Validation Support

[maifeeulasad]

@DataClass()
class User {
  @KeyPath()
  @Validate(v => v.length > 0, 'ID cannot be empty')
  id: string;
  
  @Validate(v => v.includes('@'), 'Invalid email')
  @Index({ unique: true })
  email: string;
  
  @Validate(v => v >= 0 && v <= 150, 'Age must be 0-150')
  age: number;
}