On 6/17/15 2:38 PM, Reece Hart wrote:
this line here:
File "alembic/env.py", line 87, in run_migrations_online
target_metadata=target_metadata.get(name)
is part of something that was coded on your end, because it is in
env.py. The MetaData object doesn't have a get() method. It
does have a ".tables" dictionary from which you can call get(),
however, but that would return a Table object, not a MetaData object.
So you'd need to fix your env.py here.
I got here by following the alembic tutorial. Specifically, I did
`alembic init alembic --template multidb`, which generated the env.py.
Then, following along from
https://alembic.readthedocs.org/en/latest/autogenerate.html, I added
from myapp.mymodel import Base
target_metadata = Base.metadata
The expression `target_metadata=target_metadata.get(name),` comes from
the env.py provided during alembic init.
What am I missing?
The documentation assumes use of the default template, not the "multidb"
template which is more of an example for specialized use cases.
Consult the source code of env.py within multidb if you want to continue
with that template. I've added a note clarifying this in the docs,
however RTD is not managing to build it, so for now the note reads:
Note
The above example refers to the *generic alembic env.py template*, e.g.
the one created by default when calling upon |alembic init|, and not the
special-use templates such as |multidb|. Please consult the source code
and comments within the |env.py| script directly for specific guidance
on where and how the autogenerate metadata is established.
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