Hello,
I’m curious to get recommendations about the following use-case (based on this
SO Answer
<https://stackoverflow.com/questions/50927740/sqlalchemy-create-schema-if-not-exists#55345404>
):
*>>> import sqlalchemy*
*>>> configuration = {'sqlalchemy.url':
'postgresql+psycopg2://postgres:postgres@localhost/test_db'}*
*>>> engine = sqlalchemy.engine_from_config(configuration, future=True)*
*>>> engine.dialect.has_schema(engine, schema)Traceback (most recent call
last): File "<stdin>", line 1, in <module> File
"/.../lib/python3.10/site-packages/sqlalchemy/dialects/postgresql/base.py",
line 3360, in has_schema cursor = connection.execute( File
"/.../lib/python3.10/site-packages/sqlalchemy/future/engine.py", line 320,
in _not_implemented raise NotImplementedError(NotImplementedError: This
method is not implemented for SQLAlchemy 2.0.*
This works if I turn off the future
<https://docs.sqlalchemy.org/en/14/core/engines.html#sqlalchemy.create_engine.params.future>
flag:
*>>> engine = sqlalchemy.engine_from_config(configuration)>>>
engine.dialect.has_schema(engine, schema)False*
Is there a fix coming? Is there an alternative suggestion? Interestingly, I
wasn’t able to find *has_schema()* in SQLA v1.4
<https://docs.sqlalchemy.org/en/14/core/internals.html#sqlalchemy.engine.Dialect>
(although
v0.7 says it was added
<https://docs.sqlalchemy.org/en/14/search.html?q=has_schema>) but only for SQLA
v2
<https://docs.sqlalchemy.org/en/20/core/internals.html#sqlalchemy.engine.Dialect.has_schema>
.
For now I can use an “old” engine to check for schema, and the switch to a
new one, but what’s the current recommendation?
Much thanks!
Jens
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