On Thu, Mar 15, 2018 at 2:04 PM, Josh <[email protected]> wrote: > Currently, SQLA lets us use constructs like `child = relationship('Child')`, > where 'Child' is Python code that is evaluated against some global-ish > namespace. (More advanced: "Child.id == Parent.id", etc) > > Is this something that is available as a public library? We'd like to use a > similar pattern in our own mixin - we have a list of models that a model can > link to, and we'd like to be able to say `linked_models = ['ModelA', > 'ModelB']` and have that later be able to return the actual classes. (The > reason why we have this is a bit long and tedious, but it's basically a hack > to avoid circular imports.) > > In other words, is there a function that can do `model_cls = > looup_model(model_name)`?
that's not "public" stuff right now but feel free to peek into it in ext/declarative/clsregistry.py to see how that works, it hasn't changed in a long time. We can add a public function like you describe if someone has the time to work on it (e.g. pull request on github). > > Thanks, > Josh > > -- > 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. > --- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. -- 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. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
