Module decorators/IfValid

IfValid

• IfValid(target: string, validationOptions?: ValidationOptions): (object: any, propertyName: string) => void

• The IfValid decorator checks whether the target argument is a valid property before proceeding with the validation of the property decorated.

  Example

  The property checkMe is not valid and so the @IsDefined annotation will not be invoked for the p1 property:

  class IfValidNotTest1 {
     @IsDefined() 
     checkMe: any = null; //Property not valid
  
     @IsDefined() 
     @IfValid("checkMe")
     p1: any = null;
   }
  

  Parameters

  • target: string

    The name of the property that should be valid.

  • Optional validationOptions: ValidationOptions

    The validation options

  Returns (object: any, propertyName: string) => void

  • • (object: any, propertyName: string): void

    • Parameters

      • object: any

      • propertyName: string

      Returns void