Clojurians Log v2

It helps a lot if [:_id] is not just a path in the db, but a rather complicated subscription which is not easy to replicate as a function from db

It looks like you’re using some js components and it’s hard to tell how exactly they treat the values you pass inside them.

From what you saying, it looks like the subscriptions are working fine.

(def db {:form {:entity-id 1}
         ...})

(reg-sub
  ::get-some-entity
  :<- [:a lot]
  :<- [:of]
  :<- [:signals]
  (fn [[yada yada yada] [_ entity-id]]
    (some (really (complicated code))))

(reg-sub
  ::get-entity-from-form
  (fn [db [_ form-path]]
     ???????)

(defn my-form []
  (let [form-path :form
        entity @(re-frame/subscrible [::get-entity-from-form form-path])]
    [render-entity entity]))

I'm pretty sure you can safely use @(subscribe ...) within the reg-sub handler. Alternatively, use reg-sub-raw.

Is there a way to check if a subscription is already registered given a query-id?

I figure I could use the re-frame.registrar namespace functionality, but that feels like relying on internal api too much

It is internal. But I don't think there's any other way.