An ActiveRecord extension to update a record if found, otherwise create it

create_or_update.rb

# frozen_string_literal: true

module ActiveRecord
  class Base
    # Create or update a record by field (or fields). This will look for each field name as a key in the
    # options hash.
    # @example
    #   # If a user with that email exists then update his name and birthdate, else create him
    #   attributes={name: "Bassem Mawhoob", email: "test@example.com", :birthdate=>'1980/01/01'}
    #   User.create_or_update_by(:email, attributes)
    # @example
    #   # If a user with that name and birthdate exists then update his email, else create him
    #   attributes={name: "Bassem Mawhoob", email: "test@example.com", :birthdate=>'1980/01/01'}
    #   User.create_or_update_by([:name, :birthdate], attributes)
    def self.create_or_update_by(condition_keys = :id, attributes = {})
      condition_pairs = [*condition_keys].index_with do |key|
        (attributes.delete(key) || attributes.delete(key.to_s))
      end
      record = find(:first, conditions: condition_pairs) || new
      attributes.merge!(condition_pairs) if record.new_record?
      record.assign_attributes(attributes)
      record.save!
      record
    end
  end
end