--- /dev/null
+.. change::
+ :tags: bug, sql, sqlite
+ :tickets: 6007
+
+ Fixed issue where the CHECK constraint generated by :class:`_types.Boolean`
+ or :class:`_types.Enum` would fail to render the naming convention
+ correctly after the first compilation, due to an unintended change of state
+ within the name given to the constraint. This issue was first introduced in
+ 0.9 in the fix for issue #3067, and the fix revises the approach taken at
+ that time which appears to have been more involved than what was needed.
\ No newline at end of file
def format_constraint(self, constraint, _alembic_quote=True):
naming = util.preloaded.sql_naming
- if isinstance(constraint.name, elements._defer_name):
+ if constraint.name is elements._NONE_NAME:
name = naming._constraint_name_for_table(
constraint, constraint.table
)
if name is None:
- if isinstance(constraint.name, elements._defer_none_name):
- return None
- else:
- name = constraint.name
+ return None
else:
name = constraint.name
__slots__ = ()
-class _defer_name(_truncated_label):
- """mark a name as 'deferred' for the purposes of automated name
- generation.
-
- """
-
- __slots__ = ()
-
- def __new__(cls, value):
- if value is None:
- return _NONE_NAME
- elif isinstance(value, conv):
- return value
- else:
- return super(_defer_name, cls).__new__(cls, value)
-
- def __reduce__(self):
- return self.__class__, (util.text_type(self),)
-
-
-class _defer_none_name(_defer_name):
- """indicate a 'deferred' name that was ultimately the value None."""
-
- __slots__ = ()
-
-
-_NONE_NAME = _defer_none_name("_unnamed_")
+_NONE_NAME = util.symbol("NONE_NAME")
+"""indicate a 'deferred' name that was ultimately the value None."""
# for backwards compatibility in case
# someone is re-implementing the
import re
from . import events # noqa
-from .elements import _defer_name
-from .elements import _defer_none_name
+from .elements import _NONE_NAME
from .elements import conv
from .schema import CheckConstraint
from .schema import Column
return getattr(col, attrname)
def _key_constraint_name(self):
- if isinstance(self._const_name, (type(None), _defer_none_name)):
+ if self._const_name in (None, _NONE_NAME):
raise exc.InvalidRequestError(
"Naming convention including "
"%(constraint_name)s token requires that "
and (
const.name is None
or "constraint_name" in convention
- or isinstance(const.name, _defer_name)
+ or const.name is _NONE_NAME
)
):
return conv(
convention
% ConventionDict(const, table, metadata.naming_convention)
)
- elif isinstance(convention, _defer_none_name):
+ elif convention is _NONE_NAME:
return None
)
elif isinstance(table, Table):
- if isinstance(const.name, (conv, _defer_name)):
+ if isinstance(const.name, conv) or const.name is _NONE_NAME:
return
newname = _constraint_name_for_table(const, table)
from .base import _bind_or_error
from .base import NO_ARG
from .base import SchemaEventTarget
-from .elements import _defer_name
+from .elements import _NONE_NAME
from .elements import quoted_name
from .elements import Slice
from .elements import TypeCoerce as type_coerce # noqa
e = schema.CheckConstraint(
type_coerce(column, self).in_(self.enums),
- name=_defer_name(self.name),
+ name=_NONE_NAME if self.name is None else self.name,
_create_rule=util.portable_instancemethod(
self._should_create_constraint,
{"variant_mapping": variant_mapping},
e = schema.CheckConstraint(
type_coerce(column, self).in_([0, 1]),
- name=_defer_name(self.name),
+ name=_NONE_NAME if self.name is None else self.name,
_create_rule=util.portable_instancemethod(
self._should_create_constraint,
{"variant_mapping": variant_mapping},
dialect="default",
)
- def test_uq_defer_name_no_convention(self):
- u1 = self._fixture(naming_convention={})
- uq = UniqueConstraint(u1.c.data, name=naming._defer_name("myname"))
- self.assert_compile(
- schema.AddConstraint(uq),
- 'ALTER TABLE "user" ADD CONSTRAINT myname UNIQUE (data)',
- dialect="default",
- )
-
def test_uq_defer_name_convention(self):
u1 = self._fixture(
naming_convention={"uq": "uq_%(table_name)s_%(column_0_name)s"}
)
- uq = UniqueConstraint(u1.c.data, name=naming._defer_name("myname"))
+ uq = UniqueConstraint(u1.c.data, name=naming._NONE_NAME)
self.assert_compile(
schema.AddConstraint(uq),
'ALTER TABLE "user" ADD CONSTRAINT uq_user_data UNIQUE (data)',
u1 = self._fixture(
naming_convention={"ck": "ck_%(table_name)s_%(constraint_name)s"}
)
- ck = CheckConstraint(u1.c.data == "x", name=naming._defer_name(None))
+ ck = CheckConstraint(u1.c.data == "x", name=naming._NONE_NAME)
assert_raises_message(
exc.InvalidRequestError,
m1,
Column("x", Boolean(name="foo", create_constraint=True)),
)
- # constraint is not hit
- eq_(
- [c for c in u1.constraints if isinstance(c, CheckConstraint)][
- 0
- ].name,
- "foo",
+
+ self.assert_compile(
+ schema.CreateTable(u1),
+ 'CREATE TABLE "user" ('
+ "x BOOLEAN, "
+ "CONSTRAINT ck_user_foo CHECK (x IN (0, 1))"
+ ")",
)
- # but is hit at compile time
+
+ # test no side effects from first compile
self.assert_compile(
schema.CreateTable(u1),
'CREATE TABLE "user" ('
m1,
Column("x", Enum("a", "b", name="foo", create_constraint=True)),
)
- eq_(
- [c for c in u1.constraints if isinstance(c, CheckConstraint)][
- 0
- ].name,
- "foo",
+
+ self.assert_compile(
+ schema.CreateTable(u1),
+ 'CREATE TABLE "user" ('
+ "x VARCHAR(1), "
+ "CONSTRAINT ck_user_foo CHECK (x IN ('a', 'b'))"
+ ")",
)
- # but is hit at compile time
+
+ # test no side effects from first compile
self.assert_compile(
schema.CreateTable(u1),
'CREATE TABLE "user" ('
projects / thirdparty / sqlalchemy / sqlalchemy.git / commitdiff
