Expose epic inherited start and due date via GraphQL

doc/api/graphql/reference/index.md

@@ -8279,6 +8279,7 @@ Represents an epic on an issue board.
 | <a id="boardepicdownvotes"></a>`downvotes` | [`Int!`](#int) | Number of downvotes the epic has received. |
 | <a id="boardepicduedate"></a>`dueDate` | [`Time`](#time) | Due date of the epic. |
 | <a id="boardepicduedatefixed"></a>`dueDateFixed` | [`Time`](#time) | Fixed due date of the epic. |
+| <a id="boardepicduedatefrominheritedsource"></a>`dueDateFromInheritedSource` | [`Time`](#time) | Inherited due date of the epic from child epics or milestones. |
 | <a id="boardepicduedatefrommilestones"></a>`dueDateFromMilestones` | [`Time`](#time) | Inherited due date of the epic from milestones. |
 | <a id="boardepicduedateisfixed"></a>`dueDateIsFixed` | [`Boolean`](#boolean) | Indicates if the due date has been manually set. |
 | <a id="boardepicevents"></a>`events` | [`EventConnection`](#eventconnection) | List of events associated with the object. (see [Connections](#connections)) |
@@ -8298,6 +8299,7 @@ Represents an epic on an issue board.
 | <a id="boardepicrelativeposition"></a>`relativePosition` | [`Int`](#int) | Relative position of the epic in the epic tree. |
 | <a id="boardepicstartdate"></a>`startDate` | [`Time`](#time) | Start date of the epic. |
 | <a id="boardepicstartdatefixed"></a>`startDateFixed` | [`Time`](#time) | Fixed start date of the epic. |
+| <a id="boardepicstartdatefrominheritedsource"></a>`startDateFromInheritedSource` | [`Time`](#time) | Inherited start date of the epic from child epics or milestones. |
 | <a id="boardepicstartdatefrommilestones"></a>`startDateFromMilestones` | [`Time`](#time) | Inherited start date of the epic from milestones. |
 | <a id="boardepicstartdateisfixed"></a>`startDateIsFixed` | [`Boolean`](#boolean) | Indicates if the start date has been manually set. |
 | <a id="boardepicstate"></a>`state` | [`EpicState!`](#epicstate) | State of the epic. |
@@ -9691,6 +9693,7 @@ Represents an epic.
 | <a id="epicdownvotes"></a>`downvotes` | [`Int!`](#int) | Number of downvotes the epic has received. |
 | <a id="epicduedate"></a>`dueDate` | [`Time`](#time) | Due date of the epic. |
 | <a id="epicduedatefixed"></a>`dueDateFixed` | [`Time`](#time) | Fixed due date of the epic. |
+| <a id="epicduedatefrominheritedsource"></a>`dueDateFromInheritedSource` | [`Time`](#time) | Inherited due date of the epic from child epics or milestones. |
 | <a id="epicduedatefrommilestones"></a>`dueDateFromMilestones` | [`Time`](#time) | Inherited due date of the epic from milestones. |
 | <a id="epicduedateisfixed"></a>`dueDateIsFixed` | [`Boolean`](#boolean) | Indicates if the due date has been manually set. |
 | <a id="epicevents"></a>`events` | [`EventConnection`](#eventconnection) | List of events associated with the object. (see [Connections](#connections)) |
@@ -9710,6 +9713,7 @@ Represents an epic.
 | <a id="epicrelativeposition"></a>`relativePosition` | [`Int`](#int) | Relative position of the epic in the epic tree. |
 | <a id="epicstartdate"></a>`startDate` | [`Time`](#time) | Start date of the epic. |
 | <a id="epicstartdatefixed"></a>`startDateFixed` | [`Time`](#time) | Fixed start date of the epic. |
+| <a id="epicstartdatefrominheritedsource"></a>`startDateFromInheritedSource` | [`Time`](#time) | Inherited start date of the epic from child epics or milestones. |
 | <a id="epicstartdatefrommilestones"></a>`startDateFromMilestones` | [`Time`](#time) | Inherited start date of the epic from milestones. |
 | <a id="epicstartdateisfixed"></a>`startDateIsFixed` | [`Boolean`](#boolean) | Indicates if the start date has been manually set. |
 | <a id="epicstate"></a>`state` | [`EpicState!`](#epicstate) | State of the epic. |

ee/app/graphql/resolvers/epics_resolver.rb

@@ -96,7 +96,11 @@ module Resolvers
       {
         parent: [:parent],
         events: { events: [:target] },
-        award_emoji: [:award_emoji]
+        award_emoji: [:award_emoji],
+        start_date_from_milestones: [:start_date_sourcing_milestone],
+        start_date_from_inherited_source: [:start_date_sourcing_milestone, :start_date_sourcing_epic],
+        due_date_from_milestones: [:due_date_sourcing_milestone],
+        due_date_from_inherited_source: [:due_date_sourcing_milestone, :due_date_sourcing_epic]
       }
     end
 

