From 8b480a0b9ab9f3c41523d92b2552eb59cf60f6ea Mon Sep 17 00:00:00 2001
From: Chris Parsons <438676+chrisparsons83@users.noreply.github.com>
Date: Fri, 20 Feb 2026 16:10:22 -0800
Subject: [PATCH] Fix ~/database/context resolving to browser stub during dev
 SSR (#12)
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`resolve.alias` with `isSsrBuild` only works at build time — during
`npm run dev`, `isSsrBuild` is always false, so `ssrLoadModule` was
loading the browser stub (DatabaseContext = null) instead of the real
AsyncLocalStorage implementation, causing a TypeError on every request.

Replace the alias with an `enforce: 'pre'` plugin that checks
`options.ssr` at resolve time, which Vite correctly sets for both dev
SSR module loading and production SSR builds.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 vite.config.ts | 30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/vite.config.ts b/vite.config.ts
index 5855c96..9bda7cd 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -15,20 +15,22 @@ export default defineConfig(({ isSsrBuild }) => ({
         }
       : undefined,
   },
-  resolve: {
-    alias: isSsrBuild
-      ? []
-      : [
-          {
-            find: "~/database/context",
-            replacement: path.resolve(
-              __dirname,
-              "database/context.browser-stub.ts"
-            ),
-          },
-        ],
-  },
-  plugins: [tailwindcss(), reactRouter(), tsconfigPaths()],
+  plugins: [
+    {
+      name: "database-context-alias",
+      enforce: "pre" as const,
+      resolveId(id, _importer, options) {
+        if (id === "~/database/context") {
+          return options?.ssr
+            ? path.resolve(__dirname, "database/context.ts")
+            : path.resolve(__dirname, "database/context.browser-stub.ts");
+        }
+      },
+    },
+    tailwindcss(),
+    reactRouter(),
+    tsconfigPaths(),
+  ],
   server: {
     allowedHosts: true,
   },