What are some examples of caching in Ruby on Rails?

What are some examples of caching in Ruby on Rails?

In Ruby on Rails, caching can be implemented in several ways. For example, you can use fragment caching to cache parts of your views, or you can use action caching to cache entire controller actions.

Can you explain fragment caching with an example?

Sure! Fragment caching allows you to cache specific parts of a view. For instance, if you have a sidebar that displays user statistics, you can wrap that part in a cache block like this: <% cache 'user_stats' do %> ... %>. This way, it only re-renders when the user stats change.

What about caching database queries?

You can cache database queries using Rails' built-in caching methods. For example, you can use Rails.cache.fetch to store the result of a query. This way, if the same query is made again, it retrieves the result from the cache instead of hitting the database.

Are there any best practices for caching in Rails?

Yes, some best practices include caching only what is necessary, setting appropriate expiration times, and monitoring cache performance to avoid stale data.