Construct nested OpenStruct object

Question

I have to mimic a Google API response and create a 2-level deep data structure that is traversable by . like this:

=> user.names.first_name

Bob

Is there any smarter/better way than this:

 user = OpenStruct.new(names: OpenStruct.new(first_name: 'Bob'))

Does this answer your question? [Convert Hash to OpenStruct recursively](https://stackoverflow.com/questions/42519557/convert-hash-to-openstruct-recursively) — Jon Schneider, Oct 04 '22 at 15:50

score 10 · Accepted Answer · answered Jan 23 '18 at 07:37

10

This method is rude method but works,

require 'ostruct'
require 'json'
# Data in hash
data = {"names" => {"first_name" => "Bob"}}
result = JSON.parse(data.to_json, object_class: OpenStruct)

And another method is adding method to Hash class itself,

class Hash
  def to_openstruct
    JSON.parse to_json, object_class: OpenStruct
  end
end

Using above method you can convert your hash to openstruct

data = {"names" => {"first_name" => "Bob"}}
data.to_openstruct

answered Jan 23 '18 at 07:37

nerding_it

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I feel like I've been looking for this answer for ten years...thank you! – bonh Jan 06 '22 at 01:50
In a gist: https://gist.github.com/smtlaissezfaire/ad1fbf6d2f765208a3de2b0ab9721e24 – smtlaissezfaire Jan 24 '23 at 19:56
Note that it gets funky if you try to nest a deep_openstruct instead another deep_openstruct – smtlaissezfaire Jan 24 '23 at 19:56

Construct nested OpenStruct object

1 Answers1