From 563d9a1f5a042906f48438c89e8127b293168d6a Mon Sep 17 00:00:00 2001
From: Max Chis <48846180+maxachis@users.noreply.github.com>
Date: Tue, 22 Jul 2025 11:49:25 -0400
Subject: [PATCH] Update DESIGN-PRINCIPLES.md

---
 DESIGN-PRINCIPLES.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/DESIGN-PRINCIPLES.md b/DESIGN-PRINCIPLES.md
index 9fe02b8..ecf878c 100644
--- a/DESIGN-PRINCIPLES.md
+++ b/DESIGN-PRINCIPLES.md
@@ -247,8 +247,13 @@ The following columns should be present in all tables unless there is a compelli
     - many-to-many: `link_apples_oranges`
 - Link tables should have unique constraints reflective of the particular relationship:
     - one-to-one: separate unique constraints on each foreign key column
-    - one-to-many: unique constraint on the `one` column
+        - `unique(apple_id)`
+        - `unique(orange_id)`
     - many-to-many: single unique constraint encompassing *both* columns
+        - `unique(apple_id, orange_id)`
+    - one-to-many: unique constraint on the `one` column, and a *separate* unique constraint for both columns
+        - `unique(apple_id)`
+        - `unique(apple_id, orange_id)`
 
 # SQLAlchemy