I want to use UUID v7 with this package:
https://github.com/aminalaee/uuid-utils/
Here's my current code:
from sqlalchemy.dialects.postgresql import UUID as POSTGRES_UUID
from sqlalchemy.orm import Mapped, as_declarative, mapped_column
from uuid_utils import UUID, uuid7
from db.dependencies import get_db
@as_declarative()
class Base:
pass
class Test(Base):
__tablename__: str = "test"
id: Mapped[UUID] = mapped_column(POSTGRES_UUID(as_uuid=True),
primary_key=True, default=uuid7)
a = Test()
with get_db() as db:
db.add(a)
db.commit()
which throws this error
Traceback (most recent call last):
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/base.py",
line 1965, in _exec_single_context
self.dialect.do_execute(
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/default.py",
line 921, in do_execute
cursor.execute(statement, parameters)
psycopg2.ProgrammingError: can't adapt type 'uuid_utils.UUID'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/dci-ng/test6.py", line 35, in <module>
db.commit()
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/session.py",
line 1923, in commit
trans.commit(_to_root=True)
File "<string>", line 2, in commit
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/state_changes.py",
line 139, in _go
ret_value = fn(self, *arg, **kw)
^^^^^^^^^^^^^^^^^^^^
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/session.py",
line 1239, in commit
self._prepare_impl()
File "<string>", line 2, in _prepare_impl
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/state_changes.py",
line 139, in _go
ret_value = fn(self, *arg, **kw)
^^^^^^^^^^^^^^^^^^^^
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/session.py",
line 1214, in _prepare_impl
self.session.flush()
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/session.py",
line 4179, in flush
self._flush(objects)
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/session.py",
line 4314, in _flush
with util.safe_reraise():
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/util/langhelpers.py",
line 146, in __exit__
raise exc_value.with_traceback(exc_tb)
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/session.py",
line 4275, in _flush
flush_context.execute()
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/unitofwork.py",
line 466, in execute
rec.execute(self)
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/unitofwork.py",
line 642, in execute
util.preloaded.orm_persistence.save_obj(
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/persistence.py",
line 93, in save_obj
_emit_insert_statements(
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/orm/persistence.py",
line 1226, in _emit_insert_statements
result = connection.execute(
^^^^^^^^^^^^^^^^^^^
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/base.py",
line 1412, in execute
return meth(
^^^^^
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/sql/elements.py",
line 516, in _execute_on_connection
return connection._execute_clauseelement(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/base.py",
line 1635, in _execute_clauseelement
ret = self._execute_context(
^^^^^^^^^^^^^^^^^^^^^^
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/base.py",
line 1844, in _execute_context
return self._exec_single_context(
^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/base.py",
line 1984, in _exec_single_context
self._handle_dbapi_exception(
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/base.py",
line 2339, in _handle_dbapi_exception
raise sqlalchemy_exception.with_traceback(exc_info[2]) from e
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/base.py",
line 1965, in _exec_single_context
self.dialect.do_execute(
File
"/home/dev/.local/lib/python3.11/site-packages/sqlalchemy/engine/default.py",
line 921, in do_execute
cursor.execute(statement, parameters)
sqlalchemy.exc.ProgrammingError: (psycopg2.ProgrammingError) can't adapt
type 'uuid_utils.UUID'
[SQL: INSERT INTO test (id) VALUES (%(id)s::UUID)]
[parameters: {'id': UUID('018af275-54b2-709a-9ab2-8a7492d8ee9b')}]
(Background on this error at: https://sqlalche.me/e/20/f405)
I've found a workaround to import the native uuid package and set the
default attribute to: lambda _: NATIVEUUID(uuid7().hex) but I wanted to
ask if there's a more elegant way to do it?
Thanks in advance and kind regards
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
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