Use Postgres UUID

8
Public
Use UUIDs as the default primary key for your models
Used 339 times
• Created by
Andrew Perkins Andrew Perkins
Usage
Once you've finished running this template, Rails will use UUID for any new models you create by default.

If adding foreign keys pointing at a UUID table, make sure to use type: :uuid

class CreateComments < ActiveRecord::Migration[6.0]
  def change
    create_table :comments, id: :uuid do |t|
      t.references :post, null: false, type: :uuid, foreign_key: true
      t.timestamps
    end
  end
end

Run this command in your Rails app directory in the terminal:

rails app:template LOCATION="https://railsbytes.com/script/V4Ys1d"
Template Source

Review the code before running this template on your machine.

model_name = generate(:migration, 'enable_uuid')

command = <<-CODE
MIGRATION_FILE=$(find . -name "*enable_uuid.rb") && 
awk -v q=\\' '1;/change/{ print "    enable_extension" q "pgcrypto" q}' $MIGRATION_FILE > enable_uuid.rb &&
mv enable_uuid.rb $MIGRATION_FILE
CODE
inside('db/migrate') do
  run(command)
end


initializer 'generators.rb', <<-CODE
Rails.application.config.generators do |g|
  g.orm :active_record, primary_key_type: :uuid
end
CODE
Comments
Julian Pinzon Eslava
Hey Andrew! I think it would be nice to add this extra bit to this template to enable default ordering by created at when using UUIDs
https://t.co/eEZpJqCbXX