Best Practices

The views layer should not manage domain logic, which belongs in models, or orchestrate application flow, which is a controller's responsibility.

Keep the view layer clean with helpers, partials, and built-in functionality effectively.

Yes, performance issues are mostly solved by better defining the problem to eliminate the existing complexity in the code.

The most common location of performance issues in the MVC framework is the database layer. The 80/20 Pareto law for slow queries.

ActiveRecord simplifies database interactions, but misusing its API can lead to severe performance bottlenecks.

Never Modify the `up` Method on a Committed Migration. Never Use External Code in a Migration. Always Provide a `down` Method in Migrations

Rake tasks operate outside the regular Rails environment, making it a challenge to test them in isolation.

Lack of a dedicated test suite in Rails plugins and gems undermines their reliability and limits their integration into larger applications.

'Tell, Don't Ask': shigy from querying objects about their state to commanding them what to do. Keep tests clean and focused on behavior rather than implementation details.