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Rails | Convert all hash keys to symbols (symbolized_keys / deep_symbo

2019/04/16に公開

As the title.

 { 'a' => 1, 'b' => 2, 'c' => 3 }.symbolize_keys # => {:a=>1, :b=>2, :c=>3}

When the hierarchy of hash is deep

deep_symbolize_keys it is deep_symbolize_keys , it will change to all symbols regardless of the hierarchy. (Rails 4)

 { 'a' => 1, 'b' => 2, 'c' => { 'd' => 3 } }.deep_symbolize_keys # => {:a=>1, :b=>2, :c=>{:d=>3}}

deep_symbolize_keys , for example, even if there is an array in the middle, it does not matter.

 {'a' => 1, 'b' => 2, 'c' => [{'d' => [ { 'e' => 3 }] } ] }.deep_symbolize_keys # => {:a=>1, :b=>2, :c=>[{:d=>[{:e=>3}]}]}

There is also a destructive method. ( symbolize_keys / deep_symbolize_keys! )
I posted it because I didn't hit it with "Rails / All / Symbols".

何か質問、悩み事、相談などあればLINEオープンチャットもご利用ください。

2019-04-16