From aac478d8fdf471f5c574c3bac380cf7131dde733 Mon Sep 17 00:00:00 2001
From: Daniel Roth <daniel_roth@hotmail.co.uk>
Date: Tue, 27 Jan 2026 09:20:14 +0000
Subject: [PATCH] add unique index on uprn, element, aspect type, element
 instance

---
 .../db/schema/condition/asset_condition.ts    | 36 +++++++++++--------
 1 file changed, 21 insertions(+), 15 deletions(-)

diff --git a/src/app/db/schema/condition/asset_condition.ts b/src/app/db/schema/condition/asset_condition.ts
index 2b860eb9..5ce9cbbe 100644
--- a/src/app/db/schema/condition/asset_condition.ts
+++ b/src/app/db/schema/condition/asset_condition.ts
@@ -5,28 +5,34 @@ import {
   pgTable,
   integer,
   bigint,
+  uniqueIndex,
 } from "drizzle-orm/pg-core";
-import { sql } from "drizzle-orm";
 import { element } from "./element";
 import { aspectType } from "./aspect_type";
 
 
-export const assetCondition = pgTable("asset_condition", {
-  id: bigserial("id", { mode: "bigint" }).primaryKey(),
+export const assetCondition = pgTable(
+  "asset_condition",
+  {
+    id: bigserial("id", { mode: "bigint" }).primaryKey(),
 
-  uprn: bigint("uprn", { mode: "number" }).notNull(),
+    uprn: bigint("uprn", { mode: "number" }).notNull(),
 
-  element: element("element").notNull(),
-  aspectType: aspectType("aspect_type").notNull(),
+    element: element("element").notNull(),
+    aspectType: aspectType("aspect_type").notNull(),
+    elementInstance: integer("element_instance"),
 
-  value: text("value"),
+    value: text("value"),
 
-  quantity: integer("quantity"),
-  installDate: date("install_date"),
-  renewalYear: integer("renewal_year"),
+    quantity: integer("quantity"),
+    installDate: date("install_date"),
+    renewalYear: integer("renewal_year"),
 
-  elementInstance: integer("element_instance"),
-
-  sourceSystem: text("source_system"),
-  comments: text("comments"),
-});
+    sourceSystem: text("source_system"),
+    comments: text("comments"),
+  },
+  (t) => ({
+    uniq: uniqueIndex("asset_condition_uprn_element_aspect_instance")
+      .on(t.uprn, t.element, t.aspectType, t.elementInstance),
+  })
+);