return properly actual file name

src/Workshop/workshop.schema.ts

@@ -7,12 +7,14 @@ import {
 } from '@smatch-corp/nestjs-pothos';
 import { Builder } from '../Graphql/graphql.builder';
 import { PrismaService } from '../Prisma/prisma.service';
+import { MinioService } from 'src/Minio/minio.service';
 
 @Injectable()
 export class WorkshopSchema extends PothosSchema {
   constructor(
     @Inject(SchemaBuilderToken) private readonly builder: Builder,
     private readonly prisma: PrismaService,
+    private readonly minioService: MinioService,
   ) {
     super();
   }
@@ -44,8 +46,18 @@ export class WorkshopSchema extends PothosSchema {
         imageFileId: t.exposeID('imageFileId', {
           description: 'The ID of the image file for the workshop.',
         }),
-        imageFileUrl: t.exposeString('imageFileUrl', {
+        imageFileUrl: t.string({
           description: 'The URL of the image file for the workshop.',
+          resolve: async (workshop, args, ctx) => {
+            const fileUrl = await this.minioService.getFileUrl(
+              workshop.imageFileId ?? '',
+              'workshops',
+            );
+            if (!fileUrl) {
+              throw new Error('Cannot retrieve file url');
+            }
+            return fileUrl;
+          },
         }),
         date: t.expose('date', {
           type: 'DateTime',