Are subscriptions memoized / optimized based on their parameters?

I.E. say I have 2 components, component-a and component-b

component-a has:

(let [some-db-value @(subscribe [::subs/generic-subscription :foo])]
  ...)

and component-b has: (note the only difference is the param to the subscription)

(let [some-db-value @(subscribe [::subs/generic-subscription :bar])]
  ...)

Because they share a subscription, is a change to either sub going to cause a re-render for both? Or only for components that use the same sub, and the same sub params?

@samueldev you could put a println or similar in the ::subs/generic-subscription to find out probably

haha youre right @mikerod , will be trivial for me to find out myself, i only just stepped out and im on the bus right now 😛 i pondered it as i left my pc and thought id ask. will try in a bit!

However, the subscription is cached on the whole query vec

So the cache key used for subscribe is [::subs/generic-subscription :bar] and [::subs/generic-subscription :foo]

oh, your question was a bit different

you were asking if both would be re-rendered due to being reactive to the same underlying registered subscription

So I believe to answer that, each deref will register separate watchers on the underlying reaction

If the change to the subscription input signals does not cause a change in value from one of the deref, then I do not believe there will be any re-render triggered - because no watchers of the reaction (underlying the subscription) are triggered on a no change event

@twashing in case you’re still looking into that problem with OPTIONS, you’re probably looking at CORS preflight requests. Your http server should be set up to handle CORS. Alternatively you can serve the frontend code from the exact same server (ip and port) as the /my/endpooint, though in my experience setting up CORS is less hassle down the road.

I'm using re-frame with draftjs, but it seems to be a problem:

(let [editor-state          (reagent/atom (raw-content->editor-state-or-empty
                                             @(re-frame/subscribe [:some-key])))
        static-toolbar-plugin (create-toolbar-plugin)
        toolbar               (.-Toolbar static-toolbar-plugin)]
    [:div.he-text-editor
     [:> editor {:editorState @editor-state
                 :onChange    #(println %)
                 :plugins     [static-toolbar-plugin]}]
     [:> toolbar]])

any ideas how to solve this?

@kurt-o-sys I didn't really understand your explanation but looking at the code ... you are using a ratom .... so my guess is you should be using a Form-2 component

Hello. Has anyone used a react template with re-frame? Is that something that is easy to integrate with? Total newb with front-end.