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Difference of record instance from card

I am trying to call clojure.walk/stringify-keyson a map which may include instances of records. Since stringify-keys is recursive, it tries to convert the keys to my record (since (map? record-var)is true), which causes an error. Is there a way to find out if var is a record, not just a Clojure card? i d would like to provide my own implementation stringify-keysthat recognizes records.

The current implementation stringify-keyscalls the following:

(use '[clojure.walk :only [stringify-keys]])

(defrecord Rec [x])    

(let [record (Rec. "foo")
      params {:x "x" :rec record}]
    (stringify-keys params))

This throws the following exception: UnsupportedOperationException Unable to create an empty: user.Rec user.Rec (NO_SOURCE_FILE: 1)

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2 answers

Entries seem to implement the IRecord marker interface:

user=> (defrecord Rec [x])    
user.Rec

user=> (require '[clojure.reflect :as r])
nil
user=> (:bases (r/reflect Rec))
#{java.io.Serializable clojure.lang.IKeywordLookup clojure.lang.IPersistentMap clojure.lang.IRecord java.lang.Object clojure.lang.IObj clojure.lang.ILookup java.util.Map}

user=> (instance? clojure.lang.IRecord (Rec. "hi"))
true

1.6 record?

+5

, - ( - )

user> (type {:a 1 :b 2})
clojure.lang.PersistentArrayMap
+1

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