Dynamic method chaining possible? about store_model HOT 3 CLOSED

class MetaInf
  include StoreModel::Model

  attribute :params, Params.to_type

  def send_chain(methods)
    methods.inject(self, :send)
  end
end

c.meta_inf.send_chain([:params, :role_a, :first_name])
=> "HAPPY"

class Case < ApplicationRecord
  attribute :meta_inf, MetaInf.to_type
end

class MetaInf
  include StoreModel::Model

  attribute :params, Params.to_type
end

class Params
  include StoreModel::Model

  attribute :role_a, RoleA.to_type
end

class RoleA
  include StoreModel::Model

  attribute :last_name, :string
  attribute :first_name, :string
  attribute :middle_name, :string
  attribute :date_of_birth, :string
end

c = Case.take
=> #<Case:0x00007fb28098aff0
 id: 670,
 meta_inf:   #<MetaInf params: #<Params:0x00007fb2802e3c38>,
 created_at: Thu, 25 Oct 2018 15:27:11 UTC +00:00,
 updated_at: Tue, 05 Nov 2019 22:02:31 UTC +00:00>

c.meta_inf.class 
=> MetaInf

c.meta_inf.params
=> #<Params petitioner: nil, role_a: #<RoleA:0x00007fb2803c84f0> >

c.meta_inf.params.role_a
=> #<RoleA last_name: PERSON, first_name: HAPPY, middle_name: nil, date_of_birth: 19731008>

c.meta_inf.params.role_a.first_name
=> "HAPPY"

c.meta_inf.params.role_a.first_name
...
c.meta_inf.params.role_z.first_name

def self.send_chain(methods)
  methods.inject(self, :send)
end

QUERY_PARAMS = [
  [:params, :role_a, :first_name],
  ...
  [:params, :role_z, :first_name]
]

list_of_first_names = QUERY_PARAMS.map do |query|
  c.meta_inf.send_chain(query)  
  # equivalent to c.meta_inf.send(:params).send(:role_a).send(:first_name)
  # or c.meta_inf.params.role_a.first_name
end