put dependency models into your main application, not the alembic directory.
the "env.py" file is loaded through a special per-file loader, so it isn't
really part of a Python "package" per se. the other things that env.py needs,
have them import from your normal application, e.g. "from myapp.migrations
import x, y, z".
On Apr 21, 2014, at 3:36 PM, Maxime Lévesque <maxime.leves...@gmail.com> wrote:
>
> Having the same need, I'd like to know if there is a way to do this.
>
> Thanks
>
> On Thursday, November 14, 2013 4:24:40 AM UTC-5, Michal Nowikowski wrote:
> Hello,
>
> I observed that I repeat myself in upgrade modules.
> So I concluded that it would be good to put that code into separate python
> module and then just import it in upgrade modules.
> I put my code in alembic/common.py just beside env.py.
> Unfortunately it is not so easy.
> Current working directory is 2 levels up regarding alembic/versions and to
> import anything from alembic/common.py
> I have to tweak sys,path and I cannot just add "../.." due to compelxity of
> my project.
> I wanted to do it using:
> from alembic import context
> sys.path.append(context.config.get_main_option("script_location"))
> from common import add_ref, drop_ref
> But it does not work:
> $ alembic history
> Traceback (most recent call last):
> File "/usr/bin/alembic", line 9, in <module>
> load_entry_point('alembic==0.4.1', 'console_scripts', 'alembic')()
> File "/usr/lib/python2.7/dist-packages/alembic/config.py", line 255, in main
> CommandLine(prog=prog).main(argv=argv)
> File "/usr/lib/python2.7/dist-packages/alembic/config.py", line 250, in main
> self.run_cmd(cfg, options)
> File "/usr/lib/python2.7/dist-packages/alembic/config.py", line 241, in
> run_cmd
> **dict((k, getattr(options, k)) for k in kwarg)
> File "/usr/lib/python2.7/dist-packages/alembic/command.py", line 156, in
> history
> for sc in script.walk_revisions():
> File "/usr/lib/python2.7/dist-packages/alembic/script.py", line 72, in
> walk_revisions
> heads = set(self.get_heads())
> File "/usr/lib/python2.7/dist-packages/alembic/script.py", line 269, in
> get_heads
> for script in self._revision_map.values():
> File "/usr/lib/python2.7/dist-packages/alembic/util.py", line 220, in
> __get__
> obj.__dict__[self.__name__] = result = self.fget(obj)
> File "/usr/lib/python2.7/dist-packages/alembic/script.py", line 201, in
> _revision_map
> script = Script._from_filename(self.versions, file_)
> File "/usr/lib/python2.7/dist-packages/alembic/script.py", line 422, in
> _from_filename
> module = util.load_python_file(dir_, filename)
> File "/usr/lib/python2.7/dist-packages/alembic/util.py", line 186, in
> load_python_file
> module = imp.load_source(module_id, path, open(path, 'rb'))
> File "alembic/versions/31802014a5db_create_product_recor.py", line 18, in
> <module>
> sys.path.append(context.config.get_main_option("script_location"))
> AttributeError: 'module' object has no attribute 'config'
>
> Do you now how to handle this?
>
> Regards,
> Godfryd
>
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