Fix crash when no / empty validator defined

thexa4 · thexa4 · commit 11e546fb9610 · 2023-08-05T18:06:50.000Z
diff --git a/lib/media_types/constructable.rb b/lib/media_types/constructable.rb
@@ -125,6 +125,7 @@ def validate!(output, **validation_opts)
     end
 
     def validatable?
+      return false if media_type_combinations.nil?
       return false unless media_type_combinations.include? as_key
 
       __getobj__.validatable?(self)
