Add generic default cache_key proc

`SuperGood::SolidusTaxJar.cache_key` uses different `APIParams`
methods for calculating cache keys for different models.

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/super_good/solidus_taxjar.rb b/lib/super_good/solidus_taxjar.rb
index 8841acd..35d9155 100644
--- a/lib/super_good/solidus_taxjar.rb
+++ b/lib/super_good/solidus_taxjar.rb
@@ -26,7 +26,10 @@ module SuperGood
     end
 
     self.cache_duration = 3.hours
-    self.cache_key = ->(order) { APIParams.order_params(order).to_json }
+    self.cache_key = ->(record) {
+      record_type = record.class.name.demodulize.underscore
+      APIParams.send("#{record_type}_params", record).to_json
+    }
     self.discount_calculator = ::SuperGood::SolidusTaxJar::DiscountCalculator
     self.exception_handler = ->(e) {
       Rails.logger.error "An error occurred while fetching TaxJar tax rates - #{e}: #{e.message}"