
)
meta.create_all(connection)
m2 = MetaData()
old_z = Column("z", String, primary_key=True)
old_y = Column("y", String)
old_q = Column("q", Integer)
t2 = Table("t", m2, old_z, old_q)
eq_(list(t2.primary_key.columns), [t2.c.z])
t2 = Table(
"t",
m2,
old_y,
extend_existing=True,
autoload_with=connection,
)
if use_metadata_reflect:
m2.reflect(connection, extend_existing=True)
eq_(set(t2.columns.keys()), {"x", "y", "z", "q", "id"})
# this has been the actual behavior, the cols are added together,
# however the test wasn't checking this correctly
eq_(list(t2.primary_key.columns), [t2.c.z, t2.c.id])
assert t2.c.z is not old_z
if not use_metadata_reflect:
assert t2.c.y is old_y
assert t2.c.z.type._type_affinity is Integer
assert t2.c.q is old_q
m3 = MetaData()
t3 = Table("t", m3, Column("z", Integer))
t3 = Table(
"t",
m3,
extend_existing=False,
autoload_with=connection,
)
if use_metadata_reflect:
m3.reflect(connection, extend_existing=False)
eq_(set(t3.columns.keys()), {"z"})
m4 = MetaData()
old_z = Column("z", String, primary_key=True)
old_y = Column("y", String)
old_q = Column("q", Integer)
t4 = Table("t", m4, old_z, old_q)
eq_(list(t4.primary_key.columns), [t4.c.z])
t4 = Table(
"t",
m4,
old_y,
extend_existing=True,
autoload_replace=False,
autoload_with=connection,
)
if use_metadata_reflect:
m4.reflect(
connection, extend_existing=True, autoload_replace=False
)
eq_(set(t4.columns.keys()), {"x", "y", "z", "q", "id"})
eq_(list(t4.primary_key.columns), [t4.c.z, t4.c.id])
assert t4.c.z is old_z
assert t4.c.y is old_y
assert t4.c.z.type._type_affinity is String
assert t4.c.q is old_q
@testing.variation(
"extend_type",
[
"autoload",
"metadata_reflect",
"metadata_reflect_no_replace",
"plain_table",
],
)
def test_extend_existing_never_dupe_column(
self, connection, metadata, extend_type
):
"""test #8925"""
meta = metadata
Table(
"t",
meta,
Column("id", Integer, primary_key=True),
Column("x", Integer),
Column("y", Integer),
)
meta.create_all(connection)
m2 = MetaData()
if extend_type.metadata_reflect:
t2 = Table(
"t",
m2,
Column("id", Integer, primary_key=True),
Column("x", Integer, key="x2"),
)
with expect_warnings(
'Column with user-specified key "x2" is being replaced '
'with plain named column "x", key "x2" is being removed.'
):
m2.reflect(connection, extend_existing=True)
eq_(set(t2.columns.keys()), {"x", "y", "id"})
elif extend_type.metadata_reflect_no_replace:
t2 = Table(
"t",
m2,
Column("id", Integer, primary_key=True),
Column("x", Integer, key="x2"),
)
m2.reflect(
connection, extend_existing=True, autoload_replace=False
)
eq_(set(t2.columns.keys()), {"x2", "y", "id"})
elif extend_type.autoload:
t2 = Table(
"t",
m2,
Column("id", Integer, primary_key=True),
Column("x", Integer, key="x2"),
autoload_with=connection,
extend_existing=True,
)
eq_(set(t2.columns.keys()), {"x2", "y", "id"})
elif extend_type.plain_table:
Table(
"t",
m2,
Column("id", Integer, primary_key=True),
Column("x", Integer, key="x2"),
)
with expect_warnings(
'Column with user-specified key "x2" is being replaced with '
'plain named column "x", key "x2" is being removed.'
):
t2 = Table(
"t",
m2,
Column("id", Integer, primary_key=True),
Column("x", Integer),
Column("y", Integer),
extend_existing=True,
)
eq_(set(t2.columns.keys()), {"x", "y", "id"})
def test_extend_existing_reflect_all_dont_dupe_index(
self, connection, metadata
):
m = metadata
d = Table(
"d",
m,
Column("id", Integer, primary_key=True),
Column("foo", String(50)),
Column("bar", String(50)),
UniqueConstraint("bar"),
)
Index("foo_idx", d.c.foo)
Table(
"b",
m,
Column("id", Integer, primary_key=True),
Column("aid", ForeignKey("d.id")),
)
m.create_all(connection)
m2 = MetaData()
m2.reflect(connection, extend_existing=True)
eq_(
len(
[
idx
for idx in m2.tables["d"].indexes
if idx.name == "foo_idx"
]
),
1,
)
if (
# fmt: off
testing.requires.
unique_constraint_reflection_no_index_overlap.enabled
# fmt: on
):
eq_(
len(
[
const
for const in m2.tables["d"].constraints
if isinstance(const, UniqueConstraint)
]
),
1,
)
def test_include_columns_indexes(self, connection, metadata):
m = metadata
t1 = Table("t1", m, Column("a", sa.Integer), Column("b", sa.Integer))
sa.Index("foobar", t1.c.a, t1.c.b)
sa.Index("bat", t1.c.a)
m.create_all(connection)
m2 = MetaData()
t2 = Table("t1", m2, autoload_with=connection)
assert len(t2.indexes) == 2
m2 = MetaData()
t2 = Table("t1", m2, autoload_with=connection, include_columns=["a"])
assert len(t2.indexes) == 1
m2 = MetaData()
t2 = Table(
"t1", m2, autoload_with=connection, include_columns=["a", "b"]
)
assert len(t2.indexes) == 2
def test_autoload_replace_foreign_key_nonpresent(
self, connection, metadata
):
"""test autoload_replace=False with col plus FK
establishes the FK not present in the DB.
"""
Table("a", metadata, Column("id", Integer, primary_key=True))
Table(
"b",
metadata,
Column("id", Integer, primary_key=True),
Column("a_id", Integer),
)
metadata.create_all(connection)
m2 = MetaData()
b2 = Table("b", m2, Column("a_id", Integer, sa.ForeignKey("a.id")))
a2 = Table("a", m2, autoload_with=connection)
b2 = Table(
"b",
m2,
extend_existing=True,
autoload_with=connection,
autoload_replace=False,
)
assert b2.c.id is not None
assert b2.c.a_id.references(a2.c.id)
eq_(len(b2.constraints), 2)
def test_autoload_replace_foreign_key_ispresent(
self, connection, metadata
):
"""test autoload_replace=False with col plus FK mirroring
DB-reflected FK skips the reflected FK and installs
the in-python one only.
"""
Table("a", metadata, Column("id", Integer, primary_key=True))
Table(
"b",
metadata,
Column("id", Integer, primary_key=True),
Column("a_id", Integer, sa.ForeignKey("a.id")),
)
metadata.create_all(connection)
m2 = MetaData()
b2 = Table("b", m2, Column("a_id", Integer, sa.ForeignKey("a.id")))
a2 = Table("a", m2, autoload_with=connection)
b2 = Table(
"b",
m2,
extend_existing=True,
autoload_with=connection,
autoload_replace=False,
)
assert b2.c.id is not None
assert b2.c.a_id.references(a2.c.id)
eq_(len(b2.constraints), 2)
def test_autoload_replace_foreign_key_removed(self, connection, metadata):
"""test autoload_replace=False with col minus FK that's in the
DB means the FK is skipped and doesn't get installed at all.
"""
Table("a", metadata, Column("id", Integer, primary_key=True))
Table(
"b",
metadata,
Column("id", Integer, primary_key=True),
Column("a_id", Integer, sa.ForeignKey("a.id")),
)
metadata.create_all(connection)
m2 = MetaData()
b2 = Table("b", m2, Column("a_id", Integer))
a2 = Table("a", m2, autoload_with=connection)
b2 = Table(
"b",
m2,
extend_existing=True,
autoload_with=connection,
autoload_replace=False,
)
assert b2.c.id is not None
assert not b2.c.a_id.references(a2.c.id)
eq_(len(b2.constraints), 1)
def test_autoload_replace_primary_key(self, connection, metadata):
Table("a", metadata, Column("id", Integer))
metadata.create_all(connection)
m2 = MetaData()
a2 = Table("a", m2, Column("id", Integer, primary_key=True))
Table(
"a",
m2,
autoload_with=connection,
autoload_replace=False,
extend_existing=True,
)
eq_(list(a2.primary_key), [a2.c.id])
def test_autoload_replace_arg(self):
Table("t", MetaData(), autoload_replace=False)
def test_autoincrement_col(self, connection, metadata):
"""test that 'autoincrement' is reflected according to sqla's policy.
