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showing results for - "nestjs class validator"
Deborah
22 Apr 2020
1import {
2  MinLength,
3  MaxLength,
4  IsNotEmpty,
5  ValidateNested,
6  IsDefined,
7  IsNotEmptyObject,
8  IsObject,
9  IsString,
10} from 'class-validator';
11import { Type } from 'class-transformer';
12
13class MultiLanguageDTO {
14  @IsString()
15  @IsNotEmpty()
16  @MinLength(4)
17  @MaxLength(40)
18  en: string;
19
20  @IsString()
21  @IsNotEmpty()
22  @MinLength(4)
23  @MaxLength(40)
24  ar: string;
25}
26
27export class VideoDTO {
28  @IsDefined()
29  @IsNotEmptyObject()
30  @IsObject()
31  @ValidateNested()
32  @Type(() => MultiLanguageDTO)
33  name!: MultiLanguageDTO;
34}
source
Marta
29 Sep 2018
1useContainer(app.select(AppModule), { fallbackOnErrors: true });
2
3@ValidatorConstraint({ name: 'UserExists', async: true })
4@Injectable()
5export class UserExistsRule implements ValidatorConstraintInterface {
6  constructor(private usersRepository: UsersRepository) {}
7
8  async validate(value: number) {
9    try {
10      await this.usersRepository.getOneOrFail(value);
11    } catch (e) {
12      return false;
13    }
14
15    return true;
16  }
17
18  defaultMessage(args: ValidationArguments) {
19    return `User doesn't exist`;
20  }
21}
22
23export function UserExists(validationOptions?: ValidationOptions) {
24  return function (object: any, propertyName: string) {
25    registerDecorator({
26      name: 'UserExists',
27      target: object.constructor,
28      propertyName: propertyName,
29      options: validationOptions,
30      validator: UserExistsRule,
31    });
32  };
33}
34
35
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