Rails 7.1: Issues with caching serialized JSON responses in API controller
I'm having trouble with I'm working on a Rails 7.1 application where I'm attempting to cache JSON responses from my API controller, but I'm running into unexpected behavior... I have a `ProductsController` that retrieves a list of products, and I want to cache the response for performance reasons. However, when the data changes, the cached response doesn't seem to update as expected. Here's the relevant code from my controller: ```ruby class ProductsController < ApplicationController def index # The cache key is based on the product count cache_key = "products/#{Product.count}" @products = Rails.cache.fetch(cache_key, expires_in: 12.hours) do Product.all.to_json(include: :category) end render json: @products end end ``` After implementing this, I noticed that when I add or remove products, the cached response still returns the old data for some time, which is frustrating because I need the API consumers to see the most up-to-date information immediately. I’ve checked the Rails cache store configuration, and it looks like this: ```ruby config.cache_store = :memory_store, { size: 64.megabytes } ``` I also tried using `touch` on the products to update the cache key, but it still doesn’t seem to work. My expectation was that since the cache key is tied to the product count, it should automatically create a new cache entry when the count changes. However, I still see the old cached data until the cache expires. Is there a better way to handle caching for this scenario? Should I consider using a different cache key strategy or maybe an alternative to the Rails caching mechanism? Any help or insights would be greatly appreciated! My development environment is Linux. What am I doing wrong? Thanks, I really appreciate it!