On Friday, June 17, 2016 at 2:46:37 PM UTC-5, Brian Platz wrote:
>
>
> I'd like to be able to use clojure.spec for input validation where the 
> specs are stored in a database using a data structure to represent them.
>

Why don't you represent them as code loaded by different applications? 
s/form is designed to give you a wire-portable definition of a spec.
 

> s/keys and its requirement to use the registry makes this challenging.
>
> I'm able to generate specs dynamically using a workaround like:
> (eval (cons 's/and <predicates>))
>
> However, I don't see a way of utilizing s/keys in this manner, as the 
> keys must first be placed in the registry.
>
> I could register each key also using eval and s/def similarly to my 
> example above, however that would eliminate this method's use in a 
> multi-tenant environment where one client/instance may have a different 
> spec than another.
>
> The following ideas could make this much simpler:
> - Allow s/keys to accept a spec to use with each key (i.e. the same 
> format used by s/or).
>

The independence of attribute specs is a fundamental tenet of spec and this 
will not be changed.
 

> - Allow a *spec-registry* binding, enabling the use of multiple registries
>

The notion of multiple registries is something that's been raised, but Rich 
will have to be the one to comment on that.
 

>
> Any other ideas or anything I've missed that would make this use case more 
> feasible?
>

There might be a function version of s/keys in the future that can take a 
vector of keys.

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