Hello Mike,
Yes that’s using the plugin:
sqlalchemy[mypy,postgresql_psycopg2binary]==1.4.29 I changed the function
declaration to this:
@staticmethod
def create(dbsession: Session, name: str, id_:
typing.Union[uuid.UUID, sqlalchemy.dialects.postgresql.base.UUID] = None):
and it seems to work. In a similar vain, how do I manage the types of
mapped and unmapped objects? Following the above example:
user = User(dbsession, "Joe Black")
returns an unmapped, simple User object. Now suppose I have another
existing, mapped User object and would like to assign that newly created
unmapped user:
other_user.spouse = user
which creates the following error:
error: Argument "spouse" to "User" has incompatible type "User"; expected
"Mapped[Any]" [arg-type]
Declaring that column with:
spouse: typing.Union[Mapped[User], User] = relationship("User",
back_populates="spouse", uselist=False)
seems to work; I just want to make sure that that’s a recommended way of
going about this? Should I always declare a type as a Union between a
mapped and unmapped same class?
Other than following the migration guide
<https://docs.sqlalchemy.org/en/14/changelog/migration_20.html>, I haven’t
looked into SQLA2 <https://github.com/sqlalchemy/sqlalchemy/projects/3>.
Jens
On Thursday, January 13, 2022 at 11:52:18 PM UTC+10 Mike Bayer wrote:
> is this with the SQLAlchemy Mypy plugin? current status is for 2.0 we
> are looking to move away from the plugin model and pretty much change how
> these things work. Otherwise if this is with the plugin, you would use
> "id: Mapped[uuid.UUID] = ..."
>
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