Don't mark this test as unsupported for any backend !
"""
meta = metadata
Table(
"test",
meta,
Column("id", sa.Integer, primary_key=True),
Column("data", sa.String(50)),
mysql_engine="InnoDB",
)
Table(
"test2",
meta,
Column(
"id", sa.Integer, sa.ForeignKey("test.id"), primary_key=True
),
Column("id2", sa.Integer, primary_key=True),
Column("data", sa.String(50)),
mysql_engine="InnoDB",
)
meta.create_all(connection)
m2 = MetaData()
t1a = Table("test", m2, autoload_with=connection)
assert t1a._autoincrement_column is t1a.c.id
t2a = Table("test2", m2, autoload_with=connection)
assert t2a._autoincrement_column is None
@skip("sqlite")
def test_unknown_types(self, connection, metadata):
"""Test the handling of unknown types for the given dialect.
sqlite is skipped because it has special rules for unknown types using
'affinity types' - this feature is tested in that dialect's test spec.
"""
meta = metadata
t = Table("test", meta, Column("foo", sa.DateTime))
t.create(connection)
with mock.patch.object(connection.dialect, "ischema_names", {}):
m2 = MetaData()
with testing.expect_warnings("Did not recognize type"):
t3 = Table("test", m2, autoload_with=connection)
is_(t3.c.foo.type.__class__, sa.types.NullType)
def test_basic_override(self, connection, metadata):
meta = metadata
table = Table(
"override_test",
meta,
Column("col1", sa.Integer, primary_key=True),
Column("col2", sa.String(20)),
Column("col3", sa.Numeric),
)
table.create(connection)
meta2 = MetaData()
table = Table(
"override_test",
meta2,
Column("col2", sa.Unicode()),
Column("col4", sa.String(30)),
autoload_with=connection,
)
self.assert_(isinstance(table.c.col1.type, sa.Integer))
self.assert_(isinstance(table.c.col2.type, sa.Unicode))
self.assert_(isinstance(table.c.col4.type, sa.String))
def test_override_upgrade_pk_flag(self, connection, metadata):
meta = metadata
table = Table(
"override_test",
meta,
Column("col1", sa.Integer),
Column("col2", sa.String(20)),
Column("col3", sa.Numeric),
)
table.create(connection)
meta2 = MetaData()
table = Table(
"override_test",
meta2,
Column("col1", sa.Integer, primary_key=True),
autoload_with=connection,
)
eq_(list(table.primary_key), [table.c.col1])
eq_(table.c.col1.primary_key, True)
def test_override_pkfk(self, connection, metadata):
"""test that you can override columns which contain foreign keys
to other reflected tables, where the foreign key column is also
a primary key column"""
meta = metadata
Table(
"users",
meta,
Column("id", sa.Integer, primary_key=True),
Column("name", sa.String(30)),
)
Table(
"addresses",
meta,
Column("id", sa.Integer, primary_key=True),
Column("street", sa.String(30)),
)
meta.create_all(connection)
meta2 = MetaData()
a2 = Table(
"addresses",
meta2,
Column(
"id", sa.Integer, sa.ForeignKey("users.id"), primary_key=True
),
autoload_with=connection,
)
u2 = Table("users", meta2, autoload_with=connection)
assert list(a2.primary_key) == [a2.c.id]
assert list(u2.primary_key) == [u2.c.id]
assert u2.join(a2).onclause.compare(u2.c.id == a2.c.id)
meta3 = MetaData()
u3 = Table("users", meta3, autoload_with=connection)
a3 = Table(
"addresses",
meta3,
Column(
"id", sa.Integer, sa.ForeignKey("users.id"), primary_key=True
),
autoload_with=connection,
)
assert list(a3.primary_key) == [a3.c.id]
assert list(u3.primary_key) == [u3.c.id]
assert u3.join(a3).onclause.compare(u3.c.id == a3.c.id)
def test_override_nonexistent_fk(self, connection, metadata):
"""test that you can override columns and create new foreign
keys to other reflected tables which have no foreign keys. this
is common with MySQL MyISAM tables."""
meta = metadata
Table(
"users",
meta,
Column("id", sa.Integer, primary_key=True),
Column("name", sa.String(30)),
)
Table(
"addresses",
meta,
Column("id", sa.Integer, primary_key=True),
Column("street", sa.String(30)),
Column("user_id", sa.Integer),
)
meta.create_all(connection)
meta2 = MetaData()
a2 = Table(
"addresses",
meta2,
Column("user_id", sa.Integer, sa.ForeignKey("users.id")),
autoload_with=connection,
)
u2 = Table("users", meta2, autoload_with=connection)
assert len(a2.c.user_id.foreign_keys) == 1
assert len(a2.foreign_keys) == 1
assert [c.parent for c in a2.foreign_keys] == [a2.c.user_id]
assert [c.parent for c in a2.c.user_id.foreign_keys] == [a2.c.user_id]
assert list(a2.c.user_id.foreign_keys)[0].parent is a2.c.user_id
assert u2.join(a2).onclause.compare(u2.c.id == a2.c.user_id)
meta3 = MetaData()
u3 = Table("users", meta3, autoload_with=connection)
a3 = Table(
"addresses",
meta3,
Column("user_id", sa.Integer, sa.ForeignKey("users.id")),
autoload_with=connection,
)
assert u3.join(a3).onclause.compare(u3.c.id == a3.c.user_id)
meta4 = MetaData()
u4 = Table(
"users",
meta4,
Column("id", sa.Integer, key="u_id", primary_key=True),
autoload_with=connection,
)
a4 = Table(
"addresses",
meta4,
Column("id", sa.Integer, key="street", primary_key=True),
Column("street", sa.String(30), key="user_id"),
Column(
"user_id", sa.Integer, sa.ForeignKey("users.u_id"), key="id"
),
autoload_with=connection,
)
# for the thing happening here with the column collection,
# see test/base/test_utils.py-> test_replace_switch_key_name.
assert u4.join(a4).onclause.compare(u4.c.u_id == a4.c.id)
assert list(u4.primary_key) == [u4.c.u_id]
assert len(u4.columns) == 2
assert len(u4.constraints) == 1
assert len(a4.columns) == 3
assert len(a4.constraints) == 2
def test_override_composite_fk(self, connection, metadata):
"""Test double-remove of composite foreign key, when replaced."""
Table(
"a",
metadata,
Column("x", sa.Integer, primary_key=True),
Column("y", sa.Integer, primary_key=True),
)
Table(
"b",
metadata,
Column("x", sa.Integer, primary_key=True),
Column("y", sa.Integer, primary_key=True),
sa.ForeignKeyConstraint(["x", "y"], ["a.x", "a.y"]),
)
metadata.create_all(connection)
meta2 = MetaData()
c1 = Column("x", sa.Integer, primary_key=True)
c2 = Column("y", sa.Integer, primary_key=True)
f1 = sa.ForeignKeyConstraint(["x", "y"], ["a.x", "a.y"])
b1 = Table("b", meta2, c1, c2, f1, autoload_with=connection)
assert b1.c.x is c1
assert b1.c.y is c2
assert f1 in b1.constraints
assert len(b1.constraints) == 2
def test_override_keys(self, metadata, connection):
"""test that columns can be overridden with a 'key',
and that ForeignKey targeting during reflection still works."""
meta = metadata
Table(
"a",
meta,
Column("x", sa.Integer, primary_key=True),
Column("z", sa.Integer),
test_needs_fk=True,
)
Table(
"b",
meta,
Column("y", sa.Integer, sa.ForeignKey("a.x")),
test_needs_fk=True,
)
meta.create_all(connection)
m2 = MetaData()
a2 = Table(
"a",
m2,
Column("x", sa.Integer, primary_key=True, key="x1"),
autoload_with=connection,
)
b2 = Table("b", m2, autoload_with=connection)
assert a2.join(b2).onclause.compare(a2.c.x1 == b2.c.y)
assert b2.c.y.references(a2.c.x1)
def test_nonreflected_fk_raises(self, connection, metadata):
"""test that a NoReferencedColumnError is raised when reflecting
a table with an FK to another table which has not included the target
column in its reflection.
