From 3a11590795d87afd8e67b182d2b135ed9d5b448c Mon Sep 17 00:00:00 2001
From: fullsizemalt <106900403+fullsizemalt@users.noreply.github.com>
Date: Thu, 11 Dec 2025 13:21:05 -0800
Subject: [PATCH] feat(layout): Add Tiers to FacilitySection and Position -
 Added 'tiers' to FacilitySection for multi-level racks - Added 'tier' to
 FacilityPosition for Z-axis addressing - Updated unique constraint for
 positions

---
 backend/prisma/schema.prisma | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/backend/prisma/schema.prisma b/backend/prisma/schema.prisma
index 6708408..91be549 100644
--- a/backend/prisma/schema.prisma
+++ b/backend/prisma/schema.prisma
@@ -587,6 +587,7 @@ model FacilitySection {
   height      Int
   rows        Int      // Grid rows
   columns     Int      // Grid columns
+  tiers       Int      @default(1) // Number of vertical tiers
   spacing     Int      @default(12) // inches between positions
   positions   FacilityPosition[]
   createdAt   DateTime @default(now())
@@ -601,11 +602,12 @@ model FacilityPosition {
   sectionId   String
   row         Int
   column      Int
+  tier        Int      @default(1) // Vertical level (1 = bottom)
   slot        Int      @default(1) // For multi-plant positions
   status      String   @default("EMPTY") // EMPTY, OCCUPIED, RESERVED, DAMAGED
   plant       FacilityPlant?
   
-  @@unique([sectionId, row, column, slot])
+  @@unique([sectionId, row, column, tier, slot])
   @@map("facility_positions")
 }