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is:issue is:open Hash symbolize_keys stringify_keys does not work on nested hashes #253
Closed as not planned
Description
symbolize_keys and stringify_keys does not work on nested hashes:
> {"this"=>{"is"=>:an, "awful"=>:example}, "very"=>:weird}.symbolize_keys
=> {:this=>{"is"=>:an, "awful"=>:example}, :very=>:weird}
and:
> {:this => {:is => :an , :awful => :example}, :very => :weird}.stringify_keys
=> {"this"=>{:is=>:an, :awful=>:example}, "very"=>:weird}
Activity
trans commentedon Oct 1, 2016
Should they do this? Does ActiveSupport/Rails do this?
ioquatix commentedon Oct 13, 2016
Nope, I don't think it should work on nested hashes. Also,
{stringify/symbolize}_keysis a code smell.. vote to close this issue.ioquatix commentedon Mar 9, 2017
@tilo can you explain your use case a bit more? Did you know JSON and MsgPack have options to load with symbol keys?
trans commentedon Nov 2, 2026
This matches ActiveSupport, where
symbolize_keys/stringify_keysare also shallow; in Facets 4.0 they live inlib/rails. For nested hashes useh.recurse(&:symbolize_keys)orh.recurse(&:rekey).