I’m working on building a public REST API with Ruby on Rails and I know that Rails has built-in RESTful routing capabilities. However, I’m wondering if these default Rails routes are actually suitable for a production public API or if there are better approaches.
One thing I’m particularly confused about is how to handle API versioning properly. For example, if I want to create URLs like myapp.com/api/v1/users/123 or myapp.com/api/v2/products/456, what’s the recommended way to set this up in Rails?
I’ve seen different approaches online but I’m not sure which one is considered the industry standard. Should I use namespaces in my routes file? Are there any gems that make this easier? Also, how do you handle backward compatibility when you need to update your API version?
Any guidance on Rails API design patterns would be really helpful since I want to make sure I’m following best practices from the start.
rails default routing works great for public apis, but u should add rate limiting and auth middleware from day one. i’ve watched too many devs skip this and regret it later. also, check out the grape gem if u want something more api-focused than vanilla rails - better param validation and auto-generated docs right out of the box.
Namespacing is definitely the way to go for API versioning in Rails. I’ve been maintaining several production APIs and found that nested namespaces like namespace :api do namespace :v1 do work well. This keeps your controllers organized in separate folders like app/controllers/api/v1/users_controller.rb, which makes maintenance way easier as your API grows. For backward compatibility, I keep old version controllers running while gradually migrating users to newer versions. You can share common logic between versions by extracting it into service objects or concerns. One thing I learned the hard way - version your serializers too, not just controllers. The active_model_serializers gem helps with this. Rails default RESTful routes work fine for public APIs, but you might want to be more selective about which actions you expose. I usually only enable the actions I actually need rather than all seven default REST actions.
I’ve built several Rails APIs and namespacing works great, but check out the rails-api gem or use the --api flag when creating your app. It strips out middleware and view code you don’t need, making everything lighter. For versioning, I skip URL paths and use headers instead - keeps URLs cleaner and version management way more flexible. Just check the Accept header for something like application/vnd.myapp.v1+json. Rails RESTful routes work well for public APIs, but don’t expose too much. I disable unused actions and only add custom routes when absolutely necessary. Here’s what I wish I knew earlier: implement proper error handling from day one. Create a base controller that standardizes error responses across all versions. Trust me, it’ll save you massive headaches when you need consistent error formatting later.