GraphQL: Add projects property to CiRunner type

Changelog: added

app/graphql/types/ci/runner_type.rb

@@ -65,6 +65,8 @@ module Types
             feature_flag: :graphql_ci_runner_executor
       field :groups, ::Types::GroupType.connection_type, null: true,
             description: 'Groups the runner is associated with. For group runners only.'
+      field :projects, ::Types::ProjectType.connection_type, null: true,
+            description: 'Projects the runner is associated with. For project runners only.'
 
       def job_count
         # We limit to 1 above the JOB_COUNT_LIMIT to indicate that more items exist after JOB_COUNT_LIMIT
@@ -112,6 +114,26 @@ module Types
           end
         end
       end
+
+      def projects
+        return unless runner.project_type?
+
+        BatchLoader::GraphQL.for(runner.id).batch(key: :runner_projects) do |runner_ids, loader, args|
+          runner_and_project_ids =
+            ::Ci::RunnerProject
+              .where(runner_id: runner_ids)
+              .pluck(:runner_id, :project_id)
+
+          project_ids_by_runner_id = runner_and_project_ids.group_by(&:first).transform_values { |v| v.pluck(1) }
+          project_ids = runner_and_project_ids.pluck(1).uniq
+
+          projects = Project.where(id: project_ids).index_by(&:id)
+
+          runner_ids.each do |runner_id|
+            loader.call(runner_id, project_ids_by_runner_id[runner_id]&.map { |project_id| projects[project_id] } || [])
+          end
+        end
+      end
       # rubocop: enable CodeReuse/ActiveRecord
 
       private

doc/api/graphql/reference/index.md

@@ -9030,6 +9030,7 @@ Represents the total number of issues and their weights for a particular day.
 | <a id="cirunnermaximumtimeout"></a>`maximumTimeout` | [`Int`](#int) | Maximum timeout (in seconds) for jobs processed by the runner. |
 | <a id="cirunnerprivateprojectsminutescostfactor"></a>`privateProjectsMinutesCostFactor` | [`Float`](#float) | Private projects' "minutes cost factor" associated with the runner (GitLab.com only). |
 | <a id="cirunnerprojectcount"></a>`projectCount` | [`Int`](#int) | Number of projects that the runner is associated with. |
+| <a id="cirunnerprojects"></a>`projects` | [`ProjectConnection`](#projectconnection) | Projects the runner is associated with. For project runners only. (see [Connections](#connections)) |
 | <a id="cirunnerpublicprojectsminutescostfactor"></a>`publicProjectsMinutesCostFactor` | [`Float`](#float) | Public projects' "minutes cost factor" associated with the runner (GitLab.com only). |
 | <a id="cirunnerrevision"></a>`revision` | [`String`](#string) | Revision of the runner. |
 | <a id="cirunnerrununtagged"></a>`runUntagged` | [`Boolean!`](#boolean) | Indicates the runner is able to run untagged jobs. |

spec/graphql/types/ci/runner_type_spec.rb

@@ -12,7 +12,7 @@ RSpec.describe GitlabSchema.types['CiRunner'] do
       id description created_at contacted_at maximum_timeout access_level active status
       version short_sha revision locked run_untagged ip_address runner_type tag_list
       project_count job_count admin_url edit_admin_url user_permissions executor_name
-      groups
+      groups projects
     ]
 
     expect(described_class).to include_graphql_fields(*expected_fields)

spec/requests/api/graphql/ci/runner_spec.rb

@@ -302,21 +302,36 @@ RSpec.describe 'Query.runner(id)' do
 
     let!(:job) { create(:ci_build, runner: project_runner1) }
 
-    context 'requesting project and job counts' do
+    context 'requesting projects and counts for projects and jobs' do
       let(:query) do
         %(
           query {
             projectRunner1: runner(id: "#{project_runner1.to_global_id}") {
               projectCount
               jobCount
+              projects {
+                nodes {
+                  id
+                }
+              }
             }
             projectRunner2: runner(id: "#{project_runner2.to_global_id}") {
               projectCount
               jobCount
+              projects {
+                nodes {
+                  id
+                }
+              }
             }
             activeInstanceRunner: runner(id: "#{active_instance_runner.to_global_id}") {
               projectCount
               jobCount
+              projects {
+                nodes {
+                  id
+                }
+              }
             }
           }
         )
@@ -335,13 +350,23 @@ RSpec.describe 'Query.runner(id)' do
 
         expect(runner1_data).to match a_hash_including(
           'jobCount' => 1,
-          'projectCount' => 2)
+          'projectCount' => 2,
+          'projects' => {
+            'nodes' => [
+              { 'id' => project1.to_global_id.to_s },
+              { 'id' => project2.to_global_id.to_s }
+            ]
+          })
         expect(runner2_data).to match a_hash_including(
           'jobCount' => 0,
-          'projectCount' => 0)
+          'projectCount' => 0,
+          'projects' => {
+            'nodes' => []
+          })
         expect(runner3_data).to match a_hash_including(
           'jobCount' => 0,
-          'projectCount' => nil)
+          'projectCount' => nil,
+          'projects' => nil)
       end
     end
   end