Rails - Get all keys from params hash

Question

In order to improve my Rails app security, I want to know how to get all keys from a parametters hash

hash example :

params = 
{"id"=>23, "name"=>"test", "infos"=>{"data"=>"er323e3ee23reQir", "signed"=>true}}

if I do params.keys

I obtained : ["id", "name", "infos"]

But I want to get ALL keys, in a simple array, like : ["id", "name", "infos", "data", "signed"]

there is a simple way to do this ?

Answer 1

Try this:

def deep_hash_keys(h)
 h.keys + h.map { |_, v| v.is_a?(Hash) ? deep_hash_keys(v) : nil }.flatten.compact
end

params = {"id"=>23, "name"=>"test", "infos"=>{"data"=>"er323e3ee23reQir", "signed"=>true}}

deep_hash_keys(params) # => ["id", "name", "infos", "data", "signed"]