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.
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