add file upload to card create

src/modules/cards/cards.controller.ts

@@ -42,10 +42,8 @@ export class CardsController {
     files: { questionImg: Express.Multer.File[]; answerImg: Express.Multer.File[] },
     @Body() body: UpdateCardDto
   ) {
-    console.log({ body })
-    console.log(files)
     return this.commandBus.execute(
-      new UpdateCardCommand(id, body, req.user.id, files.answerImg[0], files.questionImg[0])
+      new UpdateCardCommand(id, body, req.user.id, files.answerImg?.[0], files.questionImg?.[0])
     )
   }
 

src/modules/cards/dto/create-card.dto.ts

@@ -8,11 +8,11 @@ export class CreateCardDto {
   answer: string
 
   @IsOptional()
-  @Length(3, 500)
+  @Length(0, 0)
   questionImg?: string
 
   @IsOptional()
-  @Length(3, 500)
+  @Length(0, 0)
   answerImg?: string
 
   @IsOptional()

src/modules/cards/use-cases/update-card-use-case.ts

@@ -30,28 +30,42 @@ export class UpdateCardHandler implements ICommandHandler<UpdateCardCommand> {
       throw new BadRequestException(`You can't change a card that you don't own`)
     }
 
-    const addQuestionImagePromise = this.fileUploadService.uploadFile(
-      command.questionImg.buffer,
-      command.questionImg.originalname
-    )
-    const addAnswerImagePromise = this.fileUploadService.uploadFile(
-      command.answerImg.buffer,
-      command.answerImg.originalname
-    )
-
     let questionImg, answerImg
 
     if (command.questionImg && command.answerImg) {
+      const addQuestionImagePromise = this.fileUploadService.uploadFile(
+        command.questionImg?.buffer,
+        command.questionImg?.originalname
+      )
+      const addAnswerImagePromise = this.fileUploadService.uploadFile(
+        command.answerImg?.buffer,
+        command.answerImg?.originalname
+      )
+
       const result = await Promise.all([addQuestionImagePromise, addAnswerImagePromise])
       questionImg = result[0].fileUrl
       answerImg = result[1].fileUrl
     } else if (command.answerImg) {
+      const addAnswerImagePromise = this.fileUploadService.uploadFile(
+        command.answerImg?.buffer,
+        command.answerImg?.originalname
+      )
       const result = await addAnswerImagePromise
       answerImg = result.fileUrl
     } else if (command.questionImg) {
+      const addQuestionImagePromise = this.fileUploadService.uploadFile(
+        command.questionImg?.buffer,
+        command.questionImg?.originalname
+      )
       const result = await addQuestionImagePromise
       questionImg = result.fileUrl
     }
+    if (command.card.questionImg === '') {
+      questionImg = null
+    }
+    if (command.card.answerImg === '') {
+      answerImg = null
+    }
     return await this.cardsRepository.updateCardById(command.cardId, {
       ...command.card,
       answerImg,