#3 added checker to get albums by artistId/albumId or all albums

src/services/albumsService.ts

@@ -9,9 +9,14 @@ export class AlbumsService {
 
     public getAlbums = async(req: Request): Promise<IResponse<IAlbum[] | null>> => {
         try {
-            const data =  req.query.artist ? 
-            await Album.find({artist: req.query.artist}).populate('artist') : 
-            await Album.find().populate('artist')
+            let data
+            if (req.query.artist){
+                data = await Album.find({artist: req.query.artist}).populate('artist')
+            } else if (req.query.album){
+                data = await Album.find({_id: req.query.album}).populate('artist')
+            } else{
+                data = await Album.find().populate('artist')
+            }
             const response: IResponse<IAlbum[]> = {
                 status: EStatuses.SUCCESS,
                 result: data,