"""
meta = metadata
Table(
"a",
meta,
Column("x", sa.Integer, primary_key=True),
Column("z", sa.Integer),
test_needs_fk=True,
)
Table(
"b",
meta,
Column("y", sa.Integer, sa.ForeignKey("a.x")),
test_needs_fk=True,
)
meta.create_all(connection)
m2 = MetaData()
a2 = Table("a", m2, include_columns=["z"], autoload_with=connection)
b2 = Table("b", m2, autoload_with=connection)
assert_raises(sa.exc.NoReferencedColumnError, a2.join, b2)
def test_override_existing_fk(self, connection, metadata):
"""test that you can override columns and specify new foreign
keys to other reflected tables, on columns which *do* already
have that foreign key, and that the FK is not duped."""
meta = metadata
Table(
"users",
meta,
Column("id", sa.Integer, primary_key=True),
Column("name", sa.String(30)),
test_needs_fk=True,
)
Table(
"addresses",
meta,
Column("id", sa.Integer, primary_key=True),
Column("user_id", sa.Integer, sa.ForeignKey("users.id")),
test_needs_fk=True,
)
meta.create_all(connection)
meta2 = MetaData()
a2 = Table(
"addresses",
meta2,
Column("user_id", sa.Integer, sa.ForeignKey("users.id")),
autoload_with=connection,
)
u2 = Table("users", meta2, autoload_with=connection)
s = sa.select(a2).subquery()
assert s.c.user_id is not None
assert len(a2.foreign_keys) == 1
assert len(a2.c.user_id.foreign_keys) == 1
assert len(a2.constraints) == 2
assert [c.parent for c in a2.foreign_keys] == [a2.c.user_id]
assert [c.parent for c in a2.c.user_id.foreign_keys] == [a2.c.user_id]
assert list(a2.c.user_id.foreign_keys)[0].parent is a2.c.user_id
assert u2.join(a2).onclause.compare(u2.c.id == a2.c.user_id)
meta2 = MetaData()
u2 = Table(
"users",
meta2,
Column("id", sa.Integer, primary_key=True),
autoload_with=connection,
)
a2 = Table(
"addresses",
meta2,
Column("id", sa.Integer, primary_key=True),
Column("user_id", sa.Integer, sa.ForeignKey("users.id")),
autoload_with=connection,
)
s = sa.select(a2).subquery()
assert s.c.user_id is not None
assert len(a2.foreign_keys) == 1
assert len(a2.c.user_id.foreign_keys) == 1
assert len(a2.constraints) == 2
assert [c.parent for c in a2.foreign_keys] == [a2.c.user_id]
assert [c.parent for c in a2.c.user_id.foreign_keys] == [a2.c.user_id]
assert list(a2.c.user_id.foreign_keys)[0].parent is a2.c.user_id
assert u2.join(a2).onclause.compare(u2.c.id == a2.c.user_id)
@testing.only_on(["postgresql", "mysql"])
def test_fk_options(self, connection, metadata):
"""test that foreign key reflection includes options (on
backends with {dialect}.get_foreign_keys() support)"""
if testing.against("postgresql"):
test_attrs = (
"match",
"onupdate",
"ondelete",
"deferrable",
"initially",
)
addresses_user_id_fkey = sa.ForeignKey(
# Each option is specifically not a Postgres default, or
# it won't be returned by PG's inspection
"users.id",
name="addresses_user_id_fkey",
match="FULL",
onupdate="RESTRICT",
ondelete="RESTRICT",
deferrable=True,
initially="DEFERRED",
)
elif testing.against("mysql"):
# MATCH, DEFERRABLE, and INITIALLY cannot be defined for MySQL
# ON UPDATE and ON DELETE have defaults of RESTRICT, which are
# elided by MySQL's inspection
addresses_user_id_fkey = sa.ForeignKey(
"users.id",
name="addresses_user_id_fkey",
onupdate="CASCADE",
ondelete="CASCADE",
)
test_attrs = ("onupdate", "ondelete")
meta = metadata
Table(
"users",
meta,
Column("id", sa.Integer, primary_key=True),
Column("name", sa.String(30)),
test_needs_fk=True,
)
Table(
"addresses",
meta,
Column("id", sa.Integer, primary_key=True),
Column("user_id", sa.Integer, addresses_user_id_fkey),
test_needs_fk=True,
)
meta.create_all(connection)
meta2 = MetaData()
meta2.reflect(connection)
for fk in meta2.tables["addresses"].foreign_keys:
ref = addresses_user_id_fkey
for attr in test_attrs:
eq_(getattr(fk, attr), getattr(ref, attr))
def test_pks_not_uniques(self, connection, metadata):
"""test that primary key reflection not tripped up by unique
indexes"""
conn = connection
conn.exec_driver_sql(
"""
CREATE TABLE book (
id INTEGER NOT NULL,
title VARCHAR(100) NOT NULL,
series INTEGER,
series_id INTEGER,
UNIQUE(series, series_id),
PRIMARY KEY(id)
)"""
)
book = Table("book", metadata, autoload_with=connection)
assert book.primary_key.contains_column(book.c.id)
assert not book.primary_key.contains_column(book.c.series)
eq_(len(book.primary_key), 1)
def test_fk_error(self, connection, metadata):
Table(
"slots",
metadata,
Column("slot_id", sa.Integer, primary_key=True),
Column("pkg_id", sa.Integer, sa.ForeignKey("pkgs.pkg_id")),
Column("slot", sa.String(128)),
)
assert_raises_message(
sa.exc.InvalidRequestError,
"Foreign key associated with column 'slots.pkg_id' "
"could not find table 'pkgs' with which to generate "
"a foreign key to target column 'pkg_id'",
metadata.create_all,
connection,
)
def test_composite_pks(self, connection, metadata):
"""test reflection of a composite primary key"""
conn = connection
conn.exec_driver_sql(
"""
CREATE TABLE book (
id INTEGER NOT NULL,
isbn VARCHAR(50) NOT NULL,
title VARCHAR(100) NOT NULL,
series INTEGER NOT NULL,
series_id INTEGER NOT NULL,
UNIQUE(series, series_id),
PRIMARY KEY(id, isbn)
)"""
)
book = Table("book", metadata, autoload_with=connection)
assert book.primary_key.contains_column(book.c.id)
assert book.primary_key.contains_column(book.c.isbn)
assert not book.primary_key.contains_column(book.c.series)
eq_(len(book.primary_key), 2)
def test_composite_fk(self, connection, metadata):
"""test reflection of composite foreign keys"""
meta = metadata
multi = Table(
"multi",
meta,
Column("multi_id", sa.Integer, primary_key=True),
Column("multi_rev", sa.Integer, primary_key=True),
Column("multi_hoho", sa.Integer, primary_key=True),
Column("name", sa.String(50), nullable=False),
Column("val", sa.String(100)),
test_needs_fk=True,
)
multi2 = Table(
"multi2",
meta,
Column("id", sa.Integer, primary_key=True),
Column("foo", sa.Integer),
Column("bar", sa.Integer),
Column("lala", sa.Integer),
Column("data", sa.String(50)),
sa.ForeignKeyConstraint(
["foo", "bar", "lala"],
["multi.multi_id", "multi.multi_rev", "multi.multi_hoho"],
),
test_needs_fk=True,
)
meta.create_all(connection)
meta2 = MetaData()
table = Table("multi", meta2, autoload_with=connection)
table2 = Table("multi2", meta2, autoload_with=connection)
self.assert_tables_equal(multi, table)
self.assert_tables_equal(multi2, table2)
j = sa.join(table, table2)
self.assert_(
sa.and_(
table.c.multi_id == table2.c.foo,
table.c.multi_rev == table2.c.bar,
table.c.multi_hoho == table2.c.lala,
).compare(j.onclause)
)
@testing.crashes("oracle", "FIXME: unknown, confirm not fails_on")
@testing.requires.check_constraints
def test_reserved(self, connection, metadata):
# check a table that uses a SQL reserved name doesn't cause an
# error
meta = metadata
table_a = Table(
"select",
meta,
Column("not", sa.Integer, primary_key=True),
Column("from", sa.String(12), nullable=False),
