Swagger stackoverflow with recursive specs

[ikitommi]

copied from: metosin/compojure-api#339

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When I set the coercion to :spec and use a recursive spec like :

(s/def ::user nil?) ;; will be redefined below
(s/def ::name string)
(s/def ::parent (s/nilable ::user))
(s/def ::user (s/keys :req-un [::name ::parent]))

Swagger fail with this error:

{"type":"unknown-exception","class":"java.lang.StackOverflowError"}

It seems that the clojure.spec -> swagger conversion keep walking the recursive spec until the stack blows up.

[ikitommi]

Currently, we haven't use schema references in JSON Schema or in Swagger JSON Schema. This is the reason to implement those. When it works, there could be a option how to generate the nested schemas:

a) inline 'em all (current)
b) only references
c) custom behaviour?

[ikitommi]

There is a quick fix emerging in #82. Real fix would be to introduce a new SpecReference type for this?