How to add extra validation on hook

[ghost]

Is it possible to add extra validation inside a hook? i.e.:

      beforeSave: function (Entity) {
         if (Entity.someValue > 10000) {
            throw new Exception("someValue is wrong"); 
         }
      }

I've also tried to return a rejected Promise, as the docs says, but I can't prevent saving.

[paveltiunov]

@IGZgustavomarin you can add ValidationError dependency and throw it as follows: throw new ValidationError({field: "field error message"})