Add configuration to disable cache

CHANGELOG.md

@@ -8,6 +8,9 @@ This project adheres to [Semantic Versioning].
 Changes:
 - Drop support for Rails < 7.0.
 
+Feature:
+- Add `cache_enabled` to config to be able to enable/disable cache.
+
 Fix:
 - Make `RateStore` marshalable so a bank using it can be marshaled.
 

README.md

@@ -33,15 +33,15 @@ ActiveCurrency::AddRates.call(currencies: %w[EUR USD])
 You can then exchange money by using the Money gem helpers:
 
 ```rb
-10.to_money('EUR').exchange_to('USD').cents
+10.to_money("EUR").exchange_to("USD").cents
 ```
 
 If you need to look up the previous currency rates:
 
 ```rb
-ActiveCurrency::Rate.value_for('EUR', 'USD', 1.month.ago)
+ActiveCurrency::Rate.value_for("EUR", "USD", 1.month.ago)
 # => 1.151
-ActiveCurrency::Rate.where(from: 'EUR', to: 'USD').pluck(:value)
+ActiveCurrency::Rate.where(from: "EUR", to: "USD").pluck(:value)
 # => [1.162, 1.162, 1.161, 1.161, 1.163, …]
 ```
 
@@ -88,7 +88,7 @@ add the following to your application’s initializers:
 ```rb
 ActiveCurrency.configure do |config|
   config.remote_bank = :open_exchange_rates
-  config.open_exchange_rates_app_id = '…'
+  config.open_exchange_rates_app_id = "…"
 end
 ```
 
@@ -101,16 +101,21 @@ You can provide any Money-compatible bank when calling
 ActiveCurrency::AddRates.call(…, bank: …)
 ```
 
-## Apply a multiplier
-
-If you want to increase or decrease the currency rates by a given multiplier,
-you can do so by setting the `multiplier` option:
+## Configuration
 
 ```rb
 ActiveCurrency.configure do |config|
-  config.multiplier = {
-    ["EUR", "USD"] => 1.01,
-  }
+  # Use the money-open-exchange-rates bank instead.
+  # config.remote_bank = :open_exchange_rates
+  # config.open_exchange_rates_app_id = "…"
+
+  # Disable `Rails.cache`.
+  # config.cache_enabled = false
+
+  # Increase or decrease the currency rates by a given multiplier.
+  # config.multiplier = {
+  #   ["EUR", "USD"] => 1.01,
+  # }
 end
 ```
 
@@ -124,8 +129,8 @@ For that, you can use a fake rate store in your `rails_helper.rb`:
 ```rb
 MoneyRails.configure do |config|
   rate_store = Money::RatesStore::Memory.new.tap do |store|
-    store.add_rate('USD', 'EUR', 1.5)
-    store.add_rate('EUR', 'USD', 0.67)
+    store.add_rate("USD", "EUR", 1.5)
+    store.add_rate("EUR", "USD", 0.67)
   end
   config.default_bank = Money::Bank::VariableExchange.new(rate_store)
 end

lib/active_currency/cacheable_store.rb

@@ -7,6 +7,7 @@ module CacheableStore
     include AfterCommitEverywhere
 
     def get_rate(from, to, date = nil)
+      return super unless ActiveCurrency.configuration.cache_enabled?
       return super if date
 
       Rails.cache.fetch(cache_key(from, to), expires_in: 1.hour) do
@@ -17,6 +18,8 @@ def get_rate(from, to, date = nil)
     def add_rate(from, to, rate, date = nil)
       super
 
+      return unless ActiveCurrency.configuration.cache_enabled?
+
       after_commit do
         Rails.cache.delete(cache_key(from, to))
       end

lib/active_currency/configuration.rb

@@ -6,10 +6,16 @@ def initialize
       @remote_bank = :eu_central_bank
       @open_exchange_rates_app_id = nil
       @multiplier = {}
+      @cache_enabled = true
     end
 
     attr_accessor :remote_bank,
                   :open_exchange_rates_app_id,
-                  :multiplier
+                  :multiplier,
+                  :cache_enabled
+
+    def cache_enabled?
+      !!@cache_enabled
+    end
   end
 end