I moved my comments to a thread since I didn’t mean to spam this man channel - Sorry if that was confusing.

If anyone knows how to force a component with local state to reload from scratch, it might save me a bunch of time. any takers?

(defn text-area [{:keys [path default-value id] :as props}]
  (let [value (r/atom (if default-value default-value ""))]
    (r/create-class 
      {:display-name "text-area"
       :component-did-mount
       (fn text-area-did-mount [this]
         (js/autosize (r/dom-node this)))
       :reagent-render
       (fn text-area-render [{:keys [path default-value id] :as props}]
         [:textarea.form-control.autosizing
          (merge (dissoc props :path) 
                 (addid 
                   id 
                   {:value       @value
                    :on-change   #(reset! value (-> % .-target .-value))
                    :on-blur #(rf/dispatch [:update-value path @value])}))])})))

Seems there is no way to change the state inside a component from outside. So... will try another way. cheers 🍺

I did get it to work by hiding the component, then enabling it later, but that was pretty hacky

On mobile so can’t get the full context from the code, but a hack is to change the ^{:key for a component to force it to be created

re-frame-trace 0.1.16 is out https://github.com/Day8/re-frame-trace/releases/tag/0.1.16. Now with React 16 and Reagent 0.8.0 support

@danielcompton thanks, it removed the React.createClass is deprecated and will be removed in version 16 warning from my console

I upgraded reagent to 0.8.0-alpha2 as well, and everything is working fine.

@danielcompton I just upgraded re-frame-trace on a project where I’m using [garden "2.0.0-alpha1"]. It seems that my version of garden takes presidence, but it’s API is not compatible. Do you know of a quick-fix?

Invalid :refer, var garden.compiler/render-css does not exist

It doesn’t seem like the correct behavior by ClojureScript. Versions are pinned, so both should be running side-by-side

just wrapping my head around the undo fx: if a dependency of my project also uses undo and it mutates the config with custom harvesters, those configurations leak into the parent app, right? https://github.com/Day8/re-frame-undo

Hi! I'm trying to figure out how a subscription in re-frame works. Maybe some can help me? I've always believed that calling (subscribe [:something]) returned something which is exactly the same as a reagent reaction. However, I when I deref a subscribe in a reagent run! macro, the body isn't rerun when the subscribed data changes...

This does work however when I replace subscribe with a reaction. For example (reaction (::db/cart @re.frame.db/app-db)). I cannot figure out why this is different...

Hello, I’m trying to learn re-frame to upgrade my cljs apps. Are there any resources/tutorials/books out there that may help me?

@stex subscribe does return a reagent reaction. The reaction is created when you call reg-sub. See here: https://github.com/Day8/re-frame/blob/master/src/re_frame/subs.cljc#L327

@kenny Thanks! The puzzeling thing is that a subscribe doesn't work in a run! macro, which is essentially just a reaction which auto-runs.

See: https://github.com/reagent-project/reagent/blob/master/src/reagent/ratom.clj#L9

@hkjels https://clojurians.slack.com/archives/C073DKH9P/p1516959476000169 You can only run one version of a library at a time, Leiningen/Boot will only pick one if there are multiple different versions required

hi gang ... hoping someone could point me to a tutorial on file downloads (alternately, tell me that I'm fundamentally misconceiving this problem):

I have client-side state that I want to render as an Excel file, and js-xlsx isn't going to cut it, so I'm wanting to use docjure.

which is server-side Java.

my current experiment, summarized: user hits "download as excel" button. This dispatches a please-download event. Event is caught by fx handler.

fx handler sets a "downloading" flag in app-db for UI feedback, and dispatches an http-xhrio POST with the browser-side data from the app-db.

a ring handler picks up the POST data, does what it needs to do to make up an Excel file, and ...

so here's where I go off the rails. I've tested giving back a text file in the xhrio success handler with the Content-Disposition header set to attachment but that's almost certainly not what I want and I've run smack into the joy that is dealing with file writes in a browser.

so I can log the text file contents (ie. cljs-ajax is receiving OK) in the re-frame event handler, but I'm scratching my head a bit on the right thing to google here.

@rgm what exactly is the problem? i.e. what do you want to happen that isn't happening here?

Sounds like you're wanting to trigger the browsers file download mechanism?

the browser should save a file to ~/Downloads ... exactly

Experience suggests I'm off the track here given there's no obvious re-frame doc to read.

Ignoring re-frame for a second, how would you do this with JS or CLJS?

probably just do a straight-up form POST and have the server use Content-Disposition in the response to trigger a download.

wait ... that can't possibly work here can i... dang. I think that might.

oh for the love of. Yep.

that'll work, at which point re-frame's job is really just to keep a hidden input's value in sync with the app db.

so yeah, assuming the /xlsx endpoint sends down a Content-Disposition: attachment; filename="testfile.txt" this invokes a download

so now I'm thinking how to gracefully deal with a 500.

since that would dump the browser's re-frame state entirely

Does an XHR POST have the same effect?

I'm .... not sure, tbh.

you mean outside re-frame again or by arranging the xhrio effect?

yeah

outside of re-frame

just thinking how to arrange that experiment ... on-click with js interop?

re-frame's role with fx is around translating stateful actions into data descriptions

Doing it with cljs-ajax directly in the event handler instead of emitting the effect

trying that.

seems like that goes to supplying the right map to :response-format

so that'll log server-supplied text correctly, at least.

Content-Disposition seems not to have an effect, which also (kind of?) makes sense to me.

eh, blerg. I've got to run to a meeting.

Greatly appreciate the help @danielcompton ... I think the short version is that I was on the wrong path and overthinking it.