(X-Post from Stackoverflow: http://stackoverflow.com/q/36511941/703040)


I'm writing some custom code for Alembic to keep my database always updated 
in my dev environment for a project. The project involves a database with 
the following:

   - A public schema for shared data
   - A single schema per client "database"
   - One schema that acts as a prototype for all of the client schemas 
   (orgs)
   
At this moment, I'm not worried about the multiple client schemas, only 
keeping the public and prototype schemas up-to-date. My env.py script works 
great for the public schema, but not prototype because alembic is trying to 
use the version table from public when working with prototype.

So, I thought I could use the version_table_schema 
<http://alembic.readthedocs.org/en/latest/api/runtime.html?highlight=version_table_schema#alembic.runtime.environment.EnvironmentContext.configure.params.version_table_schema>
 option 
to maintain one version table in the public schema and one in the prototype 
schema. 
However, as soon as I start using that, I get a '*relation 
"public.alembic_version" does not exist*' error when I attempt to do the 
upgrade.

The only difference that I see is that, when I use version_table_schema set 
to the appropriate schema, the generated revision scripts actually contain 
a line to op.drop_table('alembic_version'). The line ONLY exists when 
version_table_schema is in use.

I'm hoping that I'm just missing something minor.


I've posted the source files on SO already 
<http://stackoverflow.com/q/36511941/703040> if they are helpful.


Thanks!

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