Forgot to mention, I tried the (get-else) but it raises an error about cardinality many not supported, so I guessed it doesn't works here...
--- Wilker Lúcio http://about.me/wilkerlucio/bio Woboinc Consultant +55 81 82556600 On Thu, Sep 18, 2014 at 7:41 PM, Wilker <wilkerlu...@gmail.com> wrote: > Hi > > I'm trying to figure if I can make some parts of my query results to be > optional, for example, given the following query: > > [:find ?name ?age > :where > [?m :person/name ?name] > [?m :person/age ?age]] > > This will return all entities that has a :person/name and :person/age. Ok, > so, if I want to make the name mandatory and the age optional, I can do: > > [:find ?name ?age > :in $ > :where > [?m :person/name ?name] > [(get-else $ ?m :person/age 0) ?age]] > > Ok, so, for single values that works great, but what about this: > > [:find ?m ?name (vec ?url) > :in $ > :where > [?m :person/name ?name] > [?m :photos ?p] > [?p :file/url ?url]] > > On the previous query, it fetch every person that has at least 1 photo, > but not those that has no photos. > > How do I make to the query to return all entities that has name, having > photos or not (ideally the value would be a blank list for those without > photos)? > > Best regards. > --- > Wilker Lúcio > http://about.me/wilkerlucio/bio > Woboinc Consultant > +55 81 82556600 > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
