Add pipeline to CI job GraphQL type

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/47347

app/graphql/types/ci/job_type.rb

@@ -6,6 +6,9 @@ module Types
     class JobType < BaseObject
       graphql_name 'CiJob'
 
+      field :pipeline, Types::Ci::PipelineType, null: false,
+        description: 'Pipeline the job belongs to',
+        resolve: -> (build, _, _) { Gitlab::Graphql::Loaders::BatchModelLoader.new(::Ci::Pipeline, build.pipeline_id).find }
       field :name, GraphQL::STRING_TYPE, null: true,
         description: 'Name of the job'
       field :needs, JobType.connection_type, null: true,

changelogs/unreleased/267168-add-pipeline-to-ci-job-type.yml

+---
+title: Add pipeline to CI job GraphQL type
+merge_request: 47347
+author:
+type: added

doc/api/graphql/reference/gitlab_schema.graphql

@@ -2325,6 +2325,11 @@ type CiJob {
     last: Int
   ): CiJobConnection
 
+  """
+  Pipeline the job belongs to
+  """
+  pipeline: Pipeline!
+
   """
   Schedule for the build
   """

doc/api/graphql/reference/gitlab_schema.json

@@ -6240,6 +6240,24 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "pipeline",
+              "description": "Pipeline the job belongs to",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "OBJECT",
+                  "name": "Pipeline",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "scheduledAt",
               "description": "Schedule for the build",

doc/api/graphql/reference/index.md

@@ -379,6 +379,7 @@ Represents the total number of issues and their weights for a particular day.
 | `detailedStatus` | DetailedStatus | Detailed status of the job |
 | `name` | String | Name of the job |
 | `needs` | CiJobConnection | Builds that must complete before the jobs run |
+| `pipeline` | Pipeline! | Pipeline the job belongs to |
 | `scheduledAt` | Time | Schedule for the build |
 
 ### CiStage

spec/graphql/types/ci/job_type_spec.rb

@@ -7,6 +7,7 @@ RSpec.describe Types::Ci::JobType do
 
   it 'exposes the expected fields' do
     expected_fields = %i[
+      pipeline
       name
       needs
       detailedStatus

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

@@ -34,6 +34,9 @@ RSpec.describe 'Query.project.pipeline.stages.groups.jobs' do
                     jobs {
                       nodes {
                         name
+                        pipeline {
+                          id
+                        }
                       }
                     }
                   }
@@ -53,7 +56,7 @@ RSpec.describe 'Query.project.pipeline.stages.groups.jobs' do
   end
 
   context 'when fetching jobs from the pipeline' do
-    it 'avoids N+1 queries' do
+    it 'avoids N+1 queries', :aggregate_failures do
       control_count = ActiveRecord::QueryRecorder.new do
         post_graphql(query, current_user: user)
       end
@@ -86,8 +89,27 @@ RSpec.describe 'Query.project.pipeline.stages.groups.jobs' do
       docker_jobs = docker_group.dig('jobs', 'nodes')
       rspec_jobs = rspec_group.dig('jobs', 'nodes')
 
-      expect(docker_jobs).to eq([{ 'name' => 'docker 1 2' }, { 'name' => 'docker 2 2' }])
-      expect(rspec_jobs).to eq([{ 'name' => 'rspec 1 2' }, { 'name' => 'rspec 2 2' }])
+      expect(docker_jobs).to eq([
+        {
+          'name' => 'docker 1 2',
+          'pipeline' => { 'id' => pipeline.to_global_id.to_s }
+        },
+        {
+          'name' => 'docker 2 2',
+          'pipeline' => { 'id' => pipeline.to_global_id.to_s }
+        }
+      ])
+
+      expect(rspec_jobs).to eq([
+        {
+          'name' => 'rspec 1 2',
+          'pipeline' => { 'id' => pipeline.to_global_id.to_s }
+        },
+        {
+          'name' => 'rspec 2 2',
+          'pipeline' => { 'id' => pipeline.to_global_id.to_s }
+        }
+      ])
     end
   end
 end