Hi, Omists! I need help 😉 I have Om component which I consider opaque for my code, but I want its render function to have some custom var bindings. But (binding [...] (om/build OpaqueComponent ...) does not have desired effect, of course, because render is called not inside this form.

@ul: I’m afraid you would have to take OpaqueComponent and pass a new component to om/build which wraps OpaqueComponent’s IRender or IRenderState functions into your binding form

yes, but i'm trying to substitute some global values in OpaqueComponent. I'm using modifed re-frame with Om

and now I need to have ability to use multiple app-db

one way is to pass it directly as parameter

but I want to try first possibility to use binding

the point is to make dispatch calls in component to know that they must use another db

thank for the idea

i first misunderstood it

i will build OpaqueComponent and then wrap its render with specify

@ul yes, I’m looking into om sources, you basically have to override IRender and IRenderState methods with your wrappers

an alternative solution would be to write your own re-frame loop and make dispatch function more flexible

this can be done by not requiring re-frame.core and requiring just other namespaces except router, you would have to copy&paste their loop and make needed changes

i have custom loop and custom om instrument for subscriptions. so its not a problem to pass db to component and to dispatch from component. but I have ambition to not change component code for passing db to dispatch

component just calls dispatch, and which db is used is chosen by wrapper

makes sense, it looks like it is doable with specify!, that is what om uses internally to define various protocol methods when building component

@darwin: if you are interested, i solved the problem with providing custom :descriptor for om/build

@ul: yes, I would like to see a gist of it

here descriptor customization https://github.com/condense/ampere/blob/master/src/ampere/om.cljs#L109

and it is used below in wrapper

@ul: looks good! thanks for sharing, and ampere looks like a cool project, I have one Om project and eventually I would like to switch to re-frame there too

@ul btw. you might want to look at my fork of re-frame, it might be a good fit so ampere does not need to duplicate it

https://github.com/Day8/re-frame/pull/107