Allow sorting by title in REST/GraphQL API

Changelog: added
EE: true

doc/api/epics.md

@@ -64,7 +64,7 @@ GET /groups/:id/epics?state=opened
 | `author_id`         | integer          | no         | Return epics created by the given user `id`                                                                                 |
 | `labels`            | string           | no         | Return epics matching a comma separated list of labels names. Label names from the epic group or a parent group can be used |
 | `with_labels_details` | boolean        | no         | If `true`, response returns more details for each label in labels field: `:name`, `:color`, `:description`, `:description_html`, `:text_color`. Default is `false`. Available in [GitLab 12.7](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/21413) and later |
-| `order_by`          | string           | no         | Return epics ordered by `created_at` or `updated_at` fields. Default is `created_at`                                        |
+| `order_by`          | string           | no         | Return epics ordered by `created_at`, `updated_at`, or `title` fields. Default is `created_at`                              |
 | `sort`              | string           | no         | Return epics sorted in `asc` or `desc` order. Default is `desc`                                                             |
 | `search`            | string           | no         | Search epics against their `title` and `description`                                                                        |
 | `state`             | string           | no         | Search epics against their `state`, possible filters: `opened`, `closed` and `all`, default: `all`                          |

doc/api/graphql/reference/index.md

@@ -14232,6 +14232,8 @@ Roadmap sort values.
 | <a id="epicsortend_date_desc"></a>`END_DATE_DESC` | Sort by end date in descending order. |
 | <a id="epicsortstart_date_asc"></a>`START_DATE_ASC` | Sort by start date in ascending order. |
 | <a id="epicsortstart_date_desc"></a>`START_DATE_DESC` | Sort by start date in descending order. |
+| <a id="epicsorttitle_asc"></a>`TITLE_ASC` | Sort by title in ascending order. |
+| <a id="epicsorttitle_desc"></a>`TITLE_DESC` | Sort by title in descending order. |
 | <a id="epicsortend_date_asc"></a>`end_date_asc` **{warning-solid}** | **Deprecated** in 13.11. Use END_DATE_ASC. |
 | <a id="epicsortend_date_desc"></a>`end_date_desc` **{warning-solid}** | **Deprecated** in 13.11. Use END_DATE_DESC. |
 | <a id="epicsortstart_date_asc"></a>`start_date_asc` **{warning-solid}** | **Deprecated** in 13.11. Use START_DATE_ASC. |

ee/app/graphql/types/epic_sort_enum.rb

@@ -16,5 +16,7 @@ module Types
     value 'START_DATE_ASC', 'Sort by start date in ascending order.', value: :start_date_asc
     value 'END_DATE_DESC', 'Sort by end date in descending order.', value: :end_date_desc
     value 'END_DATE_ASC', 'Sort by end date in ascending order.', value: :end_date_asc
+    value 'TITLE_DESC', 'Sort by title in descending order.', value: :title_desc
+    value 'TITLE_ASC', 'Sort by title in ascending order.', value: :title_asc
   end
 end

ee/app/models/ee/epic.rb

@@ -112,6 +112,14 @@ module EE
         reorder(keyset_order)
       end
 
+      scope :order_title_asc, -> do
+        reorder(title: :asc)
+      end
+
+      scope :order_title_desc, -> do
+        reorder(title: :desc)
+      end
+
       scope :order_closed_date_desc, -> { reorder(closed_at: :desc) }
 
       scope :order_relative_position, -> do
@@ -179,6 +187,8 @@ module EE
         when 'start_date_desc' then order_start_date_desc
         when 'end_date_asc' then order_end_date_asc
         when 'end_date_desc' then order_end_date_desc
+        when 'title_asc' then order_title_asc
+        when 'title_desc' then order_title_desc
         else
           super
         end
@@ -256,6 +266,8 @@ module EE
         when 'end_date_asc' then order_end_date_asc
         when 'end_date_desc' then order_end_date_desc
         when 'relative_position' then order_relative_position
+        when 'title_asc' then order_title_asc
+        when 'title_desc' then order_title_desc
         else
           super
         end
@@ -268,7 +280,9 @@ module EE
             'start_date_asc' => -> { order_start_date_asc },
             'start_date_desc' => -> { order_start_date_desc },
             'end_date_asc' => -> { order_end_date_asc },
-            'end_date_desc' => -> { order_end_date_desc }
+            'end_date_desc' => -> { order_end_date_desc },
+            'title_asc' => -> { order_title_asc },
+            'title_desc' => -> { order_title_desc }
           }
         )
       end

