ActiveRecord pluck_to_hash - pluck Active Record attributes into a Ruby Hash

application_record.rb

class ApplicationRecord < ActiveRecord::Base
  self.abstract_class = true

  def self.pluck_to_hash(*column_names, **aliased_columns)
    column_names = self.column_names.map(&:to_sym) if column_names.blank? && aliased_columns.blank?

    columns_to_pluck = column_names + aliased_columns.values
    keys = column_names + aliased_columns.keys

    pluck(*columns_to_pluck).map do |row|
      Hash[keys.zip(Array(row))]
    end
  end
end

Pluck all columns if given no arguments

> User.pluck_to_hash
=>
[{id: 2,
  email: "fred@example.com",
  created_at: Fri, 10 Feb 2023 11:29:06.615232000 UTC +00:00,
  updated_at: Wed, 15 Feb 2023 14:36:34.107862000 UTC +00:00,
  role: "admin",
  name: "Fred Dibnah"},
 {id: 1,
  email: "tony@example.com",
  created_at: Fri, 10 Feb 2023 11:29:06.615232000 UTC +00:00,
  updated_at: Thu, 16 Feb 2023 09:20:40.963285000 UTC +00:00,
  role: "superuser",
  name: "Tony Blackburn"}]

Pluck selected columns

> User.pluck_to_hash(:id, :email)
=> [{id: 2, email: "fred@example.com"}, {id: 1, email: "tony@example.com"}]

Alias the resulting hash key names, including computed values

> User.pluck_to_hash(full_name: :name, age_of_account: Arel.sql('now()::date - created_at::date'))
=> [{full_name: "Fred Dibnah", age_of_account: 6}, {full_name: "Tony Blackburn", age_of_account: 6}]