It just isn't a good idea. They are two separate state management mechanisms. You are bound to get burned eventually and it won't be pretty. It may also be disallowed completely in the future.
David On Wed, Sep 3, 2014 at 8:59 AM, Daniel Kersten <[email protected]> wrote: > David, can you give more details why? Is it because what it points to may > become invalid if the app-state changes? > > I'd have to dig up code where I've actually done it, I can't think of any > offhand but I'm sure I have and haven't had any issues, but I can understand > why it might be a bad idea! > > How do you deref the cursor during render phase? (om/value some-cursor) ? > > > On 3 September 2014 13:01, David Nolen <[email protected]> wrote: >> >> Putting cursors into state is not a good idea. >> >> >> On Wednesday, September 3, 2014, Daniel Kersten <[email protected]> >> wrote: >>> >>> >>> On 3 Sep 2014 06:51, "Alan Shaw" <[email protected]> wrote: >>> > >>> > PS My confusion is increased by the fact that if I print out next-props >>> > from within will-receive-props, it appears on the console to be a plain >>> > vector, but in the next line of code, where I use it in om/set-state!, it >>> > is >>> > in fact a cursor. >>> >>> Is this a problem? I often do (om/set-state! owner :foo some-cursor) >>> >>> Can you explain some more what problem you are encountering? >>> >>> > >>> > >>> > On Tue, Sep 2, 2014 at 10:45 PM, Alan Shaw <[email protected]> wrote: >>> >> >>> >> My main app cursor has a field :circles which is a vector. My animator >>> >> component's render-state method needs these circles transformed into >>> >> animations. This is done by a function make-animations. The parent >>> >> component >>> >> invokes om/build on the animator, passing (:circles cursor) as the >>> >> animator's cursor. >>> >> >>> >> I find that whenever I try to invoke the function on :circles, it is a >>> >> cursor >>> >> and may not be dereferenced. This is true at all the places I have >>> >> tried it: >>> >> 1. in a :fn passed by the parent component as a member of the map in >>> >> om/build, >>> >> along with (:circles cursor). >>> >> 2. within the animator's render-state itself, >>> >> and >>> >> 3. in the animator's will-receive-props method. It is here that the >>> >> docs claim "This is a good place to detect app state changes and make >>> >> updates to local component state using om/set-state! or >>> >> om/update-state!." >>> >> >>> >> My question is: how? >>> >> >>> >> Shanti, >>> >> >>> >> Alan >>> > >>> > >>> > -- >>> > Note that posts from new members are moderated - please be patient with >>> > your first post. >>> > --- >>> > You received this message because you are subscribed to the Google >>> > Groups "ClojureScript" group. >>> > To unsubscribe from this group and stop receiving emails from it, send >>> > an email to [email protected]. >>> > To post to this group, send email to [email protected]. >>> > Visit this group at http://groups.google.com/group/clojurescript. >>> >>> -- >>> Note that posts from new members are moderated - please be patient with >>> your first post. >>> --- >>> You received this message because you are subscribed to the Google Groups >>> "ClojureScript" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at http://groups.google.com/group/clojurescript. >> >> -- >> Note that posts from new members are moderated - please be patient with >> your first post. >> --- >> You received this message because you are subscribed to the Google Groups >> "ClojureScript" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/clojurescript. > > > -- > Note that posts from new members are moderated - please be patient with your > first post. > --- > You received this message because you are subscribed to the Google Groups > "ClojureScript" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/clojurescript. -- Note that posts from new members are moderated - please be patient with your first post. --- You received this message because you are subscribed to the Google Groups "ClojureScript" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/clojurescript.