ee/lib/api/epics.rb

@@ -22,8 +22,8 @@ module API
         success EE::API::Entities::Epic
       end
       params do
-        optional :order_by, type: String, values: %w[created_at updated_at], default: 'created_at',
-                            desc: 'Return epics ordered by `created_at` or `updated_at` fields.'
+        optional :order_by, type: String, values: %w[created_at updated_at title], default: 'created_at',
+                            desc: 'Return epics ordered by `created_at`, `updated_at` or `title` fields.'
         optional :sort, type: String, values: %w[asc desc], default: 'desc',
                         desc: 'Return epics sorted in `asc` or `desc` order.'
         optional :search, type: String, desc: 'Search epics for text present in the title or description'

ee/spec/graphql/resolvers/epics_resolver_spec.rb

@@ -180,29 +180,42 @@ RSpec.describe Resolvers::EpicsResolver do
         let!(:epic1) { create(:epic, group: group, title: 'first created', description: 'description', start_date: 10.days.ago, end_date: 10.days.from_now) }
         let!(:epic2) { create(:epic, group: group, title: 'second created', description: 'text 1', start_date: 20.days.ago, end_date: 20.days.from_now) }
         let!(:epic3) { create(:epic, group: group, title: 'third', description: 'text 2', start_date: 30.days.ago, end_date: 30.days.from_now) }
+        let!(:epic4) { create(:epic, group: group, title: 'forth created', description: 'four', start_date: 40.days.ago, end_date: 40.days.from_now) }
 
         it 'orders epics by start date in descending order' do
           epics = resolve_epics(sort: 'start_date_desc')
 
-          expect(epics).to eq([epic1, epic2, epic3])
+          expect(epics).to eq([epic1, epic2, epic3, epic4])
         end
 
         it 'orders epics by start date in ascending order' do
           epics = resolve_epics(sort: 'start_date_asc')
 
-          expect(epics).to eq([epic3, epic2, epic1])
+          expect(epics).to eq([epic4, epic3, epic2, epic1])
         end
 
         it 'orders epics by end date in descending order' do
           epics = resolve_epics(sort: 'end_date_desc')
 
-          expect(epics).to eq([epic3, epic2, epic1])
+          expect(epics).to eq([epic4, epic3, epic2, epic1])
         end
 
         it 'orders epics by end date in ascending order' do
           epics = resolve_epics(sort: 'end_date_asc')
 
-          expect(epics).to eq([epic1, epic2, epic3])
+          expect(epics).to eq([epic1, epic2, epic3, epic4])
+        end
+
+        it 'orders epics by title in descending order' do
+          epics = resolve_epics(sort: 'title_desc')
+
+          expect(epics).to eq([epic3, epic2, epic4, epic1])
+        end
+
+        it 'orders epics by title in ascending order' do
+          epics = resolve_epics(sort: 'title_asc')
+
+          expect(epics).to eq([epic1, epic4, epic2, epic3])
         end
       end
 

ee/spec/graphql/types/epic_sort_enum_spec.rb

@@ -6,6 +6,6 @@ RSpec.describe GitlabSchema.types['EpicSort'] do
   it { expect(described_class.graphql_name).to eq('EpicSort') }
 
   it 'exposes all the existing epic sort orders' do
-    expect(described_class.values.keys).to include(*%w[start_date_desc start_date_asc end_date_desc end_date_asc])
+    expect(described_class.values.keys).to include(*%w[start_date_desc start_date_asc end_date_desc end_date_asc START_DATE_DESC START_DATE_ASC END_DATE_DESC END_DATE_ASC TITLE_DESC TITLE_ASC])
   end
 end

