- Only Rails built-in functionalities and sub-frameworks should be used:
- It is strictly forbidden to use any gem, library or framework that replicates functionality already provided by Rails
RSpec or its alternatives: minitest only
microservices: just a big monolith app
design patterns are allowed(beside what’s already there)
viewcomponents nor trailblazer
- No command or operation objects that are not patterns
- No presentation objects. Never try to test any of these in isolation. Only helper tests are allowed
- No mongoDB: PostgreSQL only
- Minimal use of 3rd party gems:
- You have to explicitly ask, and be allowed to add a 3rd party gem. This has to be reviewed and vetted unless the gem is already on our whitelist. You would have to answer these questions first:
- Is the gem well maintained? When was the last commit?
- If they stop maintaining it, are we allowed to fork it ourselves and keep it running?
- Would it be simple to maintain it ourselves in case they abandon it?
- Does it have a major impact on our app? Will the app stop working without it?
- Minimum use of 3rd party APIs and services
- The other way around is true as well. We do not build Rails
API only backends
- Minimum configuration required to run the app in local:
- Limited set of local ENV variables required.
- You can introduce a new ENV variable only when absolutely necessary
- If an ENV is required you are expecting to be there that is not present during runtime you have to raise an exception.
- The ENV should hold secrets only. Use Rails encrypted credentials if possible:
- Anything non-secret, that can be safely committed and submitted to repo, should be hardcoded as a CONST at the beginning of a file.
- Anything environment dependent should go to the appropriate environment config file: test.rb, development.rb… or an initializer
- It should be enough to start the app in development by simply typing
- No other services should be required to run the app locally
Docker use for development is strictly forbidden
- No virtual machines in local, and no windows subsystem for Linux
- Only mac and Ubuntu local environments are allowed
React or vue.js
- All client side JS logic has to go to Stimulus controllers
- jQuery CAN be used
- Turbo and Hotwire are a must for any advanced user interactions
- But be careful with streams, or anything that goes over sockets
- No logic in models. Models can have:
- relationships defined
- finders and scopes
- Some very basic simple methods beyond that
- Most of the logic should go to controllers
- Specifically, no model lifecycle callbacks or observers are ever allowed to be used
- if multiple objects are created at once, ask yourself:
- Should this be wrapped inside a transaction?
- Should there be an explicit lock?
- Do not overthink DB indexing
- Testing before code whenever you can
- Be sure to never test Rails itself or gems
- System tests are a must(capybara and chrome)
- Followed by controller test
- It is allowed to use
assigns in controller tests(add this gem: )
- Model tests less often
- Only when absolutely needed, since we do not have much logic there. We do not want to be testing ActiveRecord!
- Fixtures are OK to be used.
- No factories are allowed
- Devise is allowed
- If you are rolling out your own solution makes sure to use
has_secure_password and add bcrypt gem
- Attach files using ActiveStorage only
- Simple branching strategy
- Branch directly out of the
main branch, merge back to the
main branch. Deploy immediately
- No releases, or complicated branching strategies. It is all constantly and continuously deployed
- For jobs use
ActiveJob only and its default backends in development and testing
- In development no background job queue is allowed to be run, expect simple
Procfile nor foreman should be allowed in development
Want to work with Us?
Building your next SaaS is just around a corner. Email us now, and let us know about your idea: firstname.lastname@example.org