Hi, I'm trying to upgrade from 1.2.2 to 1.3.15 and a number of our relations have started generating these warnings: ``` SAWarning: Setting backref / back_populates on relationship <child.parent> to refer to viewonly relationship <parent.children> will be deprecated in SQLAlchemy 1.4, and will be disallowed in a future release. viewonly relationships should not be mutated (this warning may be suppressed after 10 occurrences) (self, other), ```
I've read some of the related issues, e.g. https://github.com/sqlalchemy/sqlalchemy/issues/5149, https://github.com/sqlalchemy/sqlalchemy/issues/ <https://github.com/sqlalchemy/sqlalchemy/issues/5149>4993, but I don't understand how backref comes into it. We don't want to mutate anything along the backref. Is there a way of expressing a two-way read-only relation? The code looks like ``` class Parent(Base): pass class Child1(Base): @declared_attr def parent(cls): return orm.relationship( Parent, ..., viewonly=True, backref="children1" ) class Child2(Base): [etc] ```` -- 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 sqlalchemy+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sqlalchemy/660cedf0-7066-42fe-93bc-d6e4d223b05c%40googlegroups.com.
