Preserve epic labels association during Group Import/Export

  - Fix a bug in Group Import/Export where epics would
    lose their labels association on import. Add epic
    labels export as well as preserve them on import.

Changelog: fixed

ee/changelogs/unreleased/georgekoltsov-import-export-epic-labels.yml

+---
+title: Preserve epic labels association during Group Import/Export
+merge_request: 62074
+author:
+type: fixed

ee/spec/fixtures/lib/gitlab/import_export/group_exports/light/group.json

@@ -87,7 +87,11 @@
       "updated_at": "2019-11-20T17:27:41.118Z",
       "name": "first board",
       "milestone_id": -2,
-      "milestone": {"id": -2, "name":  "#upcoming", "title":  "Upcoming"},
+      "milestone": {
+        "id": -2,
+        "name": "#upcoming",
+        "title": "Upcoming"
+      },
       "group_id": 4351,
       "weight": null,
       "labels": [],
@@ -289,6 +293,24 @@
           "created_at": "2019-11-05T15:37:21.287Z",
           "updated_at": "2019-11-05T15:37:21.287Z"
         }
+      ],
+      "label_links": [
+        {
+          "id": 1,
+          "label_id": 2,
+          "target_id": 3,
+          "target_type": "Epic",
+          "created_at": "2021-04-14 14:42:21.717503",
+          "updated_at": "2021-04-14 14:42:21.717503",
+          "label": {
+            "title": "title",
+            "description": "description",
+            "color": "#cd2c5c",
+            "created_at": "2021-04-14 14:42:21.717503",
+            "updated_at": "2021-04-14 14:42:21.717503",
+            "type": "GroupLabel"
+          }
+        }
       ]
     },
     {
@@ -321,7 +343,25 @@
       "state": "closed",
       "start_date_sourcing_epic_id": null,
       "due_date_sourcing_epic_id": null,
-      "notes": []
+      "notes": [],
+      "label_links": [
+        {
+          "id": 1,
+          "label_id": 2,
+          "target_id": 3,
+          "target_type": "Epic",
+          "created_at": "2021-04-14 14:42:21.717503",
+          "updated_at": "2021-04-14 14:42:21.717503",
+          "label": {
+            "title": "title",
+            "description": "description",
+            "color": "#cd2c5c",
+            "created_at": "2021-04-14 14:42:21.717503",
+            "updated_at": "2021-04-14 14:42:21.717503",
+            "type": "GroupLabel"
+          }
+        }
+      ]
     }
   ]
 }

ee/spec/fixtures/lib/gitlab/import_export/group_exports/light/tree/groups/761/epics.ndjson

