Validate presence of requirement_issue

- Check requirement validation with context before
creating the requirement issue
- Update specs

ee/app/graphql/mutations/requirements_management/create_requirement.rb

@@ -19,10 +19,13 @@ module Mutations
           params: args
         ).execute
 
-        {
-          requirement: requirement.valid? ? requirement : nil,
-          errors: errors_on_object(requirement)
-        }
+        if requirement.errors.empty?
+          { requirement: requirement, errors: [] }
+        else
+          requirement.errors.delete(:requirement_issue)
+
+          { requirement: nil, errors: errors_on_object(requirement) }
+        end
       end
     end
   end

ee/app/models/requirements_management/requirement.rb

@@ -27,6 +27,9 @@ module RequirementsManagement
     # This will be removed in https://gitlab.com/gitlab-org/gitlab/-/issues/329432
     belongs_to :requirement_issue, class_name: 'Issue', foreign_key: :issue_id, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
 
+    validates :project, presence: true
+    validates :requirement_issue, presence: true, on: [:create, :update]
+
     validates :issue_id, uniqueness: true
 
     has_many :test_reports, inverse_of: :requirement
@@ -39,8 +42,6 @@ module RequirementsManagement
     after_validation :invalidate_if_sync_error, on: [:update, :create]
 
     delegate :title,
-             :project,
-             :project_id,
              :author,
              :author_id,
              :description,

ee/app/services/concerns/requirements_management/sync_with_requirement_issue.rb

@@ -9,10 +9,12 @@ module RequirementsManagement
   module SyncWithRequirementIssue
     def sync_issue_for(requirement)
       # We can't wrap the change in a Transaction (see https://gitlab.com/gitlab-org/gitlab/-/merge_requests/64929#note_647123684)
-      # so we'll check if both are valid before saving
-      if requirement.valid? && (requirement.requirement_issue || requirement.new_record?)
+      # so we'll check if both are valid before saving, we also pass special context
+      # to avoid validating requirement's issue presence which is not created yet
+      return unless requirement.valid?(:before_requirement_issue)
+
       attributes = attrs_to_sync(requirement)
-        return unless attributes.any?
+      return if !requirement.new_record? && attributes.empty?
 
       synced_issue = perform_sync(requirement, attributes)
       return synced_issue if synced_issue.valid?
@@ -28,7 +30,6 @@ module RequirementsManagement
 
       nil
     end
-    end
 
     def attrs_to_sync(requirement)
       sync_params = RequirementsManagement::Requirement.sync_params

ee/app/services/ee/issues/base_service.rb

@@ -233,7 +233,7 @@ module EE
         # so the sync happens even if the Requirements feature is no longer available via the license.
         requirement = issue.requirement || RequirementsManagement::Requirement.new
 
-        requirement.assign_attributes(sync_attrs)
+        requirement.assign_attributes(sync_attrs.merge(requirement_issue: issue))
 
         requirement if requirement.changed?
       end

ee/spec/models/requirements_management/requirement_spec.rb

@@ -21,8 +21,8 @@ RSpec.describe RequirementsManagement::Requirement do
     subject { build(:requirement) }
 
     delegated_attributes = %i[
-      project project_id author author_id title title_html
-      description description_html cached_markdown_version
+      author author_id title title_html description
+      description_html cached_markdown_version
     ]
 
     delegated_attributes.each do |attr_name|
@@ -32,7 +32,7 @@ RSpec.describe RequirementsManagement::Requirement do
     context 'with nil attributes' do
       let_it_be(:requirement) { create(:requirement, project: project, author: user, description: 'Test', state: 'archived') }
 
-      (delegated_attributes - %i[project project_id title]).each do |attr_name|
+      (delegated_attributes - [:title]).each do |attr_name|
         it "returns delegated #{attr_name} value" do
           requirement.update_attribute(attr_name, nil)
 
@@ -47,6 +47,8 @@ RSpec.describe RequirementsManagement::Requirement do
     subject { build(:requirement) }
 
     it { is_expected.to validate_uniqueness_of(:issue_id) }
+    it { is_expected.to validate_presence_of(:project) }
+    it { is_expected.to validate_presence_of(:requirement_issue) }
 
     it 'is limited to a unique requirement_issue' do
       requirement_issue = create(:requirement_issue)

ee/spec/services/requirements_management/create_requirement_service_spec.rb

@@ -54,9 +54,12 @@ RSpec.describe RequirementsManagement::CreateRequirementService do
         end
 
         context 'when creation of requirement fails' do
+          let_it_be(:requirement2) { create(:requirement, project: project, state: :opened, author: user) }
+
           it 'does not create issue' do
             allow_next_instance_of(RequirementsManagement::Requirement) do |instance|
               allow(instance).to receive(:valid?).and_return(false)
+              allow(instance).to receive(:valid?).with(:before_requirement_issue).and_return(false)
             end
 
             expect { subject }. to change { Issue.count }.by(0)
@@ -65,14 +68,22 @@ RSpec.describe RequirementsManagement::CreateRequirementService do
         end
 
         context 'when creation of issue fails' do
-          it 'does not create requirement' do
+          before do
             allow_next_instance_of(Issue) do |instance|
               allow(instance).to receive(:valid?).and_return(false)
             end
+          end
 
+          it 'does not create requirement' do
             expect { subject }. to change { Issue.count }.by(0)
               .and change { RequirementsManagement::Requirement.count }.by(0)
           end
+
+          it 'logs error' do
+            expect(::Gitlab::AppLogger).to receive(:info).with(a_hash_including(message: /Associated issue/))
+
+            subject
+          end
         end
       end
     end

ee/spec/services/requirements_management/update_requirement_service_spec.rb

@@ -190,18 +190,13 @@ RSpec.describe RequirementsManagement::UpdateRequirementService do
           end
         end
 
-        context 'if there is no requirement_issue' do
-          before do
-            requirement.update!(requirement_issue: nil)
-          end
-
-          it 'does not call the Issues::UpdateService' do
+        it 'does not call the Issues::UpdateService when requirement is invalid' do
+          requirement.project = nil
           expect(Issues::UpdateService).not_to receive(:new)
 
           subject
         end
       end
-      end
 
       context 'when updating last test report state' do
         context 'as passing' do