reaction is a macro that expands to evaluating the passed forms (here: 'v') within a function (make-reaction). I don't know the internals of Reagent but my guess is that Reagent has to figure out which ratoms were used in that function call. This is done somehow (by maybe some context setting etc) but it's not too important to know.
What matters is: In your case the v is evaluated before (by the "let") so nothing is noticed by (reaction). On Friday, April 3, 2015 at 3:21:02 PM UTC-4, Colin Yates wrote: > I know I am going insane: > > (register-sub > :add-patient/selected-journey-details-field > (fn [db] > (reaction (-> [:add-patient/local] > subscribe > deref :selected-journey-details-field)) > > #_(let [v (-> [:add-patient/local] > subscribe > deref :selected-journey-details-field)] > (reaction v)))) > > works but > > (register-sub > :add-patient/selected-journey-details-field > (fn [db] > #_(reaction (-> [:add-patient/local] > subscribe > deref :selected-journey-details-field)) > > (let [v (-> [:add-patient/local] > subscribe > deref :selected-journey-details-field)] > (reaction v)))) > > doesn't. And by 'not working' I mean the component doesn't notice any changes > to a subscription to :add-patient/selected-journey-details-field. > > After 4 hours banging my head I reduced it to the above, literally commenting > one and uncommenting the other (with a browser refresh in-between). > > Any suggestions? -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups "ClojureScript" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojurescript+unsubscr...@googlegroups.com. To post to this group, send email to clojurescript@googlegroups.com. Visit this group at http://groups.google.com/group/clojurescript.
