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| unless File.exists?('./Gemfile') | |
| File.write('./Gemfile', <<~GEMFILE) | |
| source 'http://rubygems.org' | |
| gem 'activerecord' | |
| gem 'sqlite3' | |
| GEMFILE | |
| system 'bundle install --path=vendor/bundle' | |
| end | |
| require 'bundler/setup' | |
| require 'active_record' | |
| CONFIG = { | |
| adapter: 'sqlite3', | |
| database: './ar_enum_development.sqlite3' | |
| }.freeze | |
| ActiveRecord::Base.configurations['ar_enum_development'] = CONFIG | |
| ActiveRecord::Base.establish_connection(:ar_enum_development) | |
| ActiveRecord::Schema.define do | |
| self.verbose = false | |
| create_table :users, force: true do |t| | |
| t.string :gender, default: 'male' | |
| end | |
| end | |
| module Encryptable | |
| def self.included(base) | |
| base.class_eval do | |
| around_save :encrypt_before_save_and_decrypt_after_save | |
| end | |
| end | |
| def encrypt_before_save_and_decrypt_after_save | |
| encrypt_gender | |
| yield | |
| decrypt_gender | |
| end | |
| def encrypt_gender | |
| v = read_attribute(:gender) | |
| write_attribute(:gender, v.dup.reverse) if v | |
| end | |
| def dectypt_gender | |
| v = read_attribute(:gender) | |
| write_attribute(:gender, v.dup.reverse) if v | |
| end | |
| end | |
| class User < ActiveRecord::Base | |
| # include Encryptable | |
| enum gender: { male: 'male', female: 'female', other: 'other' } | |
| end | |
| u1 = User.create | |
| puts u1.male? | |
| puts u1.gender | |
| u2 = User.create(gender: :other) | |
| puts u2.other? | |
| puts u2.gender | |
| system("sqlite3 -header -column ./ar_enum_development.sqlite3 'select * from users;'") |
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Encryptablemodule is a simple pseudo-encryption.If
Userenablesinclude Encryptable, it will raiseArgumentError.