From ff18ecffd3d122e401456f6cc16aeb709e86848d Mon Sep 17 00:00:00 2001
From: Ryoya <33255443+harunari0928@users.noreply.github.com>
Date: Fri, 11 Oct 2024 04:53:51 +0900
Subject: [PATCH] fix(nuxt): fix nested page types in `typedPages` (#29352)

---
 packages/nuxt/src/pages/module.ts               |  7 ++++++-
 test/fixtures/basic-types/pages/param/index.vue | 12 ++++++++++++
 test/fixtures/basic-types/types.ts              |  4 ++++
 3 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 test/fixtures/basic-types/pages/param/index.vue

diff --git a/packages/nuxt/src/pages/module.ts b/packages/nuxt/src/pages/module.ts
index 12db0ebb7e..2832599d46 100644
--- a/packages/nuxt/src/pages/module.ts
+++ b/packages/nuxt/src/pages/module.ts
@@ -165,10 +165,15 @@ export default defineNuxtModule({
           if (nuxt.apps.default) {
             nuxt.apps.default.pages = pages
           }
+          const addedPagePaths = new Set<string>()
           function addPage (parent: EditableTreeNode, page: NuxtPage) {
+            // Avoid duplicate keys in the generated RouteNamedMap type
+            const absolutePagePath = joinURL(parent.path, page.path)
+
             // @ts-expect-error TODO: either fix types upstream or figure out another
             // way to add a route without a file, which must be possible
-            const route = parent.insert(page.path, page.file)
+            const route = addedPagePaths.has(absolutePagePath) ? parent : parent.insert(page.path, page.file)
+            addedPagePaths.add(absolutePagePath)
             if (page.meta) {
               route.addToMeta(page.meta)
             }
diff --git a/test/fixtures/basic-types/pages/param/index.vue b/test/fixtures/basic-types/pages/param/index.vue
new file mode 100644
index 0000000000..82dddbe38d
--- /dev/null
+++ b/test/fixtures/basic-types/pages/param/index.vue
@@ -0,0 +1,12 @@
+<script setup lang="ts">
+definePageMeta({
+  name: 'param2',
+  alias: ['/param-other'],
+})
+</script>
+
+<template>
+  <div>
+    <!--  -->
+  </div>
+</template>
diff --git a/test/fixtures/basic-types/types.ts b/test/fixtures/basic-types/types.ts
index d6f519e4bd..5a60251e0d 100644
--- a/test/fixtures/basic-types/types.ts
+++ b/test/fixtures/basic-types/types.ts
@@ -162,6 +162,10 @@ describe('typed router integration', () => {
     // @ts-expect-error this is an invalid param
     router.push({ name: 'param-id', params: { bob: 23 } })
     router.push({ name: 'param-id', params: { id: 4 } })
+    // @ts-expect-error this is an invalid route
+    router.push({ name: 'param' })
+    // @ts-expect-error this is an invalid route
+    router.push({ name: '/param' })
   })
 
   it('correctly reads custom names typed in `definePageMeta`', () => {