Adds scheduling_type to Job and UsesNeeds to Pipeline

* Also adds a uses_needs? method to Ci::Pipeline

app/graphql/types/ci/job_type.rb

@@ -45,6 +45,8 @@ module Types
             description: 'Artifacts generated by the job.'
       field :short_sha, type: GraphQL::STRING_TYPE, null: false,
             description: 'Short SHA1 ID of the commit.'
+      field :scheduling_type, GraphQL::STRING_TYPE, null: true,
+            description: 'Type of pipeline scheduling. Value is `dag` if the pipeline uses the `needs` keyword, and `stage` otherwise.'
 
       def pipeline
         Gitlab::Graphql::Loaders::BatchModelLoader.new(::Ci::Pipeline, object.pipeline_id).find

app/graphql/types/ci/pipeline_type.rb

@@ -118,6 +118,10 @@ module Types
       field :active, GraphQL::BOOLEAN_TYPE, null: false, method: :active?,
             description: 'Indicates if the pipeline is active.'
 
+      field :uses_needs, GraphQL::BOOLEAN_TYPE, null: true,
+            method: :uses_needs?,
+            description: 'Indicates if the pipeline has jobs with `needs` dependencies.'
+
       def detailed_status
         object.detailed_status(current_user)
       end

app/models/ci/pipeline.rb

@@ -446,6 +446,10 @@ module Ci
       @auto_devops_pipelines_completed_total ||= Gitlab::Metrics.counter(:auto_devops_pipelines_completed_total, 'Number of completed auto devops pipelines')
     end
 
+    def uses_needs?
+      builds.where(scheduling_type: :dag).any?
+    end
+
     def stages_count
       statuses.select(:stage).distinct.count
     end

changelogs/unreleased/lm-add-scheduling-type-to-job.yml

+---
+title: Exposes schedulingType on CiJobType and adds usesNeeds to PipelineType
+merge_request: 57398
+author:
+type: added

doc/api/graphql/reference/index.md

@@ -1216,6 +1216,7 @@ An edge in a connection.
 | `pipeline` | [`Pipeline`](#pipeline) | Pipeline the job belongs to. |
 | `queuedAt` | [`Time`](#time) | When the job was enqueued and marked as pending. |
 | `scheduledAt` | [`Time`](#time) | Schedule for the build. |
+| `schedulingType` | [`String`](#string) | Type of pipeline scheduling. Value is `dag` if the pipeline uses the `needs` keyword, and `stage` otherwise. |
 | `shortSha` | [`String!`](#string) | Short SHA1 ID of the commit. |
 | `stage` | [`CiStage`](#cistage) | Stage of the job. |
 | `startedAt` | [`Time`](#time) | When the job was started. |
@@ -4618,6 +4619,7 @@ Information about pagination in a connection.
 | `upstream` | [`Pipeline`](#pipeline) | Pipeline that triggered the pipeline. |
 | `user` | [`User`](#user) | Pipeline user. |
 | `userPermissions` | [`PipelinePermissions!`](#pipelinepermissions) | Permissions for the current user on the resource. |
+| `usesNeeds` | [`Boolean`](#boolean) | Indicates if the pipeline has jobs with `needs` dependencies. |
 | `warnings` | [`Boolean!`](#boolean) | Indicates if a pipeline has warnings. |
 
 ### `PipelineAnalytics`

spec/graphql/types/ci/job_type_spec.rb

@@ -20,7 +20,7 @@ RSpec.describe Types::Ci::JobType do
       pipeline
       queued_at
       scheduledAt
-      scheduledAt
+      schedulingType
       shortSha
       stage
       started_at

spec/graphql/types/ci/pipeline_type_spec.rb

@@ -11,8 +11,8 @@ RSpec.describe Types::Ci::PipelineType do
     expected_fields = %w[
       id iid sha before_sha status detailed_status config_source duration
       coverage created_at updated_at started_at finished_at committed_at
-      stages user retryable cancelable jobs job source_job downstream
-      upstream path project active user_permissions warnings commit_path
+      stages user retryable cancelable jobs source_job job downstream
+      upstream path project active user_permissions warnings commit_path uses_needs
     ]
 
     if Gitlab.ee?

spec/models/ci/pipeline_spec.rb

@@ -3782,6 +3782,26 @@ RSpec.describe Ci::Pipeline, :mailer, factory_default: :keep do
     end
   end
 
+  describe '#uses_needs?' do
+    let_it_be(:pipeline) { create(:ci_pipeline) }
+
+    context 'when the scheduling type is `dag`' do
+      it 'returns true' do
+        create(:ci_build, pipeline: pipeline, scheduling_type: :dag)
+
+        expect(pipeline.uses_needs?).to eq(true)
+      end
+    end
+
+    context 'when the scheduling type is nil or stage' do
+      it 'returns false' do
+        create(:ci_build, pipeline: pipeline, scheduling_type: :stage)
+
+        expect(pipeline.uses_needs?).to eq(false)
+      end
+    end
+  end
+
   describe '#total_size' do
     let(:pipeline) { create(:ci_pipeline) }
     let!(:build_job1) { create(:ci_build, pipeline: pipeline, stage_idx: 0) }