refactor(backend): fix nestjs-typed linting errors

Signed-off-by: David Mehren <git@herrmehren.de>

backend/src/revisions/edit.dto.ts

@@ -16,6 +16,8 @@ export class EditDto extends BaseDto {
    * Is `null` if the user is anonymous
    * @example "john.smith"
    */
+  // nestjs-typed does not detect '| null' types as optional
+  // eslint-disable-next-line @darraghor/nestjs-typed/api-property-matches-property-optionality
   @IsString()
   @IsOptional()
   @ApiPropertyOptional()

backend/src/revisions/revision-metadata.dto.ts

@@ -15,6 +15,7 @@ export class RevisionMetadataDto extends BaseDto {
    * ID of this revision
    * @example 13
    */
+  @Type(() => Number)
   @IsNumber()
   @ApiProperty()
   id: Revision['id'];
@@ -41,7 +42,7 @@ export class RevisionMetadataDto extends BaseDto {
    * Does not include anonymous users
    */
   @IsString()
-  @ApiProperty()
+  @ApiProperty({ isArray: true, type: String })
   authorUsernames: string[];
 
   /**
@@ -75,6 +76,6 @@ export class RevisionMetadataDto extends BaseDto {
    */
   @IsArray()
   @IsString({ each: true })
-  @ApiProperty()
+  @ApiProperty({ isArray: true, type: String })
   tags: string[];
 }

backend/src/revisions/revision.dto.ts

@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 import { ApiProperty } from '@nestjs/swagger';
+import { Type } from 'class-transformer';
 import { IsString, ValidateNested } from 'class-validator';
 
 import { EditDto } from './edit.dto';
@@ -28,7 +29,8 @@ export class RevisionDto extends RevisionMetadataDto {
   /**
    * All edit objects which are used in the revision.
    */
-  @ValidateNested()
-  @ApiProperty()
+  @Type(() => EditDto)
+  @ValidateNested({ each: true })
+  @ApiProperty({ isArray: true, type: EditDto })
   edits: EditDto[];
 }