-{"id":13622,"milestone_id":null,"group_id":4351,"author_id":1,"assignee_id":null,"iid":1,"updated_by_id":null,"last_edited_by_id":null,"lock_version":0,"start_date":null,"end_date":null,"last_edited_at":null,"created_at":"2019-11-20T17:02:09.754Z","updated_at":"2019-11-20T18:38:40.054Z","title":"Provident neque consequatur numquam ad laboriosam voluptatem magnam.","description":"Fugit nisi est ut numquam quia rerum vitae qui. Et in est aliquid voluptas et ut vitae. In distinctio voluptates ut deleniti iste.\n\nReiciendis eum sunt vero blanditiis at quia. Voluptate eum facilis illum ea distinctio maiores. Doloribus aut nemo ea distinctio.\n\nNihil cum distinctio voluptates quam. Laboriosam distinctio ea accusantium soluta perspiciatis nesciunt impedit. Id qui natus quis minima voluptatum velit ut reprehenderit. Molestiae quia est harum sapiente rem error architecto id. Et minus ipsa et ut ut.","start_date_sourcing_milestone_id":null,"due_date_sourcing_milestone_id":null,"start_date_fixed":null,"due_date_fixed":null,"start_date_is_fixed":null,"due_date_is_fixed":null,"closed_by_id":null,"closed_at":null,"parent_id":null,"relative_position":null,"state":"opened","start_date_sourcing_epic_id":null,"due_date_sourcing_epic_id":null,"notes":[{"id":44164,"note":"added epic &2 as child epic","noteable_type":"Epic","author_id":1,"created_at":"2019-11-20T18:38:26.689Z","updated_at":"2019-11-20T18:38:26.724Z","project_id":null,"attachment":{"url":null},"line_code":null,"commit_id":null,"noteable_id":13622,"system":true,"st_diff":null,"updated_by_id":null,"position":null,"original_position":null,"resolved_at":null,"resolved_by_id":null,"discussion_id":"133f0c3001860fa8d2031e398a65db74477378c4","change_position":null,"resolved_by_push":null,"review_id":null,"type":null,"author":{"name":"Administrator"},"award_emoji":[{"id":12,"name":"drum","user_id":1,"awardable_type":"Note","awardable_id":44170,"created_at":"2019-11-05T15:32:21.287Z","updated_at":"2019-11-05T15:32:21.287Z"}]}],"award_emoji":[{"id":12,"name":"thumbsup","user_id":1,"awardable_type":"Epic","awardable_id":13622,"created_at":"2019-11-05T15:37:21.287Z","updated_at":"2019-11-05T15:37:21.287Z"}]}
-{"id":13623,"milestone_id":null,"group_id":4351,"author_id":1,"assignee_id":null,"iid":2,"updated_by_id":null,"last_edited_by_id":null,"lock_version":0,"start_date":null,"end_date":null,"last_edited_at":null,"created_at":"2019-12-20T17:02:09.754Z","updated_at":"2019-12-20T18:38:40.054Z","title":"Provident neque consequatur numquam ad voluptatem magnam.","description":"Fugit nisi","start_date_sourcing_milestone_id":null,"due_date_sourcing_milestone_id":null,"start_date_fixed":null,"due_date_fixed":null,"start_date_is_fixed":null,"due_date_is_fixed":null,"closed_by_id":null,"closed_at":null,"parent_id":null,"relative_position":null,"state":"closed","start_date_sourcing_epic_id":null,"due_date_sourcing_epic_id":null,"notes":[]}
+{"id":13622,"milestone_id":null,"group_id":4351,"author_id":1,"assignee_id":null,"iid":1,"updated_by_id":null,"last_edited_by_id":null,"lock_version":0,"start_date":null,"end_date":null,"last_edited_at":null,"created_at":"2019-11-20T17:02:09.754Z","updated_at":"2019-11-20T18:38:40.054Z","title":"Provident neque consequatur numquam ad laboriosam voluptatem magnam.","description":"Fugit nisi est ut numquam quia rerum vitae qui. Et in est aliquid voluptas et ut vitae. In distinctio voluptates ut deleniti iste.\n\nReiciendis eum sunt vero blanditiis at quia. Voluptate eum facilis illum ea distinctio maiores. Doloribus aut nemo ea distinctio.\n\nNihil cum distinctio voluptates quam. Laboriosam distinctio ea accusantium soluta perspiciatis nesciunt impedit. Id qui natus quis minima voluptatum velit ut reprehenderit. Molestiae quia est harum sapiente rem error architecto id. Et minus ipsa et ut ut.","start_date_sourcing_milestone_id":null,"due_date_sourcing_milestone_id":null,"start_date_fixed":null,"due_date_fixed":null,"start_date_is_fixed":null,"due_date_is_fixed":null,"closed_by_id":null,"closed_at":null,"parent_id":null,"relative_position":null,"state":"opened","start_date_sourcing_epic_id":null,"due_date_sourcing_epic_id":null,"notes":[{"id":44164,"note":"added epic &2 as child epic","noteable_type":"Epic","author_id":1,"created_at":"2019-11-20T18:38:26.689Z","updated_at":"2019-11-20T18:38:26.724Z","project_id":null,"attachment":{"url":null},"line_code":null,"commit_id":null,"noteable_id":13622,"system":true,"st_diff":null,"updated_by_id":null,"position":null,"original_position":null,"resolved_at":null,"resolved_by_id":null,"discussion_id":"133f0c3001860fa8d2031e398a65db74477378c4","change_position":null,"resolved_by_push":null,"review_id":null,"type":null,"author":{"name":"Administrator"},"award_emoji":[{"id":12,"name":"drum","user_id":1,"awardable_type":"Note","awardable_id":44170,"created_at":"2019-11-05T15:32:21.287Z","updated_at":"2019-11-05T15:32:21.287Z"}]}],"award_emoji":[{"id":12,"name":"thumbsup","user_id":1,"awardable_type":"Epic","awardable_id":13622,"created_at":"2019-11-05T15:37:21.287Z","updated_at":"2019-11-05T15:37:21.287Z"}],"label_links":[{"id":1,"label_id":2,"target_id":3,"target_type":"Epic","created_at":"2021-04-14 14:42:21.717503","updated_at":"2021-04-14 14:42:21.717503","label":{"title":"title","description":"description","color":"#cd2c5c","created_at":"2021-04-14 14:42:21.717503","updated_at":"2021-04-14 14:42:21.717503","type":"GroupLabel"}}]}
+{"id":13623,"milestone_id":null,"group_id":4351,"author_id":1,"assignee_id":null,"iid":2,"updated_by_id":null,"last_edited_by_id":null,"lock_version":0,"start_date":null,"end_date":null,"last_edited_at":null,"created_at":"2019-12-20T17:02:09.754Z","updated_at":"2019-12-20T18:38:40.054Z","title":"Provident neque consequatur numquam ad voluptatem magnam.","description":"Fugit nisi","start_date_sourcing_milestone_id":null,"due_date_sourcing_milestone_id":null,"start_date_fixed":null,"due_date_fixed":null,"start_date_is_fixed":null,"due_date_is_fixed":null,"closed_by_id":null,"closed_at":null,"parent_id":null,"relative_position":null,"state":"closed","start_date_sourcing_epic_id":null,"due_date_sourcing_epic_id":null,"notes":[],"label_links":[{"id":1,"label_id":2,"target_id":3,"target_type":"Epic","created_at":"2021-04-14 14:42:21.717503","updated_at":"2021-04-14 14:42:21.717503","label":{"title":"title","description":"description","color":"#cd2c5c","created_at":"2021-04-14 14:42:21.717503","updated_at":"2021-04-14 14:42:21.717503","type":"GroupLabel"}}]}

ee/spec/lib/ee/gitlab/import_export/group/legacy_tree_restorer_spec.rb

@@ -44,6 +44,17 @@ RSpec.describe Gitlab::ImportExport::Group::LegacyTreeRestorer do
       end
     end
 
