Nexus on Clojure and ClojureScript

вот такие ментальные упражнения в маппинге DSL на SQL запросы просто демотивируют использовать рельсы и джемы https://stackoverflow.com/questions/42288875/constructing-an-activerecord-with-nested-joins-rails-4

А-а-а! "There is a gem for exevrything" rails mantra seems to be true! I've a problem assets precompilation in docker environment, and here is solution! Null DB Active record driver. Awesome! Meet the gem, that solves the problem, which should not exist at all! http://blog.zeit.io/use-a-fake-db-adapter-to-play-nice-with-rails-assets-precompilation/

use cond-> when you need to add optional parameter, like this (let [x 2]   (cond->  {:a 1}   (= x 2)  (assoc :b 2})) result will be {:a 1 :b 2}