On Thu, Aug 30, 2018 at 7:11 AM, sector119 <sector...@gmail.com> wrote:
> 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
can you share your env.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> 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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>
> --
> SQLAlchemy -
> The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
>
> To post example code, please provide an MCVE: Minimal, Complete, and
> Verifiable Example. See http://stackoverflow.com/help/mcve for a full
> description.
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--
SQLAlchemy -
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http://www.sqlalchemy.org/
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