Rails Upgrade Strategies
Version upgrades, deprecation warnings, dual boot, testing upgrades, breaking changes
1What is the first recommended step before starting a major Rails upgrade?
What is the first recommended step before starting a major Rails upgrade?
Odpowiedź
Before any major upgrade, it is essential to ensure the application has solid test coverage. Without tests, it is impossible to detect regressions introduced by version changes. Coverage of 80% or more on critical features allows quick identification of problems after each migration step.
2Which Rails tool generates a file listing the necessary changes during an upgrade?
Which Rails tool generates a file listing the necessary changes during an upgrade?
Odpowiedź
The rails app:update command generates an interactive script that compares the current application with configuration files from a new Rails application. It proposes to update configuration files like config/application.rb, config/environments/*.rb and creates a diff file to facilitate migration.
3What is the 'dual boot' strategy in the context of a Rails upgrade?
What is the 'dual boot' strategy in the context of a Rails upgrade?
Odpowiedź
The dual boot strategy allows running the application with two different Rails versions simultaneously using conditional Gemfiles. This enables progressively fixing incompatibilities while keeping the application functional on both versions. Shopify's bootboot gem facilitates this approach by automatically managing dependencies for each version.
How does Rails signal features that will be removed in a future version?
Which configuration treats deprecation warnings as errors in the test environment?
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