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Asked: 2026-05-11T01:58:50+00:00

I’m using an ORM (SQLAlchemy, but my question is quite implementation-agnostic) to model a

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I’m using an ORM (SQLAlchemy, but my question is quite implementation-agnostic) to model a many-to-many relationship between a parent class and its children.. I was wondering, what would be a simple way to express the concept ‘one of the children is the default/main one’?

For example, I’d need to persist the following:
This Person instance has Address X and Y, the main one is Y.

I saw this implemented using a ‘middle’ class like ‘PersonAddressRelation’ that would contain ‘Person’, ‘Address’ and the ‘main’ flag, but I think it looks a bit cumbersome.. Is there a better way?

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1 Answer

  1. The simplest way would be to have a join table, PersonAddressRelation, and also a DefaultAddress column on the Person table that keys to the Address table.

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