also the recommended practice is "don't do that"

@negaduck I believe you shouldn't do that since "Only these things are true" is not really something you find in mathematical logic

I could be wrong though

@escherize, @kauko, could you explain why it’s not a good practice? I can imagine a case when it catches a bug:

(re-frame/reg-event-db
 :set-active-panel
 [check-spec-interceptor]
 (fn [db [_ active-panel]]
   (assoc db :active-panel active-panel)))

In that case, check that it has :active-panel

Or if you do a dissoc, then you have to check that those exact keys are not in the result

Ohh you mean that the key is already in there

My bad, I misunderstood

@kauko, yes, it now has both :active-panel and :actvie-penal

Yeah you're absolutely right I think. I just remember Hickey mentioning in his clojureconf talk that clojure.spec doesn't have that concept, because mathematical logic doesn't. Maybe someone who knows more about maths can explain what the repercussions of such a concept would be

I was initially a bit disappointed by that claim, but when I thought about it more, the only times I could think of when I'd want to do a check like that, was typos

like you said

So if there's a trade off to adding that concept, maybe it's not worth it

If you really want to know, I'm sure there's discussion about this in the google group. 🙂 OR you can just carry on doing what you want 😄

I would like to see that discussion. Anyway, we can have spec for values: (s/def ::active-panel #{:home-panel :about-panel}), why not have a spec for keys? (s/def ::good-state (only-keys :req-un [::active-panel]))

Guys i have a question; I have a project like cms admin panel. How should organize files, like this ? https://github.com/Day8/re-frame/blob/master/docs/Basic-App-Structure.md#larger-apps Or something different structure ?

Anyone have one example project that use re-frame ?

hello i have a silly question but how does one call the server side from reagent?

@gregnwosu using any of a myriad of ajax libraries

cljs-ajax, cljs-http

i’ll take a look now thanks,

so you have to standup a seperate service?

@gregnwosu yes there will need to be some type of service endpoint to hit, what exactly are you trying to do?

just learning the paradigm im hoping to stand up a service that analyses some text

so a user logs in , enters text into a text box and the text is analysed

the analysis should take place on the serverside

so I will need to send the text over ajax to the processing server

and then return the result

got ya, I’ve had success setting up some server side code in a re-frame application using Ring/Compojure, which is pretty simple to set up, I’ll find you the docs I used

the text may take a while to process so it will need to be added to a processing queue

thanks thats awesome

I looked at reframe but i was a bit overloaded , i wanted to get my head around reagent first, which i think i have now, so please hit me with the reframe doc

https://github.com/fasiha/fullstack-cljs-tutorial

This should give you a good idea and I think it is just using reagent

cool , did you have a reframe doc too?

https://github.com/Day8/re-frame/blob/master/docs/Talking-To-Servers.md

thanks 😄

no problem

how would you use the following js lib with re-frame? http://davidshimjs.github.io/qrcodejs/

I'm just not sure how passing in the element works, since it will probably be executed before the markup around it is mounted