Merge pull request #379 from openstax/search_digest

Calculate a search digest from the search results

Gemfile.lock

@@ -120,9 +120,8 @@ GEM
       pager (~> 1.0)
     choice (0.2.0)
     chronic (0.10.2)
-    codecov (0.2.12)
-      json
-      simplecov
+    codecov (0.6.0)
+      simplecov (>= 0.15, < 0.22)
     concurrent-ruby (1.1.9)
     crack (0.4.5)
       rexml
@@ -149,9 +148,9 @@ GEM
     ejs (1.1.1)
     erubi (1.10.0)
     eventmachine (1.2.7)
-    exception_notification (4.4.3)
-      actionmailer (>= 4.0, < 7)
-      activesupport (>= 4.0, < 7)
+    exception_notification (4.5.0)
+      actionmailer (>= 5.2, < 8)
+      activesupport (>= 5.2, < 8)
     excon (0.79.0)
     execjs (2.7.0)
     factory_bot (6.1.0)
@@ -231,7 +230,6 @@ GEM
       thor (>= 0.14, < 2.0)
     jquery-ui-rails (6.0.1)
       railties (>= 3.2.16)
-    json (2.5.1)
     jwt (2.3.0)
     keyword_search (1.5.0)
     lev (11.0.0)
@@ -311,7 +309,8 @@ GEM
       rails (>= 5.0, < 7.0)
       representable
       roar (>= 1.0)
-    openstax_api (9.4.1)
+    openstax_api (9.5.0)
+      addressable
       doorkeeper
       exception_notification
       lev (>= 11)
@@ -484,7 +483,7 @@ GEM
       simplecov-html (~> 0.11)
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.12.3)
-    simplecov_json_formatter (0.1.3)
+    simplecov_json_formatter (0.1.4)
     sortability (1.0.0)
       rails
     sprockets (3.7.2)

app/controllers/api/v1/exercises_controller.rb

@@ -83,7 +83,11 @@ def index
 
       standard_search(
         Exercise, SearchExercises, Exercises::SearchRepresenter, user: current_api_user
-      )
+      ) do |outputs|
+        digest = Digest::SHA256.new
+        outputs.items.each { |exercise| digest << exercise.cache_key_with_version }
+        response.headers['X-Digest'] = digest.hexdigest
+      end
     end
 
     ##########

config/initializers/cache.rb

@@ -0,0 +1,6 @@
+# Clear the Rails cache on code reload (dev environment only)
+if Rails.env.development? && !Rails.application.config.cache_classes
+  Rails.autoloaders.main.on_unload do |klass, _abspath|
+    Rails.cache.clear
+  end
+end