Clojurians Log v2

I have a situation where I have a relationship in one of my models in mr frontend fulcro db with a 1 to 1 relation ship with another model, something like

{:person/id 3
  ...
  person/pet [pet/id 5]}

Three is the intentional design because it is performant, simple, and trivial to implement

You can implement reverse lookups by creating indexes, which is how datomic does it. There is nothing in fulcro that does that for you

There are plenty of places where could hook in such a thing, probably as a custom transaction processing plugin based on the included one

Would make the most sense

Good Morning all, If I do this:

(ns app.myns
  (:require
    [com.fulcrologic.fulcro.dom :as dom]
    [clojure.pprint :refer [pprint]]))

(pprint (div :.ur.blah))

#js {"$$typeof" #object[Symbol(react.element)], :type "div", :key nil, :ref nil, :props #js {:className "ur blah"}, :_owner nil, :_store #js {}}

It’ll help you to watch these videos to understand what dom/div is doing https://www.youtube.com/playlist?list=PLVi9lDx-4C_TBRiHfjnjXaK2J3BIUDPnf

@donavan, the mystery I am trying to solve is how the dev declaration converts to a function in the source. Its in this namespace: https://github.com/fulcrologic/fulcro/blob/develop/src/main/com/fulcrologic/fulcro/dom.cljs

There is both a macro div and function div . Is that what you’re talking about?

Possibly, but in the source, you simply (dev :.ui.main), where is the div declared as a function or macro looking at the fulcro.dom source. Sorry, I am pretty new to Clojure and trying to figure out how things work.

This is probably more of just Clojure question.

right, i think what’s confusing you is it’s generated in a macro

There is also https://github.com/fulcrologic/fulcro/blob/develop/src/main/com/fulcrologic/fulcro/dom.clj

This creates the macro version https://github.com/fulcrologic/fulcro/blob/develop/src/main/com/fulcrologic/fulcro/dom.clj#L220

And this creates the client side js function version https://github.com/fulcrologic/fulcro/blob/develop/src/main/com/fulcrologic/fulcro/dom.clj#L240

If you’re not so sure about what a macro is then, yes, it’s a clojure question 🙂

I would watch the videos I posted above… as far as I remember Tony touched on this stuff

OK, so basically all of the declared values in dom.cljs are converted to functions using the macros. Therefore, all of these functions will have the same arguments.

Yeah, they all behave very similarly

The macros create the functions at compile time

…well the one macro creates the macro versions and the other macro creates the function versions

Actually, I am not far enough into it to understand the videos. I am working up to it. Trying to understand some basic things. Also, I tend to learn much better after I dig into coded and understand it.

Yeah, I wouldn’t worry about all this macro stuff… just use them, there’s a lot to learn before worrying about how the dom macros/functions are created

Any way, good luck. I’m off for supper

Yeh, I am beginning to see how Tony layers the macros. Thats crazy, he is super smart.

Thank you and enjoy supper.