Rails.cache.fetch caching in development

Question

Using Rails.cache.fetch like below is caching even in my development environment (with caching turned off):

@boat_features = Rails.cache.fetch("boat_features", expires_in: 10.minutes) do
  BoatFeature.all
end

Has anyone run into this before?

Answer 1

That's normal. That sort of caching isn't turned off in development. In a previous app where this was a problem we used the memory store and then added a middleware that did Rails.cache.clear after every request.

Something like

config.middleware.use ClearCache

in development.rb

and then your ClearCache middleware should look something like

class ClearCache
  def initialize(app)
    @app = app
  end

  def call(env)
    @app.call(env)
  ensure
    Rails.cache.clear
  end
end

In Rails 3.2 there's also ActiveSupport::Cache::NullStore

Answer 2

I had the same problem. I worked around a lot then came up with this simple solution. In your development configuration file config/environments/development.rb add these settings

config.perform_caching = false config.cache_store = :null_store