fix: tag pages.

Author: missionmike

src/content/posts/seo/getting-google-my-business-cid-codes-quickly.mdx

@@ -1,7 +1,7 @@
 ---
 title: 'Getting Google My Business CID Codes, Quickly.'
 date: '2021-03-06'
-tags: ['SEO']
+tags: ['SEO', 'JavaScript']
 draft: false
 featuredImage: blog/seo-google-cid-script-executed.webp
 summary:

src/content/posts/wordpress/scrape-and-debug-a-wordpress-plugin.mdx

@@ -1,7 +1,7 @@
 ---
 title: 'Scrape & Debug: A WordPress Plugin'
 date: '2020-08-02'
-tags: ['WordPress']
+tags: ['WordPress', 'JavaScript', 'Legacy', 'SEO']
 draft: false
 featuredImage: blog/wordpress-scrape-and-debug.webp
 summary:

src/pages/blog/tag/[tag].astro

@@ -6,17 +6,23 @@ import type { CollectionEntry } from 'astro:content';
 
 export async function getStaticPaths() {
   const posts = await getCollection('posts');
+
   const tags = new Set<string>(
-    posts.flatMap((post: CollectionEntry<'posts'>) => post.data.tags || [])
+    posts.flatMap((post: CollectionEntry<'posts'>) =>
+      (post.data.tags || []).map((t: string) => t.toLowerCase())
+    )
   );
 
   return Array.from(tags).map((tag) => ({
     params: { tag: tag.toLowerCase() },
     props: {
       tag: tag.toLowerCase(),
-      posts: posts.filter((post: CollectionEntry<'posts'>) =>
-        post.data.tags?.map((t: string) => t.toLowerCase()).includes(tag.toLowerCase())
-      ) as CollectionEntry<'posts'>[],
+      posts: posts.filter((post: CollectionEntry<'posts'>) => {
+        const postTags = (post.data.tags || []).map((t: string) => t.toLowerCase());
+        const match = postTags.includes(tag.toLowerCase());
+
+        return match;
+      }) as CollectionEntry<'posts'>[],
     },
   }));
 }