fix: allow clearing event description via PATCH

src/app/api/events/[id]/route.ts

@@ -196,13 +196,29 @@ export async function PATCH(request: NextRequest, context: RouteContext) {
       }
     }
 
-    const updated = await eventQueries.update(eventId, session.user_id, {
+    // Pass description directly (including null) so it can be cleared.
+    // Only omit if the key was not present in the request body at all.
+    const updateData: {
+      title?: string;
+      description?: string | null;
+      event_date?: string;
+      event_time?: string;
+      location?: string;
+    } = {
       title: title?.trim(),
-      description: description ?? undefined,
       event_date: eventDate,
       event_time: eventTime,
       location: location?.trim(),
-    });
+    };
+    if ("description" in body) {
+      updateData.description = description ?? null;
+    }
+
+    const updated = await eventQueries.update(
+      eventId,
+      session.user_id,
+      updateData,
+    );
 
     if (!updated) {
       return NextResponse.json(

src/lib/db.ts

@@ -621,11 +621,18 @@ export const eventQueries = {
     },
   ): Promise<Event | null> => {
     try {
+      // For description, distinguish between "not provided" (undefined) and
+      // "explicitly cleared" (null). COALESCE would treat both as keeping
+      // the old value, so we use a CASE expression instead.
+      const isDescriptionProvided = data.description !== undefined;
       const result = await sql`
         UPDATE events
         SET
           title = COALESCE(${data.title ?? null}, title),
-          description = COALESCE(${data.description ?? null}, description),
+          description = CASE
+            WHEN ${isDescriptionProvided} THEN ${data.description ?? null}
+            ELSE description
+          END,
           event_date = COALESCE(${data.event_date ?? null}, event_date),
           event_time = COALESCE(${data.event_time ?? null}, event_time),
           location = COALESCE(${data.location ?? null}, location)