Wrapping Datascript query in a function?

Fri, 29 May 2020 20:05:20 +0000

Getting a seemingly bizarre problem with Datascript. For some reason when I run this query without it being wrapped in a function, everything works. But once I wrap it in a function, it returns the value for :block/content for every entity in the database. I'm confused because I haven't encountered any issues with wrapping other Datascript queries in the past. Does anyone more experienced than me with Datascript see any issues?

;; Works fine and returns the correct value
(ds/q '[:find ?block-text
        :where
        [?id :block/id "l_63xa4m1"]
        [?id :block/content ?block-text]]
      @conn)

;; Returns every value for `:block/content` in the db
(defn content-find
  [id-passed]
  (ds/q '[:find ?block-text
          :where
          [?id :block/id ?id-passed]
          [?id :block/content ?block-text]]
        @conn))
(content-find "l_63xa4m1")

Why does Transit not allow serialization of clojure(script) functions ? What is the inherent difficulty there ?

Mon, 29 Jul 2019 23:10:55 +0000

I am trying to serialize my datascript database to JSON for storage on a filesystem.
Some of the data inside my database includes functions. For reasons that are not interesting, I need to store them in the database for now with other session info for the application. But I get an exception that transit "cannot write Function"

I looked at the code and it simply tries to handle data structures only - maps, vectors, etc. But there is no handler for functions. So I KNOW WHY I get the error, but the gist of my question is why it was not implemented to be able to serialize functions as well ?

Is it just too novel an thought ?

thanks

Clojure Q&A - Recent questions tagged datascript

Wrapping Datascript query in a function?

Why does Transit not allow serialization of clojure(script) functions ? What is the inherent difficulty there ?