fix very strange casting issue

I forgot to add the single object type and for some reason it didn't error and instead had silently cast the result?

package.json

@@ -22,7 +22,7 @@
 		"@types/cors": "^2.8.17",
 		"@types/express": "^5.0.0",
 		"@types/multer": "^1.4.12",
-		"@types/node": "^22.7.8",
+		"@types/node": "^22.7.9",
 		"@types/response-time": "^2.3.8",
 		"@types/statuses": "^2.0.5",
 		"@types/swagger-ui-express": "^4.1.6",

src/v2/controller/post.controller.ts

@@ -113,18 +113,21 @@ export class PostController extends Controller {
 	/**
 	 * Updates the post to the given ID
 	 * @param id Post ID
-	 * @param postToCreate Post information
+	 * @param postToUpdate Post information
 	 */
 	@Response<BadRequestError>(400)
 	@Response<PermissionError>(403)
 	@Security("discord", ["administrator"])
 	@Put("{id}")
 	public updatePost(
 		@Path() id: number,
-		@Body() postToCreate: CreateWebsitePost,
+		@Body() postToUpdate: CreateWebsitePost,
 	): Promise<WebsitePost> {
-		postToCreate.description = this.sanitizeDescription(postToCreate.description);
-		return this.service.update(id, postToCreate);
+		postToUpdate.description = this.sanitizeDescription(postToUpdate.description);
+
+		console.log(JSON.stringify(postToUpdate.changelog, null, 4));
+
+		return this.service.update(id, postToUpdate);
 	}
 
 	/**

src/v2/interfaces/posts.ts

@@ -7,7 +7,7 @@ export interface PostDownload {
 
 export interface PostChangelog {
 	// recursive type (arbitrary nesting possible as long as it terminates with strings somewhere)
-	[category: string]: (string | PostChangelog)[];
+	[category: string]: PostChangelog | (string | PostChangelog)[];
 }
 
 export interface CreateWebsitePost {

src/v2/repository/posts.repository.ts

@@ -21,16 +21,15 @@ export default class PostFirestormRepository implements WebsitePostRepository {
 		return posts.get(id);
 	}
 
-	getByPermalink(permalink: string): Promise<WebsitePost> {
-		return posts
-			.search([
-				{
-					criteria: "==",
-					field: "permalink",
-					value: permalink,
-				},
-			])
-			.then((results) => results[0]);
+	async getByPermalink(permalink: string): Promise<WebsitePost> {
+		const results = await posts.search([
+			{
+				criteria: "==",
+				field: "permalink",
+				value: permalink,
+			},
+		]);
+		return results[0];
 	}
 
 	create(postToCreate: CreateWebsitePost): Promise<WebsitePost> {
@@ -41,8 +40,8 @@ export default class PostFirestormRepository implements WebsitePostRepository {
 	update(id: number, post: CreateWebsitePost): Promise<WebsitePost> {
 		const postWithId = {
 			...post,
+			[ID_FIELD]: String(id),
 		};
-		postWithId[ID_FIELD] = String(id);
 		return posts.set(id, postWithId).then(() => posts.get(id));
 	}