quoted_date converts time-like objects to ActiveRecord::Base.default_…

…timezone before serialization. This allows you to use Time.now in find conditions and have it correctly be serialized as the current time in UTC when default_timezone == :utc [#2946 state:resolved]

activerecord/CHANGELOG

@@ -1,5 +1,7 @@
 *Edge*
 
+* quoted_date converts time-like objects to ActiveRecord::Base.default_timezone before serialization. This allows you to use Time.now in find conditions and have it correctly be serialized as the current time in UTC when default_timezone == :utc. #2946 [Geoff Buesing]
+
 * SQLite: drop support for 'dbfile' option in favor of 'database.'  #2363 [Paul Hinze, Jeremy Kemper]
 
 * Added :primary_key option to belongs_to associations.  #765 [Szymon Nowak, Philip Hallstrom, Noel Rocha]

activerecord/lib/active_record/connection_adapters/abstract/quoting.rb

@@ -60,7 +60,12 @@ def quoted_false
       end
 
       def quoted_date(value)
-        value.to_s(:db)
+        if value.acts_like?(:time)
+          zone_conversion_method = ActiveRecord::Base.default_timezone == :utc ? :getutc : :getlocal
+          value.respond_to?(zone_conversion_method) ? value.send(zone_conversion_method) : value
+        else
+          value
+        end.to_s(:db)
       end
 
       def quoted_string_prefix

activerecord/test/cases/base_test.rb

@@ -464,6 +464,60 @@ def test_preserving_time_objects
     end
   end
 
+  def test_preserving_time_objects_with_local_time_conversion_to_default_timezone_utc
+    with_env_tz 'America/New_York' do
+      with_active_record_default_timezone :utc do
+        time = Time.local(2000)
+        topic = Topic.create('written_on' => time)
+        saved_time = Topic.find(topic.id).written_on
+        assert_equal time, saved_time
+        assert_equal [0, 0, 0, 1, 1, 2000, 6, 1, false, "EST"], time.to_a
+        assert_equal [0, 0, 5, 1, 1, 2000, 6, 1, false, "UTC"], saved_time.to_a
+      end
+    end
+  end
+
+  def test_preserving_time_objects_with_time_with_zone_conversion_to_default_timezone_utc
+    with_env_tz 'America/New_York' do
+      with_active_record_default_timezone :utc do
+        Time.use_zone 'Central Time (US & Canada)' do
+          time = Time.zone.local(2000)
+          topic = Topic.create('written_on' => time)
+          saved_time = Topic.find(topic.id).written_on
+          assert_equal time, saved_time
+          assert_equal [0, 0, 0, 1, 1, 2000, 6, 1, false, "CST"], time.to_a
+          assert_equal [0, 0, 6, 1, 1, 2000, 6, 1, false, "UTC"], saved_time.to_a
+        end
+      end
+    end
+  end
+
+  def test_preserving_time_objects_with_utc_time_conversion_to_default_timezone_local
+    with_env_tz 'America/New_York' do
+      time = Time.utc(2000)
+      topic = Topic.create('written_on' => time)
+      saved_time = Topic.find(topic.id).written_on
+      assert_equal time, saved_time
+      assert_equal [0, 0, 0, 1, 1, 2000, 6, 1, false, "UTC"], time.to_a
+      assert_equal [0, 0, 19, 31, 12, 1999, 5, 365, false, "EST"], saved_time.to_a
+    end
+  end
+
+  def test_preserving_time_objects_with_time_with_zone_conversion_to_default_timezone_local
+    with_env_tz 'America/New_York' do
+      with_active_record_default_timezone :local do
+        Time.use_zone 'Central Time (US & Canada)' do
+          time = Time.zone.local(2000)
+          topic = Topic.create('written_on' => time)
+          saved_time = Topic.find(topic.id).written_on
+          assert_equal time, saved_time
+          assert_equal [0, 0, 0, 1, 1, 2000, 6, 1, false, "CST"], time.to_a
+          assert_equal [0, 0, 1, 1, 1, 2000, 6, 1, false, "EST"], saved_time.to_a
+        end
+      end
+    end
+  end
+
   def test_custom_mutator
     topic = Topic.find(1)
     # This mutator is protected in the class definition
@@ -2115,4 +2169,19 @@ def test_create_with_custom_timestamps
   def test_dup
     assert !Minimalistic.new.freeze.dup.frozen?
   end
+
+  protected
+    def with_env_tz(new_tz = 'US/Eastern')
+      old_tz, ENV['TZ'] = ENV['TZ'], new_tz
+      yield
+    ensure
+      old_tz ? ENV['TZ'] = old_tz : ENV.delete('TZ')
+    end
+
+    def with_active_record_default_timezone(zone)
+      old_zone, ActiveRecord::Base.default_timezone = ActiveRecord::Base.default_timezone, zone
+      yield
+    ensure
+      ActiveRecord::Base.default_timezone = old_zone
+    end
 end

activerecord/test/cases/finder_test.rb

@@ -423,6 +423,42 @@ def test_hash_condition_find_with_one_condition_being_aggregate_and_another_not
     assert_equal customers(:david), found_customer
   end
 
+  def test_condition_utc_time_interpolation_with_default_timezone_local
+    with_env_tz 'America/New_York' do
+      with_active_record_default_timezone :local do
+        topic = Topic.first
+        assert_equal topic, Topic.find(:first, :conditions => ['written_on = ?', topic.written_on.getutc])
+      end
+    end
+  end
+
+  def test_hash_condition_utc_time_interpolation_with_default_timezone_local
+    with_env_tz 'America/New_York' do
+      with_active_record_default_timezone :local do
+        topic = Topic.first
+        assert_equal topic, Topic.find(:first, :conditions => {:written_on => topic.written_on.getutc})
+      end
+    end
+  end
+
+  def test_condition_local_time_interpolation_with_default_timezone_utc
+    with_env_tz 'America/New_York' do
+      with_active_record_default_timezone :utc do
+        topic = Topic.first
+        assert_equal topic, Topic.find(:first, :conditions => ['written_on = ?', topic.written_on.getlocal])
+      end
+    end
+  end
+
+  def test_hash_condition_local_time_interpolation_with_default_timezone_utc
+    with_env_tz 'America/New_York' do
+      with_active_record_default_timezone :utc do
+        topic = Topic.first
+        assert_equal topic, Topic.find(:first, :conditions => {:written_on => topic.written_on.getlocal})
+      end
+    end
+  end
+
   def test_bind_variables
     assert_kind_of Firm, Company.find(:first, :conditions => ["name = ?", "37signals"])
     assert_nil Company.find(:first, :conditions => ["name = ?", "37signals!"])
@@ -1087,4 +1123,18 @@ def bind(statement, *vars)
         ActiveRecord::Base.send(:replace_bind_variables, statement, vars)
       end
     end
+
+    def with_env_tz(new_tz = 'US/Eastern')
+      old_tz, ENV['TZ'] = ENV['TZ'], new_tz
+      yield
+    ensure
+      old_tz ? ENV['TZ'] = old_tz : ENV.delete('TZ')
+    end
+
+    def with_active_record_default_timezone(zone)
+      old_zone, ActiveRecord::Base.default_timezone = ActiveRecord::Base.default_timezone, zone
+      yield
+    ensure
+      ActiveRecord::Base.default_timezone = old_zone
+    end
 end