sa.UniqueConstraint("from", name="when"),
)
sa.Index("where", table_a.c["from"])
if connection.dialect.requires_name_normalize:
check_col = "TRUE"
else:
check_col = "true"
quoter = connection.dialect.identifier_preparer.quote_identifier
Table(
"false",
meta,
Column("create", sa.Integer, primary_key=True),
Column("true", sa.Integer, sa.ForeignKey("select.not")),
sa.CheckConstraint("%s <> 1" % quoter(check_col), name="limit"),
)
table_c = Table(
"is",
meta,
Column("or", sa.Integer, nullable=False, primary_key=True),
Column("join", sa.Integer, nullable=False, primary_key=True),
sa.PrimaryKeyConstraint("or", "join", name="to"),
)
index_c = sa.Index("else", table_c.c.join)
meta.create_all(connection)
index_c.drop(connection)
meta2 = MetaData()
Table("select", meta2, autoload_with=connection)
Table("false", meta2, autoload_with=connection)
Table("is", meta2, autoload_with=connection)
def test_reflect_all(self, connection, metadata):
names = ["rt_%s" % name for name in ("a", "b", "c", "d", "e")]
nameset = set(names)
baseline = metadata
for name in names:
Table(name, baseline, Column("id", sa.Integer, primary_key=True))
baseline.create_all(connection)
m1 = MetaData()
is_false(m1.tables)
m1.reflect(connection)
is_true(nameset.issubset(set(m1.tables.keys())))
m2 = MetaData()
m2.reflect(connection, only=["rt_a", "rt_b"])
eq_(set(m2.tables.keys()), {"rt_a", "rt_b"})
m3 = MetaData()
m3.reflect(connection, only=lambda name, meta: name == "rt_c")
eq_(set(m3.tables.keys()), {"rt_c"})
m4 = MetaData()
assert_raises_message(
sa.exc.InvalidRequestError,
r"Could not reflect: requested table\(s\) not available in "
r"Engine\(.*?\): \(rt_f\)",
m4.reflect,
connection,
only=["rt_a", "rt_f"],
)
m5 = MetaData()
m5.reflect(connection, only=[])
is_false(m5.tables)
m6 = MetaData()
m6.reflect(connection, only=lambda n, m: False)
is_false(m6.tables)
m7 = MetaData()
m7.reflect(connection)
is_true(nameset.issubset(set(m7.tables.keys())))
m8_e1 = MetaData()
rt_c = Table("rt_c", m8_e1)
m8_e1.reflect(connection, extend_existing=True)
eq_(set(m8_e1.tables.keys()), set(names))
eq_(rt_c.c.keys(), ["id"])
m8_e2 = MetaData()
rt_c = Table("rt_c", m8_e2)
m8_e2.reflect(connection, extend_existing=True, only=["rt_a", "rt_c"])
eq_(set(m8_e2.tables.keys()), {"rt_a", "rt_c"})
eq_(rt_c.c.keys(), ["id"])
baseline.drop_all(connection)
m9 = MetaData()
m9.reflect(connection)
is_false(m9.tables)
def test_reflect_all_unreflectable_table(self, connection, metadata):
names = ["rt_%s" % name for name in ("a", "b", "c", "d", "e")]
for name in names:
Table(name, metadata, Column("id", sa.Integer, primary_key=True))
metadata.create_all(connection)
m = MetaData()
inspector = sa.engine.reflection.Inspector
reflect_table = inspector.reflect_table
def patched(self, table, *arg, **kw):
if table.name == "rt_c":
raise sa.exc.UnreflectableTableError("Can't reflect rt_c")
else:
return reflect_table(self, table, *arg, **kw)
with mock.patch.object(inspector, "reflect_table", patched):
with expect_warnings("Skipping table rt_c: Can't reflect rt_c"):
m.reflect(connection)
assert_raises_message(
sa.exc.UnreflectableTableError,
"Can't reflect rt_c",
Table,
"rt_c",
m,
autoload_with=connection,
)
def test_index_reflection(self, connection, metadata):
m1 = metadata
t1 = Table(
"party",
m1,
Column("id", sa.Integer, nullable=False),
Column("name", sa.String(20), index=True),
)
sa.Index("idx1", t1.c.id, unique=True)
sa.Index("idx2", t1.c.name, t1.c.id, unique=False)
m1.create_all(connection)
m2 = MetaData()
t2 = Table("party", m2, autoload_with=connection)
assert len(t2.indexes) == 3
# Make sure indexes are in the order we expect them in
tmp = [(idx.name, idx) for idx in t2.indexes]
tmp.sort()
r1, r2, r3 = (idx[1] for idx in tmp)
assert r1.name == "idx1"
assert r2.name == "idx2"
assert r1.unique == True # noqa
assert r2.unique == False # noqa
assert r3.unique == False # noqa
assert {t2.c.id} == set(r1.columns)
assert {t2.c.name, t2.c.id} == set(r2.columns)
assert {t2.c.name} == set(r3.columns)
@testing.requires.comment_reflection
def test_comment_reflection(self, connection, metadata):
m1 = metadata
Table(
"sometable",
m1,
Column("id", sa.Integer, comment="c1 comment"),
comment="t1 comment",
)
m1.create_all(connection)
m2 = MetaData()
t2 = Table("sometable", m2, autoload_with=connection)
eq_(t2.comment, "t1 comment")
eq_(t2.c.id.comment, "c1 comment")
t3 = Table("sometable", m2, extend_existing=True)
eq_(t3.comment, "t1 comment")
eq_(t3.c.id.comment, "c1 comment")
@testing.requires.check_constraint_reflection
def test_check_constraint_reflection(self, connection, metadata):
m1 = metadata
Table(
"x",
m1,
Column("q", Integer),
sa.CheckConstraint("q > 10", name="ck1"),
)
m1.create_all(connection)
m2 = MetaData()
t2 = Table("x", m2, autoload_with=connection)
cks = [
const
for const in t2.constraints
if isinstance(const, sa.CheckConstraint)
]
eq_(len(cks), 1)
ck = cks[0]
eq_regex(ck.sqltext.text, r"[\(`]*q[\)`]* > 10")
eq_(ck.name, "ck1")
def test_index_reflection_cols_busted(self, connection, metadata):
t = Table("x", metadata, Column("a", Integer), Column("b", Integer))
sa.Index("x_ix", t.c.a, t.c.b)
metadata.create_all(connection)
gri = Inspector._get_reflection_info
def mock_gri(self, *a, **kw):
res = gri(self, *a, **kw)
res.columns[(None, "x")] = [
col for col in res.columns[(None, "x")] if col["name"] == "b"
]
return res
with testing.mock.patch.object(
Inspector, "_get_reflection_info", mock_gri
):
m = MetaData()
with testing.expect_warnings(
"index key 'a' was not located in columns"
):
t = Table("x", m, autoload_with=connection)
eq_(list(t.indexes)[0].columns, [t.c.b])
def test_index_reflection_expression_not_found(self, connection, metadata):
t = Table("x", metadata, Column("a", Integer), Column("b", Integer))
sa.Index("x_ix", t.c.a)
sa.Index("x_iy", t.c.a, t.c.b)
metadata.create_all(connection)
gri = Inspector._get_reflection_info
def mock_gri(self, *a, **kw):
res = gri(self, *a, **kw)
for idx in res.indexes[(None, "x")]:
if idx["name"] == "x_iy":
idx["column_names"][1] = None
idx.pop("expressions", None)
return res
with testing.mock.patch.object(
Inspector, "_get_reflection_info", mock_gri
):
m = MetaData()
with testing.expect_warnings(
"Skipping index 'x_iy' because key 2 reflected as None"
):
t = Table("x", m, autoload_with=connection)
eq_(len(t.indexes), 1)
eq_(list(t.indexes)[0].name, "x_ix")
@testing.requires.views
def test_views(self, connection, metadata):
users, addresses, dingalings = createTables(metadata)
try:
metadata.create_all(connection)
_create_views(connection, None)
m2 = MetaData()
users_v = Table("users_v", m2, autoload_with=connection)
addresses_v = Table(
"email_addresses_v", m2, autoload_with=connection
)
for c1, c2 in zip(users_v.c, users.c):
eq_(c1.name, c2.name)
self.assert_types_base(c1, c2)
