Hi everyone!

I have a problem with re-frame

the data on certain db key is being updated correctly, but the subscription doesn't work

(def state->pouch_sub (keyword (str pouchDatabaseName "-sub")))
  (re-frame/reg-sub
    state->pouch_sub
    (fn [db [_ _]]
      (.log js/console (clj->js db) "the whole db")
      ((keyword pouchDatabaseName) db)))

  (let [freshStateData (re-frame/subscribe [state->pouch_sub])]
    (.log js/console @freshStateData "subscription")))

I used pretty much the same subscriptions elsewhere and it works just fine

I need to double check when I'm back at my desk, but I'm fairly sure the db passed into your subscription function is a reagent atom; you need to dereference it within the sub function for it to realize when the app database changes.

i'm dereferencing it right here (.log js/console @freshStateData "subscription")

or should i deref it in sub function?

Right, but that's within your component, not your subscription function.

in reg-sub

Yeah

oh

but my router is dereferences it like this

(defn main-panel []
  (let [active-panel (re-frame/subscribe [::active-panel])]
    [pages/panels @active-panel]))

anyway thanks, I'll try this

For a simple reference, this is one of the super basic subscriptions in one of my apps: (defn app-view "Which view the user is currently looking at." [db _] (reaction (:app/view @db)))

So the whole thing is wrapped in (reaction ...) as well

oh

i just done that @db thing and it returned me that reaction

i'm ahead to wrap it just like it in your code

Looking closer, I use reg-sub-raw though, can't remember why.

what is reaction?

is it in re-frame ns?

it seems like you just reimplemented the whole subscription thing

@melvoloskov perhaps you’d find https://github.com/Day8/re-frame/blob/master/docs/SubscriptionFlow.md useful

wow, i haven't read this

thanks

i somehow skipped that the first time when i'd read the docs

Yes, it is a good one

Heh, the project I pulled that snippet from dates back to re-frame 0.2-ish. I think reg-sub back then worked like reg-sub-raw does now, so I just blindly renamed things while upgrading.

this guy just realized double colon keywords are namespaced. going to rename all of my events and subs 😤