Clojurians Log v2

is there a way to query for all types but one?

@talgiat the main problem I’d see with doing something like that is that the query may become a performance problem

It would be heavily hit since it’s working memory will change any time any fact in working memory is inserted/retracted (including from truth maintenance)

You could probably do what you ask though:

(r/defquery []
  [?o <- Object]
  [:test (not (isa? (type ?o) ExcludedType))])

If you have a custom :fact-type-fn you could still accomplish similar

I do have a :fact-type-fn

@talgiat you’d have to define an hierarchy then more than likely

See http://www.clara-rules.org/docs/fact_type_customization/

Potentially you could derive all your types to a common ancestor type.

You could leave out the excluded type from that grouping too, and then your query would just be r/defquery my-q [] [?x <- :parent-type]

yeah, thought about that

prob. better with records implementing a common protocol that will be the parent

@talgiat it can go either way really