for c1, c2 in zip(addresses_v.c, addresses.c):
eq_(c1.name, c2.name)
self.assert_types_base(c1, c2)
finally:
_drop_views(connection)
@testing.requires.views
def test_reflect_all_with_views(self, connection, metadata):
users, addresses, dingalings = createTables(metadata, None)
try:
metadata.create_all(connection)
_create_views(connection, None)
m2 = MetaData()
m2.reflect(connection, views=False)
eq_(set(m2.tables), {"users", "email_addresses", "dingalings"})
m2 = MetaData()
m2.reflect(connection, views=True)
eq_(
set(m2.tables),
{
"email_addresses_v",
"users_v",
"users",
"dingalings",
"email_addresses",
},
)
finally:
_drop_views(connection)
class CreateDropTest(fixtures.TablesTest):
__sparse_driver_backend__ = True
run_create_tables = None
@classmethod
def teardown_test_class(cls):
# TablesTest is used here without
# run_create_tables, so add an explicit drop of whatever is in
# metadata
cls._tables_metadata.drop_all(testing.db)
@classmethod
def define_tables(cls, metadata):
Table(
"users",
metadata,
Column(
"user_id",
sa.Integer,
normalize_sequence(
config, sa.Sequence("user_id_seq", optional=True)
),
primary_key=True,
),
Column("user_name", sa.String(40)),
)
Table(
"email_addresses",
metadata,
Column(
"address_id",
sa.Integer,
normalize_sequence(
config, sa.Sequence("address_id_seq", optional=True)
),
primary_key=True,
),
Column("user_id", sa.Integer, sa.ForeignKey("users.user_id")),
Column("email_address", sa.String(40)),
)
Table(
"orders",
metadata,
Column(
"order_id",
sa.Integer,
normalize_sequence(
config, sa.Sequence("order_id_seq", optional=True)
),
primary_key=True,
),
Column("user_id", sa.Integer, sa.ForeignKey("users.user_id")),
Column("description", sa.String(50)),
Column("isopen", sa.Integer),
)
Table(
"items",
metadata,
Column(
"item_id",
sa.INT,
normalize_sequence(
config, sa.Sequence("items_id_seq", optional=True)
),
primary_key=True,
),
Column("order_id", sa.INT, sa.ForeignKey("orders")),
Column("item_name", sa.VARCHAR(50)),
)
def test_sorter(self):
tables = self.tables_test_metadata.sorted_tables
table_names = [t.name for t in tables]
ua = [n for n in table_names if n in ("users", "email_addresses")]
oi = [n for n in table_names if n in ("orders", "items")]
eq_(ua, ["users", "email_addresses"])
eq_(oi, ["orders", "items"])
def test_checkfirst(self, connection: Connection) -> None:
insp = inspect(connection)
users = self.tables.users
is_false(insp.has_table("users"))
users.create(connection)
insp.clear_cache()
is_true(insp.has_table("users"))
users.create(connection, checkfirst=True)
users.drop(connection)
users.drop(connection, checkfirst=True)
insp.clear_cache()
is_false(insp.has_table("users"))
users.create(connection, checkfirst=True)
users.drop(connection)
def test_createdrop(self, connection: Connection) -> None:
insp = inspect(connection)
metadata = self.tables_test_metadata
assert metadata is not None
metadata.create_all(connection)
is_true(insp.has_table("items"))
is_true(insp.has_table("email_addresses"))
metadata.create_all(connection)
insp.clear_cache()
is_true(insp.has_table("items"))
metadata.drop_all(connection)
insp.clear_cache()
is_false(insp.has_table("items"))
is_false(insp.has_table("email_addresses"))
metadata.drop_all(connection)
insp.clear_cache()
is_false(insp.has_table("items"))
def test_has_table_and_table_names(self, connection):
"""establish that has_table and get_table_names are consistent w/
each other with regard to caching
"""
metadata = self.tables_test_metadata
metadata.create_all(bind=connection)
insp = inspect(connection)
# ensure all tables we created are in the list.
is_true(set(insp.get_table_names()).issuperset(metadata.tables))
assert insp.has_table("items")
assert "items" in insp.get_table_names()
self.tables.items.drop(connection)
# cached
assert insp.has_table("items")
assert "items" in insp.get_table_names()
insp = inspect(connection)
assert not insp.has_table("items")
assert "items" not in insp.get_table_names()
class SchemaManipulationTest(fixtures.TestBase):
__sparse_driver_backend__ = True
def test_append_constraint_unique(self):
meta = MetaData()
users = Table("users", meta, Column("id", sa.Integer))
addresses = Table(
"addresses",
meta,
Column("id", sa.Integer),
Column("user_id", sa.Integer),
)
fk = sa.ForeignKeyConstraint(["user_id"], [users.c.id])
addresses.append_constraint(fk)
addresses.append_constraint(fk)
assert len(addresses.c.user_id.foreign_keys) == 1
assert addresses.constraints == {addresses.primary_key, fk}
class UnicodeReflectionTest(fixtures.TablesTest):
__sparse_driver_backend__ = True
@classmethod
def define_tables(cls, metadata):
no_multibyte_period = {("plain", "col_plain", "ix_plain")}
no_has_table = [
(
"no_has_table_1",
"col_Unit\u00e9ble",
"ix_Unit\u00e9ble",
),
("no_has_table_2", "col_\u6e2c\u8a66", "ix_\u6e2c\u8a66"),
]
no_case_sensitivity = [
(
"\u6e2c\u8a66",
"col_\u6e2c\u8a66",
"ix_\u6e2c\u8a66",
),
(
"unit\u00e9ble",
"col_unit\u00e9ble",
"ix_unit\u00e9ble",
),
]
full = [
(
"Unit\u00e9ble",
"col_Unit\u00e9ble",
"ix_Unit\u00e9ble",
),
(
"\u6e2c\u8a66",
"col_\u6e2c\u8a66",
"ix_\u6e2c\u8a66",
),
]
# as you can see, our options for this kind of thing
# are really limited unless you're on PG or SQLite
# forget about it on these backends
if not testing.requires.unicode_ddl.enabled:
names = no_multibyte_period
# mysql can't handle casing usually
elif (
testing.against("mysql")
and not testing.requires.mysql_fully_case_sensitive.enabled
):
names = no_multibyte_period.union(no_case_sensitivity)
# mssql + pyodbc + freetds can't compare multibyte names to
# information_schema.tables.table_name
elif testing.against("mssql"):
names = no_multibyte_period.union(no_has_table)
else:
names = no_multibyte_period.union(full)
for tname, cname, ixname in names:
t = Table(
tname,
metadata,
Column(
"id",
sa.Integer,
normalize_sequence(config, sa.Sequence(cname + "_id_seq")),
primary_key=True,
),
Column(cname, Integer),
)
schema.Index(ixname, t.c[cname])
cls.names = names
@testing.requires.unicode_connections
def test_has_table(self, connection):
insp = inspect(connection)
for tname, cname, ixname in self.names:
assert insp.has_table(tname), "Can't detect name %s" % tname
@testing.requires.unicode_connections
def test_basic(self, connection):
# the 'convert_unicode' should not get in the way of the
# reflection process. reflect_table for oracle, postgresql
# (others?) expect non-unicode strings in result sets/bind
# params
names = {rec[0] for rec in self.names}
reflected = set(inspect(connection).get_table_names())
if not names.issubset(reflected) and hasattr(unicodedata, "normalize"):
# Python source files in the utf-8 coding seem to
# normalize literals as NFC (and the above are
# explicitly NFC). Maybe this database normalizes NFD
# on reflection.
nfc = {unicodedata.normalize("NFC", n) for n in names}
self.assert_(nfc == names)
