python - Concepts of backref and back_populate in SQLalchemy? ...
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!https://stackoverflow.com/questions/51335298/concepts-of-backref-and-back-populate-in-sqlalchemy#answer-59920780

Date: March 6, 2024

External Link stackoverflow.com

Today I came across some sqlalchemy models that created some relationships, some used backref some used back_populates. I was stumped why, I had never came accross backref before and I felt skill issues sinking in.

backref is considered legacy
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https://docs.sqlalchemy.org/en/14/orm/backref.html

As stated in the sqlalchemy docs, backref is a legacy feature. Its shorthand to creating relationships between parent and child, but only adding it to the parent. While this is simpler it introduces some invisible magic.