MONGOID-5508 touch on custom field

spec/mongoid/touchable_spec.rb

@@ -733,6 +733,81 @@
       end
     end
 
+    context "when a custom field is specified" do
+
+      shared_examples "updates the child's updated_at" do
+
+        let!(:start_time) { Timecop.freeze(Time.at(Time.now.to_i)) }
+
+        let(:update_time) { Timecop.freeze(Time.at(Time.now.to_i) + 2) }
+
+        after do
+          Timecop.return
+        end
+
+        let!(:label) do
+          TouchableSpec::Referenced::Label.create!
+        end
+
+        let(:band) do
+          TouchableSpec::Referenced::Band.create!(label: label)
+        end
+
+        before do
+          update_time
+          band.send(meth)
+        end
+
+        it "updates the child's timestamp" do
+          expect(band.updated_at).to eq(update_time)
+          expect(band.reload.updated_at).to eq(update_time)
+        end
+      end
+
+      shared_examples "updates the parent's custom field and updated_at" do
+
+        let!(:start_time) { Timecop.freeze(Time.at(Time.now.to_i)) }
+
+        let(:update_time) { Timecop.freeze(Time.at(Time.now.to_i) + 2) }
+
+        after do
+          Timecop.return
+        end
+
+        let!(:label) do
+          TouchableSpec::Referenced::Label.create!
+        end
+
+        let!(:band) do
+          TouchableSpec::Referenced::Band.create!(label: label)
+        end
+
+        before do
+          update_time
+          band.send(meth)
+        end
+
+        it "updates the parent's custom field" do
+          expect(label.bands_updated_at).to eq(update_time)
+          expect(label.reload.bands_updated_at).to eq(update_time)
+        end
+
+        it "updates the parent's timestamp" do
+          expect(label.updated_at).to eq(update_time)
+          expect(label.reload.updated_at).to eq(update_time)
+        end
+
+      end
+
+      [:save, :destroy, :touch].each do |meth|
+        context "with #{meth} on referenced associations" do
+          let(:meth) { meth }
+          include_examples "updates the child's updated_at" unless meth == :destroy
+          include_examples "updates the parent's custom field and updated_at"
+        end
+      end
+    end
+
     context 'multi-level' do
 
       let!(:start_time) { Timecop.freeze(Time.at(Time.now.to_i)) }

spec/mongoid/touchable_spec_models.rb

@@ -150,5 +150,21 @@ class Sofa
 
       embedded_in :floor, touch: true, class_name: "TouchableSpec::Referenced::Floor"
     end
+
+    class Label
+      include Mongoid::Document
+      include Mongoid::Timestamps
+
+      field :bands_updated_at, type: DateTime
+      has_many :bands, class_name: "TouchableSpec::Referenced::Band"
+    end
+
+    class Band
+      include Mongoid::Document
+      include Mongoid::Timestamps
+
+      belongs_to :label, touch: :bands_updated_at, class_name: "TouchableSpec::Referenced::Label"
+    end
+
   end
 end