Mike, but in run_migrations_online() I use conn =
connection.execution_options(schema_translate_map={None: schema_name})
But I get no schemas at resulting alembic/versions/file.py
среда, 29 августа 2018 г., 20:46:07 UTC+3 пользователь Mike Bayer написал:
>
> On Wed, Aug 29, 2018 at 5:12 AM, sector119 <sect...@gmail.com
> <javascript:>> wrote:
> > Hello
> >
> > I have N schemas with the same set of tables, 1 system schema with
> users,
> > groups, ... tables and 6 schemas with streets, organizations,
> transactions,
> > ... tables.
> > On those schemas tables I don't set __table_args__ = ({'schema':
> SCHEMA},)
> > I just call dbsession.execute('SET search_path TO system, %s' % SCHEMA)
> > before sql queries.
> >
> > When I make some changes in my model structures I want to refactor table
> in
> > all schemas using Alembic, how can I do that?
> > Maybe I can make some loop over my schemas somewhere?
>
> setting the search path is going to confuse SQLAlchemy's table
> reflection process, such that it assumes a Table of a certain schema
> does not require a "schema" argument, because it is already in the
> search path.
>
> Keep the search path set to "public", see
>
> http://docs.sqlalchemy.org/en/latest/dialects/postgresql.html#remote-schema-table-introspection-and-postgresql-search-path.
>
>
> There is an option to change this behavior mentioned in that
> section called postgresql_ignore_search_path, however it isn't
> guaranteed to suit all use cases. if that makes your case work, then
> that would be all you need. if not, then read on...
>
> For the officially supported way to do this, you want to have the
> explicit schema name inside the SQL - but this can be automated for a
> multi-tenancy application. Use the schema translation map feature:
>
> http://docs.sqlalchemy.org/en/latest/core/connections.html?highlight=execution_options#schema-translating.
>
>
>
>
> >
> >
> > Thanks
> >
> > --
> > SQLAlchemy -
> > The Python SQL Toolkit and Object Relational Mapper
> >
> > http://www.sqlalchemy.org/
> >
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--
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http://www.sqlalchemy.org/
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