+    context 'epic labels' do
+      it 'has epic labels' do
+        label = group.epics.first.labels.first
+
+        expect(group.epics.first.labels.count).to eq(1)
+        expect(label.title).to eq('title')
+        expect(label.description).to eq('description')
+        expect(label.color).to eq('#cd2c5c')
+      end
+    end
+
     context 'board lists' do
       it 'has milestone & assignee lists' do
         lists = group.boards.find_by(name: 'first board').lists

ee/spec/lib/ee/gitlab/import_export/group/legacy_tree_saver_spec.rb

@@ -10,6 +10,7 @@ RSpec.describe Gitlab::ImportExport::Group::LegacyTreeSaver do
     let_it_be(:parent_epic) { create(:epic, group: group) }
     let_it_be(:epic) { create(:epic, group: group, parent: parent_epic) }
     let_it_be(:epic_event) { create(:event, :created, target: epic, group: group, author: user) }
+    let_it_be(:epic_label_link) { create(:label_link, label: label, target: epic) }
     let_it_be(:epic_push_event) { create(:event, :pushed, target: epic, group: group, author: user) }
     let_it_be(:milestone) { create(:milestone, group: group) }
     let_it_be(:board) { create(:board, group: group, assignee: user, labels: [label]) }
@@ -99,6 +100,15 @@ RSpec.describe Gitlab::ImportExport::Group::LegacyTreeSaver do
         award_emoji = epic_json['notes'].first['award_emoji'].first
         expect(award_emoji['name']).to eq(epic_note_emoji.name)
       end
+
+      it 'saves epic labels' do
+        expect_successful_save(group_tree_saver)
+
+        epic_label = epic_json['label_links'].first['label']
+        expect(epic_label['title']).to eq(label.title)
+        expect(epic_label['description']).to eq(label.description)
+        expect(epic_label['color']).to eq(label.color)
+      end
     end
 
     context 'boards relation' do

ee/spec/lib/ee/gitlab/import_export/group/tree_restorer_spec.rb

@@ -44,6 +44,17 @@ RSpec.describe Gitlab::ImportExport::Group::TreeRestorer do
       end
     end
 
+    context 'epic labels' do
+      it 'has epic labels' do
+        label = group.epics.first.labels.first
+
+        expect(group.epics.first.labels.count).to eq(1)
+        expect(label.title).to eq('title')
+        expect(label.description).to eq('description')
+        expect(label.color).to eq('#cd2c5c')
+      end
+    end
+
     context 'board lists' do
       it 'has milestone & assignee lists' do
         lists = group.boards.find_by(name: 'first board').lists

ee/spec/lib/ee/gitlab/import_export/group/tree_saver_spec.rb

@@ -10,6 +10,7 @@ RSpec.describe Gitlab::ImportExport::Group::TreeSaver do
     let_it_be(:parent_epic) { create(:epic, group: group) }
     let_it_be(:epic) { create(:epic, group: group, parent: parent_epic) }
     let_it_be(:epic_event) { create(:event, :created, target: epic, group: group, author: user) }
+    let_it_be(:epic_label_link) { create(:label_link, label: label, target: epic) }
     let_it_be(:epic_push_event) { create(:event, :pushed, target: epic, group: group, author: user) }
     let_it_be(:milestone) { create(:milestone, group: group) }
     let_it_be(:board) { create(:board, group: group, assignee: user, labels: [label]) }
@@ -97,6 +98,15 @@ RSpec.describe Gitlab::ImportExport::Group::TreeSaver do
         award_emoji = epic_json['notes'].first['award_emoji'].first
         expect(award_emoji['name']).to eq(epic_note_emoji.name)
       end
+
+      it 'saves epic labels' do
+        expect_successful_save(group_tree_saver)
+
+        epic_label = epic_json['label_links'].first['label']
+        expect(epic_label['title']).to eq(label.title)
+        expect(epic_label['description']).to eq(label.description)
+        expect(epic_label['color']).to eq(label.color)
+      end
     end
 
     context 'boards relation' do

lib/gitlab/import_export/group/import_export.yml

@@ -70,6 +70,8 @@ ee:
         - :award_emoji
         - events:
           - :push_event_payload
+        - label_links:
+          - :label
         - notes:
           - :author
           - :award_emoji

lib/gitlab/import_export/group/legacy_import_export.yml

@@ -72,6 +72,8 @@ ee:
         - :award_emoji
         - events:
           - :push_event_payload
+        - label_links:
+          - :label
         - notes:
           - :author
           - :award_emoji