ccfontes

; 1. rename attribute: :url/path → :legacy/url-path-v1
(do (require '[datomic.api :as datomic] '[kanasubs.db :as db])
    (datomic/transact @db/connection
      [{:db/id :url/path, :db/ident :legacy/url-path-v1}]))

; 2. repurpose :url/path
(do (in-ns 'kanasubs.db)
    (transact @connection
      [{:db/id #db/id[:db.part/db]
        :db/ident :url/path

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;; Synchronous Clojure trained us to use Exceptions, while asynchronous JavaScript has trained us to use Promises.
;; In contexts where we work asynchronously in Clojure (in particular ClojureScript), it can be difficult to see a definite way of managing failure. Here are some proposals.

;; OPTION 1: adapting exception handling to core.async CSPs
;; As proposed by David Nolen, with some macro sugar we use Exceptions in go blocks with core async in the same way we would do with synchronous code.

(require '[clojure.core.async :as a :refer [go]])

;; defining some helper macros
(defn throw-err "Throw if is error, will be different in ClojureScript"