Re: Magritte validations may weaken domain model

On 2 April 2010 22:10, Francois Stephany <tulipe.moutarde(a)gmail.com> wrote: What this means is that it might be better to put the validation directly into your model. MyModel>>isValid ^ some complicated condition Generally there is a trade-off between putting the domain validation into the model or into the meta-model (as with about anything that can be part of the meta-model). If you put it into the model it is closer to the data and behavior and might be easier for people not accustomed to meta-models; if you put it into the meta-model it is more generic and can potentially be reused and extended for different models. Sort of as a workaround you can call the meta-model to do the validation from the model. Something like: MyModel>>isValid ^ self description isSatisfiedBy: self Lukas -- Lukas Renggli www.lukas-renggli.ch