Hey Brian,
been a while since that Post, Issue #1 has been resolved for a while (see
http://dev.clojure.org/jira/browse/CLJS-466) but I actually switched to
using proper EDN tags via IPrintWithWriter, clj/print-method and
clojure.edn/read-string like you suggested.
#2 I solved indirectly via #1, I didnt find an acceptable BigDecimal
JavaScript implementation and since all the math happens on the server
anyways I just transmit them as Strings inside records. The Reader function
in CLJS just keeps it as a String, the CLJ Reader function just does
(BigDecimal. s) so all is good. (eg. #ns/money [:EUR "1234567.89"])
On Thu, May 9, 2013 at 9:03 PM, Brian Jenkins <bonky...@gmail.com> wrote:
> Hi, Thomas.
>
> I also found this frustrating. Here's a work-around I came up with:
>
>
> ;; assuming (defrecord Design [id name]) in namespace tektite.model.design
>
> (cljs.reader/register-tag-parser! "tektite.model.design.Design"
> tektite.model.design/map->Design)
>
> (extend-protocol IPrintWithWriter
> tektite.model.design/Design
> (-pr-writer [coll writer opts]
> (let [pr-pair (fn [keyval] (pr-sequential-writer writer pr-writer "" "
> " "" opts keyval))]
> (pr-sequential-writer writer pr-pair "#tektite.model.design.Design{"
> ", " "}" opts coll))))
>
>
> On the server side, I read EDN out of the request body with
> clojure.edn/read (because clojure.core/read is
> unsafe for reading evil strings from the internet). clojure.edn/read
> doesn't pick up new readers
> from data_readers.clj or *data-readers* (fortunately), but can be taught
> new tags like this:
>
>
> (def model-readers {'tektite.model.design.Design
> #'tektite.model.design/map->Design})
>
> (defn read-edn-body [context]
> (clojure.edn/read {:readers model-readers, :eof nil}
> (java.io.PushbackReader.
> (java.io.InputStreamReader.
> (get-in context [:request :body])
> "UTF-8"))))
>
>
> (I use liberator, so the request arrives in a context hash)
>
> Best,
> Brian
>
> On Monday, January 7, 2013 1:13:30 AM UTC+1, Thomas Heller wrote:
>>
>> Hey,
>>
>> I'm writing a Clojure Webapp with a CLJS Frontend and expected to be able
>> to cljs.reader/read-string everything I pr-str'd on the CLJ side. That
>> however does not work for defrecords and BigDecimals (1.1M) .
>>
>> 1. defrecord
>>
>> In CLJ I can:
>>
>> (ns dummy)
>> (defrecord Foo [bar])
>> (pr-str (Foo. 1)) ; => "#dummy.Foo{:bar 1}"
>>
>> in CLJS however this will print as
>>
>> "#Foo{:bar 1}"
>>
>> missing the Namespace. I found an old
>> post<https://groups.google.com/d/msg/clojure/YSkPd4zQTKQ/757Wd4Ex8pAJ>about
>> this but no other information.
>>
>> Also when I pr-str this record in CLJ and cljs.reader/read-string it in
>> CLJS it fails with "Could not find tag parser for dummy.Foo in ("inst"
>> "uuid" "queue") ", although the defrecord exists and is in the same ns
>> (actually a cljsbuild crossover). I figured out that I can
>> (cljs.reader/register-tag-**parser! 'dummy.Foo make-foo) but thats seems
>> faulty. I read about EDN and understand why the reader would think its
>> reading a Tag but I can do read-string in CLJ just fine. Shouldnt both
>> sides be equal here?
>>
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