How can I implement caching in my Rails application?

How can I implement caching in my Rails application?

You can use Rails' built-in caching mechanisms like fragment caching, action caching, or low-level caching. Which one are you interested in?

I'm interested in fragment caching. How does that work?

Fragment caching allows you to cache specific parts of your views. You can use the cache method in your views to wrap the content you want to cache.

Can you give me an example of how to use the cache method?

Sure! In your view file, you can do something like this: <%= cache('unique_cache_key') do %> <%= render @posts %> <% end %>.

What happens if the data changes?

If the data changes, you can expire the cache by using expire_fragment or by setting a cache expiration time.