ee/spec/models/epic_spec.rb

@@ -87,6 +87,24 @@ RSpec.describe Epic do
       end
     end
 
+    describe 'title sort scopes' do
+      let_it_be(:epic1) { create(:epic, title: 'foo') }
+      let_it_be(:epic2) { create(:epic, title: 'bar') }
+      let_it_be(:epic3) { create(:epic, title: 'baz') }
+
+      describe '.order_title_asc' do
+        it 'returns epics ordered by title, ascending' do
+          expect(described_class.order_title_asc).to eq([epic2, epic3, epic1, confidential_epic, public_epic])
+        end
+
+        describe '.order_title_desc' do
+          it 'returns epics ordered by title, decending' do
+            expect(described_class.order_title_desc).to eq([public_epic, confidential_epic, epic1, epic3, epic2])
+          end
+        end
+      end
+    end
+
     describe '.in_milestone' do
       let_it_be(:milestone) { create(:milestone, project: project) }
 
@@ -182,10 +200,10 @@ RSpec.describe Epic do
   end
 
   describe 'ordering' do
-    let!(:epic1) { create(:epic, start_date: 7.days.ago, end_date: 3.days.ago, updated_at: 3.days.ago, created_at: 7.days.ago, relative_position: 3) }
-    let!(:epic2) { create(:epic, start_date: 3.days.ago, updated_at: 10.days.ago, created_at: 12.days.ago, relative_position: 1) }
-    let!(:epic3) { create(:epic, end_date: 5.days.ago, updated_at: 5.days.ago, created_at: 6.days.ago, relative_position: 2) }
-    let!(:epic4) { create(:epic, relative_position: 4) }
+    let!(:epic1) { create(:epic, start_date: 7.days.ago, end_date: 3.days.ago, updated_at: 3.days.ago, created_at: 7.days.ago, relative_position: 3, title: 'foo') }
+    let!(:epic2) { create(:epic, start_date: 3.days.ago, updated_at: 10.days.ago, created_at: 12.days.ago, relative_position: 1, title: 'bar') }
+    let!(:epic3) { create(:epic, end_date: 5.days.ago, updated_at: 5.days.ago, created_at: 6.days.ago, relative_position: 2, title: 'baz') }
+    let!(:epic4) { create(:epic, relative_position: 4, title: 'world') }
 
     def epics(order_by)
       described_class.order_by(order_by)
@@ -230,6 +248,14 @@ RSpec.describe Epic do
     it 'orders by relative_position ASC' do
       expect(epics(:relative_position)).to eq([epic2, epic3, epic1, epic4])
     end
+
+    it 'orders by title ASC' do
+      expect(epics(:title_asc)).to eq([epic2, epic3, epic1, epic4])
+    end
+
+    it 'orders by title DESC' do
+      expect(epics(:title_desc)).to eq([epic4, epic1, epic3, epic2])
+    end
   end
 
   describe '#valid_parent?' do

ee/spec/requests/api/epics_spec.rb

@@ -160,6 +160,7 @@ RSpec.describe API::Epics do
       let!(:epic) do
         create(:epic,
                group: group,
+               title: 'baz',
                state: :closed,
                created_at: 3.days.ago,
                updated_at: 2.days.ago)
@@ -269,6 +270,18 @@ RSpec.describe API::Epics do
         expect_paginated_array_response([epic2.id, epic.id])
       end
 
+      it 'sorts by title descending when requested' do
+        get api(url), params: { order_by: :title }
+
+        expect_paginated_array_response([epic2.id, epic.id])
+      end
+
+      it 'sorts by title ascending when requested' do
+        get api(url), params: { order_by: :title, sort: :asc }
+
+        expect_paginated_array_response([epic.id, epic2.id])
+      end
+
       it 'returns an array of labeled epics' do
         get api(url), params: { labels: label.title }