I'm having difficulty getting a http request working as a co-effect. Any hints/examples anywhere? Or is the current way to trigger the dispatch in a callback?

@lsenjov you might be interested in https://github.com/Day8/re-frame-http-fx which packages it up for you

I saw that, but that's the effect afterwards, not the co-effect of getting the data in the first place

Unless I'm missing something?

A coeffect is about "assembling" data so that an event handler can compute how an event will change the world

So coeffects are a representation of the world as it is now - the moment the event happened.

They are about obtaining sufficient information from the world, so the event handler can do its computations

When you do an HTTP GET, that is an effect.

It probably arises from the user hitting a button or something

The event handler, on getting the event "user hit button" will want to initiate the HTTP GET ... that's the effect of the event

@lsenjov ^^^

Summary: you don't do HTTP GETs in coeffects. They happen in effects.

Cool, thanks heaps for explaining

I can see the confusion. What’s the difference between local storage state in a coeffect and database state in an effect besides locality