# Yep. But still ensure that bulk reflection and
# create/drop work with either normalization.
r = MetaData()
r.reflect(connection)
r.drop_all(connection, checkfirst=False)
r.create_all(connection, checkfirst=False)
@testing.requires.unicode_connections
def test_get_names(self, connection):
inspector = inspect(connection)
names = {tname: (cname, ixname) for tname, cname, ixname in self.names}
for tname in inspector.get_table_names():
assert tname in names
eq_(
[
(rec["name"], rec["column_names"][0])
for rec in inspector.get_indexes(tname)
],
[(names[tname][1], names[tname][0])],
)
class SchemaTest(fixtures.TestBase):
__sparse_driver_backend__ = True
@testing.requires.schemas
def test_has_schema(self):
with testing.db.connect() as conn:
eq_(
testing.db.dialect.has_schema(
conn, testing.config.test_schema
),
True,
)
eq_(
testing.db.dialect.has_schema(conn, "sa_fake_schema_123"),
False,
)
@testing.requires.schemas
@testing.requires.cross_schema_fk_reflection
@testing.requires.implicit_default_schema
def test_blank_schema_arg(self, connection, metadata):
Table(
"some_table",
metadata,
Column("id", Integer, primary_key=True),
Column("sid", Integer, sa.ForeignKey("some_other_table.id")),
schema=testing.config.test_schema,
test_needs_fk=True,
)
Table(
"some_other_table",
metadata,
Column("id", Integer, primary_key=True),
schema=None,
test_needs_fk=True,
)
metadata.create_all(connection)
meta2 = MetaData(schema=testing.config.test_schema)
meta2.reflect(connection)
eq_(
set(meta2.tables),
{
"some_other_table",
"%s.some_table" % testing.config.test_schema,
},
)
@testing.requires.schemas
def test_explicit_default_schema(self, connection, metadata):
schema = connection.dialect.default_schema_name
assert bool(schema)
Table(
"table1",
metadata,
Column("col1", sa.Integer, primary_key=True),
test_needs_fk=True,
schema=schema,
)
Table(
"table2",
metadata,
Column("col1", sa.Integer, primary_key=True),
Column(
"col2", sa.Integer, sa.ForeignKey("%s.table1.col1" % schema)
),
test_needs_fk=True,
schema=schema,
)
metadata.create_all(connection)
metadata.create_all(connection, checkfirst=True)
eq_(len(metadata.tables), 2)
m1 = MetaData()
Table("table1", m1, autoload_with=connection, schema=schema)
Table("table2", m1, autoload_with=connection, schema=schema)
eq_(len(m1.tables), 2)
@testing.requires.schemas
def test_schema_translation(self, connection, metadata):
Table(
"foob",
metadata,
Column("q", Integer),
schema=config.test_schema,
)
metadata.create_all(connection)
m = MetaData()
map_ = {"foob": config.test_schema}
c2 = connection.execution_options(schema_translate_map=map_)
t = Table("foob", m, schema="foob", autoload_with=c2)
eq_(t.schema, "foob")
eq_(t.c.keys(), ["q"])
@testing.requires.schemas
def test_explicit_default_schema_metadata(self, connection, metadata):
schema = connection.dialect.default_schema_name
is_true(schema)
metadata.schema = schema
Table(
"table1",
metadata,
Column("col1", sa.Integer, primary_key=True),
test_needs_fk=True,
)
Table(
"table2",
metadata,
Column("col1", sa.Integer, primary_key=True),
Column("col2", sa.Integer, sa.ForeignKey("table1.col1")),
test_needs_fk=True,
)
metadata.create_all(connection)
metadata.create_all(connection, checkfirst=True)
m1 = MetaData(schema=schema)
Table("table1", m1, autoload_with=connection)
Table("table2", m1, autoload_with=connection)
eq_(len(m1.tables), 2)
@testing.requires.schemas
def test_metadata_reflect_schema(self, connection, metadata):
createTables(metadata, testing.config.test_schema)
metadata.create_all(connection)
m2 = MetaData(schema=testing.config.test_schema)
m2.reflect(connection)
eq_(
set(m2.tables),
{
"%s.dingalings" % testing.config.test_schema,
"%s.users" % testing.config.test_schema,
"%s.email_addresses" % testing.config.test_schema,
},
)
@testing.requires.schemas
@testing.requires.cross_schema_fk_reflection
@testing.requires.implicit_default_schema
def test_reflect_all_schemas_default_overlap(self, connection, metadata):
Table("t", metadata, Column("id", Integer, primary_key=True))
Table(
"t",
metadata,
Column("id1", sa.ForeignKey("t.id")),
schema=testing.config.test_schema,
)
metadata.create_all(connection)
m2 = MetaData()
m2.reflect(connection, schema=testing.config.test_schema)
m3 = MetaData()
m3.reflect(connection)
m3.reflect(connection, schema=testing.config.test_schema)
eq_(
{(t.name, t.schema) for t in m2.tables.values()},
{(t.name, t.schema) for t in m3.tables.values()},
)
# Tests related to engine.reflection
def createTables(meta, schema=None):
if schema:
schema_prefix = schema + "."
else:
schema_prefix = ""
users = Table(
"users",
meta,
Column("user_id", sa.INT, primary_key=True),
Column("user_name", sa.VARCHAR(20), nullable=False),
Column("test1", sa.CHAR(5), nullable=False),
Column("test2", sa.Float(), nullable=False),
Column("test3", sa.Text),
Column("test4", sa.Numeric(10, 2), nullable=False),
Column("test5", sa.Date),
Column(
"parent_user_id",
sa.Integer,
sa.ForeignKey("%susers.user_id" % schema_prefix),
),
Column("test6", sa.Date, nullable=False),
Column("test7", sa.Text),
Column("test8", sa.LargeBinary),
Column("test_passivedefault2", sa.Integer, server_default="5"),
Column("test9", sa.LargeBinary(100)),
Column("test10", sa.Numeric(10, 2)),
schema=schema,
test_needs_fk=True,
)
dingalings = Table(
"dingalings",
meta,
Column("dingaling_id", sa.Integer, primary_key=True),
Column(
"address_id",
sa.Integer,
sa.ForeignKey("%semail_addresses.address_id" % schema_prefix),
),
Column("data", sa.String(30)),
schema=schema,
test_needs_fk=True,
)
addresses = Table(
"email_addresses",
meta,
Column("address_id", sa.Integer),
Column("remote_user_id", sa.Integer, sa.ForeignKey(users.c.user_id)),
Column("email_address", sa.String(20)),
sa.PrimaryKeyConstraint("address_id", name="email_ad_pk"),
schema=schema,
test_needs_fk=True,
)
return (users, addresses, dingalings)
def createIndexes(con, schema=None):
fullname = "users"
if schema:
fullname = "%s.%s" % (schema, "users")
query = "CREATE INDEX users_t_idx ON %s (test1, test2)" % fullname
con.execute(sa.sql.text(query))
@testing.requires.views
def _create_views(conn, schema=None):
for table_name in ("users", "email_addresses"):
fullname = table_name
if schema:
fullname = "%s.%s" % (schema, table_name)
view_name = fullname + "_v"
query = "CREATE VIEW %s AS SELECT * FROM %s" % (
view_name,
fullname,
)
conn.execute(sa.sql.text(query))
@testing.requires.views
def _drop_views(conn, schema=None):
for table_name in ("email_addresses", "users"):
fullname = table_name
if schema:
fullname = "%s.%s" % (schema, table_name)
view_name = fullname + "_v"
query = "DROP VIEW %s" % view_name
conn.execute(sa.sql.text(query))
class ReverseCasingReflectTest(fixtures.TestBase, AssertsCompiledSQL):
__dialect__ = "default"
__sparse_driver_backend__ = True
@testing.requires.denormalized_names
def setup_test(self):
with testing.db.begin() as conn:
conn.exec_driver_sql(
"""
CREATE TABLE weird_casing(
col1 char(20),
"Col2" char(20),
"col3" char(20)
)
"""
)
@testing.requires.denormalized_names
def teardown_test(self):
with testing.db.begin() as conn:
conn.exec_driver_sql("drop table weird_casing")
@testing.requires.denormalized_names
def test_direct_quoting(self, connection):
m = MetaData()
t = Table("weird_casing", m, autoload_with=connection)
self.assert_compile(
t.select(),
"SELECT weird_casing.col1, "
'weird_casing."Col2", weird_casing."col3" '
"FROM weird_casing",
)
class CaseSensitiveTest(fixtures.TablesTest):
"""Nail down case sensitive behaviors, mostly on MySQL."""
