I'm working on a website with a frontender who asked to be able to save
JSON maps that contain field names such as:
"$$hashKey" : "00C"
The dollar signs are a violation of MongoDB limits on field names, so i
need to convert to something else and then convert back. So I thought I
would convert to * or !. Converting is no problem, but converting back is
not working. I walk the deeply nested JSON objects with:
(defn walk-deep-structure [next-item function-to-transform-values]
(walk/postwalk
(fn [%]
(if (and (vector? %) (= (count %) 2) (keyword? (first %)))
[(function-to-transform-values %) (second %)]
%))
next-item))
which I call like:
results (walk-deep-structure @future-data-return (fn [%]
(st/replace (name (first %)) #"\*" "$")))]
which doesn't work.
I switch to the repl to test this:
=> (def f (fn [%] (st/replace (name (first %)) #"!" "$")))
=> (f [:!!username "michael"])
StringIndexOutOfBoundsException String index out of range: 1
java.lang.String.charAt (String.java:695)
or:
=> (def f (fn [%] (st/replace (name (first %)) #"\*" "$")))
=> (f [:**username "michael"])
StringIndexOutOfBoundsException String index out of range: 1
java.lang.String.charAt (String.java:695)
What am I doing wrong?
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