[Zope3-Users] Re: schema.List validation does not accept PersistentList

[Alek Kowalczyk]

Leonardo Rochael <leo at ...> writes:

> As it happens, PersistentList is not an instance of "list". Proponents of
> strong dynamically-typed OO would complain that this code is forcing the
> comingling of the "type" concept (a.k.a. interface) into the concept of
> class inheritance [...]
> 
> The solution is for you to define your own schema field for this:
> 
> class PersistentListField(List):
> 
>     _type = PersistentList
> 

Thanks! List should be list, whether it is persistent or not, but it's the
simplest solution...