You have the right idea. I believe the mistake in your code is that
om/build is being called outside of render (or a function called by
render). If you change your code to something like the following, it should
work:
(defn default-view [app owner opts]
(om/component (dom/h1 nil "Default View")))
(defn root-app [app] (om/component (om/build (:view app) app)))
(def app-state (atom {:view default-view}))
(om/root app-state root-app (aget (.getElementsByClassName js/document
"main") 0))
On 16 November 2014 08:08, David Mohl <[email protected]> wrote:
> Hey Guys,
>
> I am very fresh to clojurescript and love it so far. I am in fact
> currently trying to build my first webapp using clojure and compojure for
> the backend, and om combined with secretary for the frontend, but I have a
> lot of issues.
>
> While I slowly get a grasp of om, I am trying to 'switch' pages (or
> views?) to give that feel of a responsive single-page app. To implement
> this, I 'thought' I could simply create a root-app which mounts my other
> views when I need them. Something like this:
>
> (defn default-view [app owner opts]
> (om/component (dom/h1 nil "Default View")))
>
> (defn root-app [app] (om/component (:view app)))
> (def app-state (atom {:view (om/build default-view root-app)}))
> (om/root app-state root-app (aget (.getElementsByClassName js/document
> "main") 0))
>
> Very simple. The root app gets mounted into the main div, and the root app
> mounts whatever is under :view inside the app-state. Works fine so far.
>
> I am access detail/1/, om mounts my detailview, the detailview mounts all
> the components that it needs, one of them loading ajax. Now here comes my
> problem, I am trying to use om/transact to change state. Something like:
>
> om/IInitState
> (init-state [_] (om/transact! app [:data] (fn [] [])))
>
> om/IWillMount
> (will-mount [_] (go (let [foo (<! (fetch-something))]
> (om/update! app #(assoc % :data foo)))))
>
> (I learned that from a example. (fetch-something) is doing a simple ajax
> call through core.async.)
>
> Now when executing I am getting: "No protocol method ITransact.-transact!
> defined for type function: function root_app(app){if(typeof
> picky.core.t16273 !== 'undefined'). "
>
> This error tells me that ITransact is not implemented in my root_app which
> I used for building all the other components. So I must have done something
> wrong or the approach of using a root_app to mount everything else is
> simply not working.
>
> Anyone here who can point me into the right direction? Would appreciate
> any help
>
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