How to support reflect with a dict of table names and database views about alchy

[dgilland]

It looks like SQLAlchemy's reflect() method supports an only argument that can be used to limit the reflection to subset of table names. However, alchy doesn't expose that option in the Manager.reflect() method (but obviously you can subclass it to extend that behavior).

For view, SQLAlchemy has a way to reflect views: http://docs.sqlalchemy.org/en/latest/core/reflection.html#reflecting-views

[gsvitak]

Thanks for the info. Can you please provide an example of how to use the only parameter?

I only have 1 database and when I pass a dictionary to the method of the table names, I get a message stating that the mapping is not available in SQLALCHEMY_BINDS object.

Thanks,
G

[dgilland]

What's your code that produces the error?

[gsvitak]

Thanks for the offer to help.

class Base(ModelBase):
    # extend/override ModelBase if necessary
    pass

Model = make_declarative_base(Base=Base)

config = {
    'SQLALCHEMY_DATABASE_URI': conn_string,
}

reflect_tables = ['people']
db = Manager(config=config, Model=Model)
db.reflect(reflect_tables)

[dgilland]

alchy.Manager.reflect doesn't support the only argument. That's something that's supported in SQLAlchemy's reflect() method but alchy doesn't curry that argument to it unfortunately. So you would need to extend Manager:

• https://github.com/dgilland/alchy/blob/develop/alchy/manager.py#L279
• https://github.com/dgilland/alchy/blob/develop/alchy/manager.py#L249

[gsvitak]

Oh.. stupid on my part.. I misread your previous response. Thanks.

Greg