Fix issue #188 for embedded one relations

* Fix test to check Parent and Child updates

Fix: remove focus: true and debug info with puts

Fix tests: add method to track changes on update with changes

* Add method to track changes with changes empty

Author: Mateus Pontes

CHANGELOG.md

@@ -1,6 +1,7 @@
 ### 0.6.2 (Next)
 
 * Your contribution here.
+* [#191](https://github.com/mongoid/mongoid-history/pull/191): Track changes on embed_one - [@mateuspontes](https://github.com/mateuspontes).
 
 ### 0.6.1 (2017/01/04)
 

lib/mongoid/history/attributes/update.rb

@@ -13,6 +13,7 @@ def attributes
               @attributes[k] = format_field(k, v)
             end
           end
+          insert_embeds_one_changes_on_child if trackable_class.tracked_embeds_one.present? && changes.empty?
           @attributes
         end
 
@@ -27,6 +28,22 @@ def insert_embeds_one_changes(relation, value)
           @attributes[relation][1] = value[1][paranoia_field].present? ? {} : format_embeds_one_relation(relation, value[1])
         end
 
+        def insert_embeds_one_changes_on_child
+          trackable_class.tracked_embeds_one.each do |rel|
+            rel_class = trackable_class.embeds_one_class(rel)
+            paranoia_field = Mongoid::History.trackable_class_settings(rel_class)[:paranoia_field]
+            paranoia_field = rel_class.aliased_fields.key(paranoia_field) || paranoia_field
+            rel = aliased_fields.key(rel) || rel
+            obj = trackable.send(rel)
+            next if !obj || (obj.respond_to?(paranoia_field) && obj.public_send(paranoia_field).present?)
+            @attributes[rel] = {}
+            obj.changes.each do |k, v|
+              @attributes[rel] = [{ k => v.first }, { k => v.last }]
+            end
+          end
+          @attributes
+        end
+
         def insert_embeds_many_changes(relation, value)
           relation = trackable_class.database_field_name(relation)
           relation_class = trackable_class.embeds_many_class(relation)

spec/integration/nested_embedded_documents_tracked_in_parent_spec.rb

@@ -1,6 +1,6 @@
 require 'spec_helper'
 
-describe Mongoid::History::Tracker, focus: true do
+describe Mongoid::History::Tracker do
   before :all do
     # Child model (will be embedded in Parent)
     class Child
@@ -19,7 +19,7 @@ class Parent
       field :name, type: String
       embeds_one :child
 
-      track_history on: %i[(fields embedded_relations)],
+      track_history on: %i[fields embedded_relations],
                     version_field: :version,
                     track_create: true,
                     track_update: true,
@@ -37,10 +37,14 @@ class Parent
     expect(change.modified['name']).to eq('bowser')
     expect(change.modified['child']['name']).to eq('todd')
 
+    p.update_attributes(name: 'brow')
+    expect(p.history_tracks.length).to eq(2)
+
     p.child.name = 'mario'
     p.save!
 
-    expect(p.history_tracks.length).to eq(2)
+    expect(p.history_tracks.length).to eq(3)
+    expect(p.history_tracks.last.original['child']['name']).to eq('todd')
     expect(p.history_tracks.last.modified['child']['name']).to eq('mario')
   end