Hi, I would like to save a mongo collection to a file, and later
read that file into a clojure program. congomongo 'fetch' returns a
lazy sequence of clojure types ..
somnium.dwnload=> (doseq [v (fetch :tweets)] (prn (type v)))
clojure.lang.PersistentArrayMap
clojure.lang.PersistentArrayMap
...
I am trying to write to disk in clojure format with print-dup :
(defn write-database2 [ file obj]
(with-open [w (FileWriter. file)]
(binding [*out* w *print-dup* true] (prn obj))))
but I get this error:
(write-database2 "f.dat" (fetch :tweets))
java.lang.IllegalArgumentException: No method in multimethod
'print-dup' for dispatch value: class com.mongodb.ObjectId
Thanks!
Brian
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