__sparse_driver_backend__ = True
@classmethod
def define_tables(cls, metadata):
Table(
"SomeTable",
metadata,
Column("x", Integer, primary_key=True),
test_needs_fk=True,
)
Table(
"SomeOtherTable",
metadata,
Column("x", Integer, primary_key=True),
Column("y", Integer, sa.ForeignKey("SomeTable.x")),
test_needs_fk=True,
)
@testing.fails_if(testing.requires._has_mysql_on_windows)
def test_table_names(self, connection):
x = inspect(connection).get_table_names()
assert {"SomeTable", "SomeOtherTable"}.issubset(x)
def test_reflect_exact_name(self, connection):
m = MetaData()
t1 = Table("SomeTable", m, autoload_with=connection)
eq_(t1.name, "SomeTable")
assert t1.c.x is not None
@testing.fails_if(
lambda: testing.against(("mysql", "<", (5, 5)))
and not testing.requires._has_mysql_fully_case_sensitive()
)
def test_reflect_via_fk(self, connection):
m = MetaData()
t2 = Table("SomeOtherTable", m, autoload_with=connection)
eq_(t2.name, "SomeOtherTable")
assert "SomeTable" in m.tables
@testing.fails_if(testing.requires._has_mysql_fully_case_sensitive)
@testing.fails_on_everything_except("sqlite", "mysql", "mssql")
def test_reflect_case_insensitive(self, connection):
m = MetaData()
t2 = Table("sOmEtAbLe", m, autoload_with=connection)
eq_(t2.name, "sOmEtAbLe")
class ColumnEventsTest(fixtures.RemovesEvents, fixtures.TablesTest):
__sparse_driver_backend__ = True
@classmethod
def define_tables(cls, metadata):
to_reflect = Table(
"to_reflect",
metadata,
Column("x", sa.Integer, primary_key=True, autoincrement=False),
Column("y", sa.Integer),
test_needs_fk=True,
)
Table(
"related",
metadata,
Column("q", sa.Integer, sa.ForeignKey("to_reflect.x")),
test_needs_fk=True,
)
sa.Index("some_index", to_reflect.c.y)
def _do_test(
self, connection, col, update, assert_, tablename="to_reflect"
):
# load the actual Table class, not the test
# wrapper
from sqlalchemy.schema import Table
m = MetaData()
def column_reflect(insp, table, column_info):
if column_info["name"] == col:
column_info.update(update)
t = Table(
tablename,
m,
autoload_with=connection,
listeners=[("column_reflect", column_reflect)],
)
assert_(t)
m = MetaData()
self.event_listen(Table, "column_reflect", column_reflect)
t2 = Table(tablename, m, autoload_with=connection)
assert_(t2)
def test_override_key(self, connection):
def assertions(table):
eq_(table.c.YXZ.name, "x")
eq_(set(table.primary_key), {table.c.YXZ})
self._do_test(connection, "x", {"key": "YXZ"}, assertions)
def test_override_index(self, connection):
def assertions(table):
idx = list(table.indexes)[0]
eq_(idx.columns, [table.c.YXZ])
self._do_test(connection, "y", {"key": "YXZ"}, assertions)
def test_override_key_fk(self, connection):
m = MetaData()
def column_reflect(insp, table, column_info):
if column_info["name"] == "q":
column_info["key"] = "qyz"
elif column_info["name"] == "x":
column_info["key"] = "xyz"
to_reflect = Table(
"to_reflect",
m,
autoload_with=connection,
listeners=[("column_reflect", column_reflect)],
)
related = Table(
"related",
m,
autoload_with=connection,
listeners=[("column_reflect", column_reflect)],
)
assert related.c.qyz.references(to_reflect.c.xyz)
def test_override_type(self, connection):
def assert_(table):
assert isinstance(table.c.x.type, sa.String)
self._do_test(connection, "x", {"type": sa.String}, assert_)
def test_override_info(self, connection):
self._do_test(
connection,
"x",
{"info": {"a": "b"}},
lambda table: eq_(table.c.x.info, {"a": "b"}),
)
def test_override_server_default_fetchedvalue(self, connection):
my_default = FetchedValue()
self._do_test(
connection,
"x",
{"default": my_default},
lambda table: eq_(table.c.x.server_default, my_default),
)
def test_override_server_default_default_clause(self, connection):
my_default = DefaultClause("1")
self._do_test(
connection,
"x",
{"default": my_default},
lambda table: eq_(table.c.x.server_default, my_default),
)
def test_override_server_default_plain_text(self, connection):
my_default = "1"
def assert_text_of_one(table):
is_true(
isinstance(
table.c.x.server_default.arg, sql.elements.TextClause
)
)
eq_(str(table.c.x.server_default.arg), "1")
self._do_test(
connection, "x", {"default": my_default}, assert_text_of_one
)
def test_override_server_default_textclause(self, connection):
my_default = sa.text("1")
def assert_text_of_one(table):
is_true(
isinstance(
table.c.x.server_default.arg, sql.elements.TextClause
)
)
eq_(str(table.c.x.server_default.arg), "1")
self._do_test(
connection, "x", {"default": my_default}, assert_text_of_one
)
def test_listen_metadata_obj(self, connection):
m1 = MetaData()
m2 = MetaData()
canary = []
@event.listens_for(m1, "column_reflect")
def go(insp, table, info):
canary.append(info["name"])
Table("related", m1, autoload_with=connection)
Table("related", m2, autoload_with=connection)
eq_(canary, ["q", "x", "y"])
def test_listen_metadata_cls(self, connection):
m1 = MetaData()
m2 = MetaData()
canary = []
def go(insp, table, info):
canary.append(info["name"])
self.event_listen(MetaData, "column_reflect", go)
Table("related", m1, autoload_with=connection)
Table("related", m2, autoload_with=connection)
eq_(canary, ["q", "x", "y", "q", "x", "y"])
class ComputedColumnTest(fixtures.ComputedReflectionFixtureTest):
def check_table_column(self, table, name, text, persisted):
is_true(name in table.columns)
col = table.columns[name]
is_not(col.computed, None)
is_instance_of(col.computed, Computed)
eq_(self.normalize(str(col.computed.sqltext)), text)
if testing.requires.computed_columns_reflect_persisted.enabled:
eq_(col.computed.persisted, persisted)
else:
is_(col.computed.persisted, None)
def test_table_reflection(self):
meta = MetaData()
table = Table("computed_column_table", meta, autoload_with=config.db)
self.check_table_column(
table,
"computed_no_flag",
"normal+42",
testing.requires.computed_columns_default_persisted.enabled,
)
if testing.requires.computed_columns_virtual.enabled:
self.check_table_column(
table,
"computed_virtual",
"normal+2",
False,
)
if testing.requires.computed_columns_stored.enabled:
self.check_table_column(
table,
"computed_stored",
"normal-42",
True,
)
class IdentityColumnTest(fixtures.TablesTest):
run_inserts = run_deletes = None
__sparse_driver_backend__ = True
__requires__ = ("identity_columns", "table_reflection")
@classmethod
def define_tables(cls, metadata):
Table(
"t1",
metadata,
Column("normal", Integer),
Column("id1", Integer, Identity(start=2, increment=3)),
)
def test_table_reflection(self):
meta = MetaData()
table = Table("t1", meta, autoload_with=config.db)
eq_(table.c.normal.identity, None)
is_true(table.c.id1.identity is not None)
eq_(table.c.id1.identity.start, 2)
eq_(table.c.id1.identity.increment, 3)
class IncludeColsFksTest(AssertsCompiledSQL, fixtures.TestBase):
__dialect__ = "default"
@testing.fixture
def tab_wo_fks(self, connection, metadata):
meta = metadata
foo = Table(
"foo",
meta,
*[
Column(n, sa.String(30))
for n in ["a", "b", "c", "d", "e", "f"]
],
)
meta.create_all(connection)
return foo
@testing.fixture
def tab_w_fks(self, connection, metadata):
Table(
"a",
metadata,
Column("x", Integer, primary_key=True),
test_needs_fk=True,
)
b = Table(
"b",
metadata,
Column("x", Integer, primary_key=True),
Column("q", Integer),
Column("p", Integer),
Column("r", Integer, ForeignKey("a.x")),
Column("s", Integer),
Column("t", Integer),
test_needs_fk=True,
)
metadata.create_all(connection)
return b
def test_include_columns(self, connection, tab_wo_fks):
foo = tab_wo_fks
meta2 = MetaData()
foo = Table(
"foo",
meta2,
autoload_with=connection,
include_columns=["b", "f", "e"],
)
# test that cols come back in original order
eq_([c.name for c in foo.c], ["b", "e", "f"])
for c in ("b", "f", "e"):
assert c in foo.c
for c in ("a", "c", "d"):
assert c not in foo.c
# test against a table which is already reflected
meta3 = MetaData()
foo = Table("foo", meta3, autoload_with=connection)
foo = Table(
"foo", meta3, include_columns=["b", "f", "e"], extend_existing=True
)
eq_([c.name for c in foo.c], ["b", "e", "f"])
for c in ("b", "f", "e"):
assert c in foo.c
for c in ("a", "c", "d"):
assert c not in foo.c
@testing.combinations(True, False, argnames="resolve_fks")
def test_include_cols_skip_fk_col(
self, connection, tab_w_fks, resolve_fks
):
"""test #8100"""
m2 = MetaData()
b2 = Table(
"b",
m2,
autoload_with=connection,
resolve_fks=resolve_fks,
include_columns=["x", "q", "p"],
)
eq_([c.name for c in b2.c], ["x", "q", "p"])
# no FK, whether or not resolve_fks was called
eq_(b2.constraints, {b2.primary_key})
b2a = b2.alias()
eq_([c.name for c in b2a.c], ["x", "q", "p"])
self.assert_compile(select(b2), "SELECT b.x, b.q, b.p FROM b")
self.assert_compile(
select(b2.alias()),
"SELECT b_1.x, b_1.q, b_1.p FROM b AS b_1",
)
def test_table_works_minus_fks(self, connection, tab_w_fks):
"""test #8101"""
m2 = MetaData()
b2 = Table(
"b",
m2,
autoload_with=connection,
resolve_fks=False,
)
eq_([c.name for c in b2.c], ["x", "q", "p", "r", "s", "t"])
b2a = b2.alias()
eq_([c.name for c in b2a.c], ["x", "q", "p", "r", "s", "t"])
self.assert_compile(
select(b2), "SELECT b.x, b.q, b.p, b.r, b.s, b.t FROM b"
)
b2a_1 = b2.alias()
self.assert_compile(
select(b2a_1),
"SELECT b_1.x, b_1.q, b_1.p, b_1.r, b_1.s, b_1.t FROM b AS b_1",
)
# reflecting the related table
a2 = Table("a", m2, autoload_with=connection)
# the existing alias doesn't know about it
with expect_raises_message(
sa.exc.InvalidRequestError,
"Foreign key associated with column 'Anonymous alias of b.r' "
"could not find "
"table 'a' with which to generate a foreign key to target "
"column 'x'",
):
select(b2a_1).join(a2).compile()
