this is a bug. however, the Query object is legacy. what is your actual use
case? there are better ways to achieve them now.
On Thu, Feb 25, 2021, at 3:25 PM, Ahmed wrote:
> Hello,
>
> It seems that SQLAlchemy 1.4.0b3 ignores relationship() query_class
> parameter. Here's the snippet that works with 1.3 but doesn't with 1.4:
>
> class Parent(db.Model):
> __tablename__ = "todo"
> id = db.Column(db.Integer, primary_key=True)
> # ... Column mappings
> children = db.relationship("Child", backref="todo",
> query_class=DerivedQuery, lazy="dynamic")
>
> class Child(db.Model):
> __tablename__ = "todo"
> # ... Column mappings
> parent_id = db.Column(db.Integer, db.ForeignKey("todo.id"))
>
> assert isinstance(p.children, DerivedQuery)
>
> In 1.4, children attribute is always an instance of AppenderQuery regardless
> of the query_class value. I might have missed something above though.
>
>
>
> --
> 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 view this discussion on the web visit
> https://groups.google.com/d/msgid/sqlalchemy/4454277c-b3a1-484e-b0e5-aef3e72eeb01n%40googlegroups.com
>
> <https://groups.google.com/d/msgid/sqlalchemy/4454277c-b3a1-484e-b0e5-aef3e72eeb01n%40googlegroups.com?utm_medium=email&utm_source=footer>.
--
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 view this discussion on the web visit
https://groups.google.com/d/msgid/sqlalchemy/03df1372-8aa8-4189-b74f-e01c43859fd2%40www.fastmail.com.
