On Friday, September 5, 2014 2:33:27 AM UTC-4, jack james wrote:
> On Thursday, September 4, 2014 9:50:41 PM UTC-5, Tom George wrote:
> > Hi,
> >
> > I'm doing my first real work in clojurescript/om. I have a little web
> > service that queries a database and returns a JSON message of all known
> > schema owners. I want to use this data source to populate a dropdown.
> >
> > The demo page for om-bootstrap is really nice, but in the examples for
> > populating a dropdown, the menu-items are known beforehand, so they just
> > nest a lot of (menu-item) calls. I won't know the size of my dropdown
> > until I hit the database, and I don't want to spell out each individual
> > menu item.... Is there a better way to do this? I was thinking maybe
> > creating a map of number-string pairs, where the keys are menu item keys,
> > and the values are the schema owners. However, I can't think of how I
> > would get around specifying each individual menu item. I tried mapping the
> > menu-item function to no avail.
> >
> > The relevant clojurescript looks like this right now:
> >
> > (ns junk-browser.core
> > (:require-macros [cljs.core.async.macros :refer [go]])
> > (:require [cljs.core.async :refer [>! <! chan close!]]
> > [om.core :as om :include-macros true]
> > [om.dom :as dom :include-macros true]
> > [om-bootstrap.button :as b]
> > [cljs-http.client :as http]))
> >
> >
> > (defn schema-dropdown [app owner]
> > (reify
> > om/IInitState
> > (init-state [_]
> > {:owners []})
> > om/IWillMount
> > (will-mount [_]
> > (go
> > (let [owners (into [] (<! (schema-owners)))] ; (schema-owners)
> > is a cljs-http GET
> > (om/update-state! owner #(assoc % :owners owners)))))
> > om/IRenderState
> > (render-state [ _ state]
> > (dom/div nil
> > (b/dropdown {:title "Schema Owners"}
> > (b/menu-item {:key 1} (nth (:owners state) 0
> > :not-found
> > ...
> > (b/menu-item {:key n} (nth (:owners state) n-1
> > :not-found)))))))
> >
> >
> >
> > Any ideas on how I can tackle this in a better way?
> >
> > Thanks,
> >
> > Tom
>
> I was typing up my answer as Sean was posting his, but I guess it can't hurt
> to post a few more examples...
>
> Warning: I'm also new to Om & ClojureScript so I'm not at all confident that
> these examples are idiomatic.
>
> In each of these, you should be able to use your existing "schema-owners"
> ajax function in place of mine.
>
> Here's an example similar to what you pasted:
> https://www.refheap.com/89834
>
> You're using local state for what really seems to me more like app state.
> Here's an example using app state instead:
> https://www.refheap.com/89835
>
> If your data doesn't have unique keys, you could try something like this:
> https://www.refheap.com/89836
>
> or this:
> https://www.refheap.com/89837
>
>
> That's as far as I've gotten with this stuff. Hope that helps.
Sean and Jack,
Thanks a lot for your responses.
Sean - I like the look of sablono over om.dom, I think I'm going to pick that
up :)
Jack - Your last post on refheap was what I was looking for.. (apply
b/dropdown) and then map menu-item to the stuff I want to bind. Worked like a
charm!
Thanks,
Tom
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