# can still join manually (needed to fix inside of util for this...)
self.assert_compile(
select(b2a_1).join(a2, b2a_1.c.r == a2.c.x),
"SELECT b_1.x, b_1.q, b_1.p, b_1.r, b_1.s, b_1.t "
"FROM b AS b_1 JOIN a ON b_1.r = a.x",
)
# a new alias does know about it however
self.assert_compile(
select(b2.alias()).join(a2),
"SELECT b_1.x, b_1.q, b_1.p, b_1.r, b_1.s, b_1.t "
"FROM b AS b_1 JOIN a ON a.x = b_1.r",
)
class ReflectionCacheTest(fixtures.TestBase):
@testing.fixture(params=["arg", "kwarg"])
def cache(self, connection, request):
dialect = connection.dialect
info_cache = {}
counter = itertools.count(1)
@cache
def get_cached_name(self, connection, *args, **kw):
return next(counter)
def get_cached_name_via_arg(name):
return get_cached_name(
dialect, connection, name, info_cache=info_cache
)
def get_cached_name_via_kwarg(name):
return get_cached_name(
dialect, connection, name=name, info_cache=info_cache
)
if request.param == "arg":
yield get_cached_name_via_arg
elif request.param == "kwarg":
yield get_cached_name_via_kwarg
else:
assert False
@testing.fixture(params=[False, True])
def quote(self, request):
yield request.param
def test_single_string(self, cache):
# new value
eq_(cache("name1"), 1)
# same value, counter not incremented
eq_(cache("name1"), 1)
def test_multiple_string(self, cache):
# new value
eq_(cache("name1"), 1)
eq_(cache("name2"), 2)
# same values, counter not incremented
eq_(cache("name1"), 1)
eq_(cache("name2"), 2)
def test_single_quoted_name(self, cache, quote):
# new value
eq_(cache(quoted_name("name1", quote=quote)), 1)
# same value, counter not incremented
eq_(cache(quoted_name("name1", quote=quote)), 1)
def test_multiple_quoted_name(self, cache, quote):
# new value
eq_(cache(quoted_name("name1", quote=quote)), 1)
eq_(cache(quoted_name("name2", quote=quote)), 2)
# same values, counter not incremented
eq_(cache(quoted_name("name1", quote=quote)), 1)
eq_(cache(quoted_name("name2", quote=quote)), 2)
def test_single_quoted_name_and_string(self, cache, quote):
# new values
eq_(cache(quoted_name("n1", quote=quote)), 1)
eq_(cache("n1"), 2)
# same values, counter not incremented
eq_(cache(quoted_name("n1", quote=quote)), 1)
eq_(cache("n1"), 2)
def test_multiple_quoted_name_and_string(self, cache, quote):
# new values
eq_(cache(quoted_name("n1", quote=quote)), 1)
eq_(cache(quoted_name("n2", quote=quote)), 2)
eq_(cache("n1"), 3)
eq_(cache("n2"), 4)
# same values, counter not incremented
eq_(cache(quoted_name("n1", quote=quote)), 1)
eq_(cache(quoted_name("n2", quote=quote)), 2)
eq_(cache("n1"), 3)
eq_(cache("n2"), 4)
def test_single_quoted_name_false_true_and_string(self, cache, quote):
# new values
eq_(cache(quoted_name("n1", quote=quote)), 1)
eq_(cache(quoted_name("n1", quote=not quote)), 2)
eq_(cache("n1"), 3)
# same values, counter not incremented
eq_(cache(quoted_name("n1", quote=quote)), 1)
eq_(cache(quoted_name("n1", quote=not quote)), 2)
eq_(cache("n1"), 3)
def test_multiple_quoted_name_false_true_and_string(self, cache, quote):
# new values
eq_(cache(quoted_name("n1", quote=quote)), 1)
eq_(cache(quoted_name("n2", quote=quote)), 2)
eq_(cache(quoted_name("n1", quote=not quote)), 3)
eq_(cache(quoted_name("n2", quote=not quote)), 4)
eq_(cache("n1"), 5)
eq_(cache("n2"), 6)
# same values, counter not incremented
eq_(cache(quoted_name("n1", quote=quote)), 1)
eq_(cache(quoted_name("n2", quote=quote)), 2)
eq_(cache(quoted_name("n1", quote=not quote)), 3)
eq_(cache(quoted_name("n2", quote=not quote)), 4)
eq_(cache("n1"), 5)
eq_(cache("n2"), 6)
def test_multiple_quoted_name_false_true_and_string_arg_and_kwarg(
self, connection, quote
):
dialect = connection.dialect
info_cache = {}
counter = itertools.count(1)
@cache
def get_cached_name(self, connection, *args, **kw):
return next(counter)
def cache_(*args, **kw):
return get_cached_name(
dialect, connection, *args, **kw, info_cache=info_cache
)
# new values
eq_(cache_(quoted_name("n1", quote=quote)), 1)
eq_(cache_(name=quoted_name("n1", quote=quote)), 2)
eq_(cache_(quoted_name("n2", quote=quote)), 3)
eq_(cache_(name=quoted_name("n2", quote=quote)), 4)
eq_(cache_(quoted_name("n1", quote=not quote)), 5)
eq_(cache_(name=quoted_name("n1", quote=not quote)), 6)
eq_(cache_(quoted_name("n2", quote=not quote)), 7)
eq_(cache_(name=quoted_name("n2", quote=not quote)), 8)
eq_(cache_("n1"), 9)
eq_(cache_(name="n1"), 10)
eq_(cache_("n2"), 11)
eq_(cache_(name="n2"), 12)
# same values, counter not incremented
eq_(cache_(quoted_name("n1", quote=quote)), 1)
eq_(cache_(name=quoted_name("n1", quote=quote)), 2)
eq_(cache_(quoted_name("n2", quote=quote)), 3)
eq_(cache_(name=quoted_name("n2", quote=quote)), 4)
eq_(cache_(quoted_name("n1", quote=not quote)), 5)
eq_(cache_(name=quoted_name("n1", quote=not quote)), 6)
eq_(cache_(quoted_name("n2", quote=not quote)), 7)
eq_(cache_(name=quoted_name("n2", quote=not quote)), 8)
eq_(cache_("n1"), 9)
eq_(cache_(name="n1"), 10)
eq_(cache_("n2"), 11)
eq_(cache_(name="n2"), 12)
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