From e3e3fa9da4d1fea8d2b0f0c16a638b30b53b773e Mon Sep 17 00:00:00 2001
From: Matt <matt@letsbe.solutions>
Date: Thu, 5 Feb 2026 14:14:19 +0100
Subject: [PATCH] Fix AI assignment errors and tag matching

- Add missing updatedAt column to AssignmentJob table
- Fix algorithmic assignment to use AI-assigned projectTags instead of raw CSV tags
- Add case-insensitive tag matching for better expertise matching
- Scores should now properly reflect tag matches between judges and projects

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 .../migration.sql                             | 11 ++++++++++
 src/server/routers/assignment.ts              | 22 ++++++++++++++-----
 2 files changed, 28 insertions(+), 5 deletions(-)
 create mode 100644 prisma/migrations/20260205210000_fix_assignment_job_updated_at/migration.sql

diff --git a/prisma/migrations/20260205210000_fix_assignment_job_updated_at/migration.sql b/prisma/migrations/20260205210000_fix_assignment_job_updated_at/migration.sql
new file mode 100644
index 0000000..c5de518
--- /dev/null
+++ b/prisma/migrations/20260205210000_fix_assignment_job_updated_at/migration.sql
@@ -0,0 +1,11 @@
+-- Add missing updatedAt column to AssignmentJob table
+
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name = 'AssignmentJob' AND column_name = 'updatedAt'
+    ) THEN
+        ALTER TABLE "AssignmentJob" ADD COLUMN "updatedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP;
+    END IF;
+END $$;
diff --git a/src/server/routers/assignment.ts b/src/server/routers/assignment.ts
index d32d3ae..f1e9d38 100644
--- a/src/server/routers/assignment.ts
+++ b/src/server/routers/assignment.ts
@@ -613,6 +613,9 @@ export const assignmentRouter = router({
           id: true,
           title: true,
           tags: true,
+          projectTags: {
+            include: { tag: { select: { name: true } } },
+          },
           _count: { select: { assignments: true } },
         },
       })
@@ -656,13 +659,22 @@ export const assignmentRouter = router({
             const reasoning: string[] = []
             let score = 0
 
-            // Expertise match (35% weight)
-            const matchingTags = juror.expertiseTags.filter((tag) =>
-              project.tags.includes(tag)
-            )
+            // Expertise match (35% weight) - use AI-assigned projectTags if available
+            const projectTagNames = project.projectTags.map((pt) => pt.tag.name.toLowerCase())
+
+            // Match against AI-assigned tags first, fall back to raw tags
+            const matchingTags = projectTagNames.length > 0
+              ? juror.expertiseTags.filter((tag) =>
+                  projectTagNames.includes(tag.toLowerCase())
+                )
+              : juror.expertiseTags.filter((tag) =>
+                  project.tags.map((t) => t.toLowerCase()).includes(tag.toLowerCase())
+                )
+
+            const totalTags = projectTagNames.length > 0 ? projectTagNames.length : project.tags.length
             const expertiseScore =
               matchingTags.length > 0
-                ? matchingTags.length / Math.max(project.tags.length, 1)
+                ? matchingTags.length / Math.max(totalTags, 1)
                 : 0
             score += expertiseScore * 35
             if (matchingTags.length > 0) {