implement #cache_object helper, closes #1560

padrino-cache/lib/padrino-cache.rb

@@ -93,6 +93,7 @@ class << self
       #   MyApp.cache.clear
       #
       def registered(app)
+        app.helpers Padrino::Cache::Helpers::ObjectCache
         app.helpers Padrino::Cache::Helpers::CacheStore
         app.helpers Padrino::Cache::Helpers::Fragment
         app.helpers Padrino::Cache::Helpers::Page

padrino-cache/lib/padrino-cache/helpers/cache_object.rb

@@ -0,0 +1,23 @@
+module Padrino
+  module Cache
+    module Helpers
+      module ObjectCache
+        def cache_object(key, opts = {})
+          if settings.caching?
+            began_at = Time.now
+            if value = settings.cache[key.to_s]
+              logger.debug "GET Object", began_at, key.to_s if defined?(logger)
+            else
+              value = yield
+              settings.cache.store(key.to_s, value, opts)
+              logger.debug "SET Object", began_at, key.to_s if defined?(logger)
+            end
+            value
+          else
+            yield
+          end
+        end
+      end
+    end
+  end
+end

padrino-cache/test/test_padrino_cache.rb

@@ -325,4 +325,25 @@
     assert_equal '{"foo":"bar"}', body
     assert_match /json/, last_response.content_type
   end
+
+  it 'should cache an object' do
+    counter = 0
+    mock_app do
+      register Padrino::Cache
+      enable :caching
+      get '/' do
+        result = ''
+        2.times do
+          result = cache_object 'object1' do
+            counter += 1
+            { :foo => 'bar' }
+          end
+        end
+        result[:foo].to_s
+      end
+    end
+    get '/'
+    assert_equal 'bar', body
+    assert_equal 1, counter
+  end
 end