CODEWITHSUNDEEP
typescriptnestjsdtoclass-validator
Vitor Morais
Vitor Morais

Reputation: 13

How can I validate with Nesjs a DTO as number and not empty?

I'm trying to validate a request using DTO. I need to validate if value is a number and not empty.

When I try to use only the decorator IsNumber() and pass a body with a empty property, validation fails. So, I tried to include the decorator IsNotEmpty() too, but this is not working apparently, because if I pass a empty property, the flow follows. My code is something like this:

export class CreateOrderShippingDto implements CreateOrderShippingDtoInterface {
  @ApiProperty({
    type: Number,
  })
  @IsNotEmpty()
  @IsNumber()
  readonly orderId: number;
}

Someone can help?

Upvotes: 1

Views: 6525

Answers (1)

Baboo
Baboo

Reputation: 4278

IsNotEmpty is a validator for string. From the doc:

Checks if given value is not empty (!== '', !== null, !== undefined).

Use IsDefined instead to check if the value is set:

export class CreateOrderShippingDto implements CreateOrderShippingDtoInterface {
  @ApiProperty({
    type: Number,
  })
  @IsDefined()
  @IsNumber()
  readonly orderId: number;
}

As a side note, IsDefined ignores the skipMissingProperties property from the configuration so this is a safe way to enforce a value to be set.

Upvotes: 1

Related Questions