ee/app/graphql/types/epic_type.rb

@@ -50,6 +50,9 @@ module Types
     field :start_date_from_milestones, Types::TimeType, null: true,
           description: 'Inherited start date of the epic from milestones.',
           authorize: :admin_epic
+    field :start_date_from_inherited_source, Types::TimeType, null: true,
+          description: 'Inherited start date of the epic from child epics or milestones.',
+          authorize: :admin_epic
 
     field :due_date, Types::TimeType, null: true,
           description: 'Due date of the epic.'
@@ -62,6 +65,9 @@ module Types
     field :due_date_from_milestones, Types::TimeType, null: true,
           description: 'Inherited due date of the epic from milestones.',
           authorize: :admin_epic
+    field :due_date_from_inherited_source, Types::TimeType, null: true,
+          description: 'Inherited due date of the epic from child epics or milestones.',
+          authorize: :admin_epic
 
     field :upvotes, GraphQL::Types::Int, null: false,
           description: 'Number of upvotes the epic has received.'

ee/app/models/ee/epic.rb

@@ -193,14 +193,10 @@ module EE
 
       def set_fixed_start_date
         self.start_date = start_date_fixed
-        self.start_date_sourcing_milestone = nil
-        self.due_date_sourcing_epic = nil
       end
 
       def set_fixed_due_date
         self.end_date = due_date_fixed
-        self.due_date_sourcing_milestone = nil
-        self.due_date_sourcing_epic = nil
       end
 
       def usage_ping_record_epic_creation

ee/spec/graphql/types/epic_type_spec.rb

@@ -7,9 +7,10 @@ RSpec.describe GitlabSchema.types['Epic'] do
     %i[
       id iid title titleHtml description descriptionHtml confidential state group
       parent author labels start_date start_date_is_fixed start_date_fixed
-      start_date_from_milestones due_date due_date_is_fixed due_date_fixed
-      due_date_from_milestones closed_at created_at updated_at children has_children
-      has_issues has_parent web_path web_url relation_path reference issues user_permissions
+      start_date_from_milestones start_date_from_inherited_source due_date
+      due_date_is_fixed due_date_fixed due_date_from_milestones due_date_from_inherited_source
+      closed_at created_at updated_at children has_children has_issues
+      has_parent web_path web_url relation_path reference issues user_permissions
       notes discussions relative_position subscribed participants
       descendant_counts descendant_weight_sum upvotes downvotes
       user_notes_count user_discussions_count health_status current_user_todos

ee/spec/models/epic_spec.rb

@@ -467,6 +467,20 @@ RSpec.describe Epic do
 
         expect(subject.start_date_from_milestones).to eq(milestone.start_date)
       end
+
+      it 'keeps start date sourcing milestone when switching to fixed dates' do
+        source_milestone = create(:milestone, :with_dates)
+        epic = create(:epic, start_date_sourcing_milestone: source_milestone, start_date_is_fixed: false)
+
+        expect { epic.update!(start_date_is_fixed: true) }.not_to change { epic.start_date_sourcing_milestone }
+      end
+
+      it 'keeps start date sourcing epic when switching to fixed dates' do
+        source_epic = create(:epic, start_date: Time.current)
+        epic = create(:epic, start_date_sourcing_epic: source_epic, start_date_is_fixed: false)
+
+        expect { epic.update!(start_date_is_fixed: true) }.not_to change { epic.start_date_sourcing_epic }
+      end
     end
 
     context 'milestone date' do
@@ -487,6 +501,20 @@ RSpec.describe Epic do
 
         expect(subject.due_date_from_milestones).to eq(milestone.due_date)
       end
+
+      it 'keeps due date sourcing milestone when switching to fixed dates' do
+        source_milestone = create(:milestone, :with_dates)
+        epic = create(:epic, due_date_sourcing_milestone: source_milestone, due_date_is_fixed: false)
+
+        expect { epic.update!(due_date_is_fixed: true) }.not_to change { epic.due_date_sourcing_milestone }
+      end
+
+      it 'keeps due date sourcing epic when switching to fixed dates' do
+        source_epic = create(:epic, due_date: Time.current)
+        epic = create(:epic, due_date_sourcing_epic: source_epic, due_date_is_fixed: false)
+
+        expect { epic.update!(due_date_is_fixed: true) }.not_to change { epic.due_date_sourcing_epic }
+      end
     end
 
     context 'milestone date' do