1/15/2024 0 Comments Rails mysql uuid![]() If we ever need to increase this, the change would be as simple as increasing the length in our ID generator and updating our database schema to accept the new size. You can generate UUID with Ruby by running: require 'securerandom' SecureRandom.uuid > 'b436517a-e294-4211-8312-8576933f2db1'. This gives us a 1% probability of a collision in the next ~35 years if we are generating 1,000 IDs per hour. In our case, we used the NanoID collision tool and decided to use 12 character long IDs with the alphabet of 0123456789abcdefghijklmnopqrstuvwxyz. Determining the complexity needed for the ID depends on the application. The longer and more complex the ID, the less likely it is to happen. If this is happening often though, it can be a huge problem. The application can detect a collision, auto-generate a new ID, and move on. If this happens seldomly, it’s not a big deal. These are much more user-friendly in a URL: /v1/deploy-requests/izkpm55j334u ID length and collisionsĪn ID collision is when the same ID is generated twice. This led us to NanoID, which accomplishes exactly that. Easy to generate in multiple programming languages (we use Ruby and Go on our backend).It may seem minor, but to build a product that developers love to use, we need to care about details like these. The browser interprets it as 5 different words. Try double clicking on that ID to select and copy it. UUIDs are great because it’s nearly impossible to generate a duplicate and they obscure your internal IDs. The common solution to this problem is using a UUID (Universally Unique Identifier) instead. We knew that we wanted to avoid using integer IDs so that we wouldn’t reveal the count of records in all our tables. + so, you can store your UUIDs as binary values in your database, and. When we were first building PlanetScale’s API, we needed to figure out what type of identifier we’d be using. + by leveraging the Attributes API that has been available since Rails 5. If I specify g.orm :active_record, primary_key_type: **:binary** in config/initializers/generators.rb Rails tries to use 'blob' for everything, which MySQL also complains about. T.binary :uuid, limit: 16, primary_key: true, null: falseĬREATE TABLE `users` (`uuid` varbinary(16) NOT NULL PRIMARY KEY, `name` varchar(255), `email` varchar(255), `created_at` datetime(6) NOT NULL, `updated_at` datetime(6) NOT NULL) It's only if I set id: false and expressly make the uuid column a primary key does it work: create_table :users, id: false do |t| If I try integrating mysql-binuuid-rails and add the column definition for uuid ( t.binary :uuid, limit: 16), I still get bad SQL: CREATE TABLE `users` (`id` uuid NOT NULL PRIMARY KEY, `uuid` varbinary(16), `name` varchar(255), `email` varchar(255), `created_at` datetime(6) NOT NULL, `updated_at` datetime(6) NOT NULL) Which of course fails, since MySQL doesn't grok "uuid" as a column type. If I follow the steps in the above tutorial, the SQL code Rails generates is: CREATE TABLE `users` (`id` uuid NOT NULL PRIMARY KEY, `name` varchar(255), `email` varchar(255), `created_at` datetime(6) NOT NULL, `updated_at` datetime(6) NOT NULL)įrom: class CreateUsers < ActiveRecord::Migration This tutorial uses PostgreSQL, and we're on MySQL (actually MariaDB), which doesn't have a "uuid" column type. Is there a way for it to natively create / use a UUID column for primary keys, and to assume foreign keys are _UUID and char(36) rather than _id and int? G.orm :active_record, primary_key_type: :uuidīut it still doesn't seem like Rails is “natively” using UUIDs. timestamp_create), but to get Rails to include a primary key for UUID, we've had to build our migrations like this: class CreateLocations "keyboard_uuid", :primary_key => "uuid"įollowing some advice we found elsewhere, we have in config/initializers/generators.db: do |g| ![]() ![]() I just wanted a sanity check to make sure I'm not missing something? We followed the guidance here: (except we're using. The few times I've used RoR before (back in the 2.x/Rails 4 days), we just used the normal "native" primary key functionality and relationships were as simple as belongs_to / has_one etc.įor this though we have to use UUIDs for primary keys, and while the Rails stuff can be made to work like that, it seems like a kludge. We're building an app in Ruby on Rails (Ruby 3, Rails 7.0.4, currently) with distributed MySQL (using replication).
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