6 files changed, 17 insertions, 50 deletions
diff --git a/app/models/ci/pipeline.rb b/app/models/ci/pipeline.rb
index abac16a138d..01d96754518 100644
--- a/app/models/ci/pipeline.rb
+++ b/app/models/ci/pipeline.rb
@@ -206,10 +206,6 @@ module Ci
       triggered_by_merge_request(merge_request).for_source_sha(source_sha)
     end
 
-    scope :mergeable_merge_request_pipelines, -> (merge_request) do
-      triggered_by_merge_request(merge_request).where(target_sha: merge_request.target_branch_sha)
-    end
-
     scope :triggered_for_branch, -> (ref) do
       where(source: branch_pipeline_sources).where(ref: ref, tag: false)
     end
@@ -746,10 +742,6 @@ module Ci
       triggered_by_merge_request? && target_sha.present?
     end
 
-    def mergeable_merge_request_pipeline?
-      triggered_by_merge_request? && target_sha == merge_request.target_branch_sha
-    end
-
     def merge_request_ref?
       MergeRequest.merge_request_ref?(ref)
     end
diff --git a/app/serializers/merge_request_widget_entity.rb b/app/serializers/merge_request_widget_entity.rb
index 2142ceb6122..d673f8ae896 100644
--- a/app/serializers/merge_request_widget_entity.rb
+++ b/app/serializers/merge_request_widget_entity.rb
@@ -20,6 +20,7 @@ class MergeRequestWidgetEntity < IssuableEntity
   end
   expose :squash
   expose :target_branch
+  expose :target_branch_sha
   expose :target_project_id
   expose :target_project_full_path do |merge_request|
     merge_request.project&.full_path
diff --git a/app/serializers/pipeline_entity.rb b/app/serializers/pipeline_entity.rb
index fba72410217..8fe5df81e6c 100644
--- a/app/serializers/pipeline_entity.rb
+++ b/app/serializers/pipeline_entity.rb
@@ -59,6 +59,8 @@ class PipelineEntity < Grape::Entity
   end
 
   expose :commit, using: CommitEntity
+  expose :source_sha, if: -> (pipeline, _) { pipeline.merge_request_pipeline? }
+  expose :target_sha, if: -> (pipeline, _) { pipeline.merge_request_pipeline? }
   expose :yaml_errors, if: -> (pipeline, _) { pipeline.has_yaml_errors? }
 
   expose :failure_reason, if: -> (pipeline, _) { pipeline.failure_reason? } do |pipeline|
diff --git a/spec/models/ci/pipeline_spec.rb b/spec/models/ci/pipeline_spec.rb
index e76cf376ed1..83b0f172f03 100644
--- a/spec/models/ci/pipeline_spec.rb
+++ b/spec/models/ci/pipeline_spec.rb
@@ -322,48 +322,6 @@ describe Ci::Pipeline, :mailer do
     end
   end
 
-  describe '.mergeable_merge_request_pipelines' do
-    subject { described_class.mergeable_merge_request_pipelines(merge_request) }
-
-    let!(:pipeline) do
-      create(:ci_pipeline, source: :merge_request_event, merge_request: merge_request, target_sha: target_sha)
-    end
-
-    let(:merge_request) { create(:merge_request) }
-    let(:target_sha) { merge_request.target_branch_sha }
-
-    it 'returns mergeable merge pipelines' do
-      is_expected.to eq([pipeline])
-    end
-
-    context 'when target sha does not point the head of the target branch' do
-      let(:target_sha) { merge_request.diff_head_sha }
-
-      it 'returns empty array' do
-        is_expected.to be_empty
-      end
-    end
-  end
-
-  describe '#mergeable_merge_request_pipeline?' do
-    subject { pipeline.mergeable_merge_request_pipeline? }
-
-    let!(:pipeline) do
-      create(:ci_pipeline, source: :merge_request_event, merge_request: merge_request, target_sha: target_sha)
-    end
-
-    let(:merge_request) { create(:merge_request) }
-    let(:target_sha) { merge_request.target_branch_sha }
-
-    it { is_expected.to be_truthy }
-
-    context 'when target sha does not point the head of the target branch' do
-      let(:target_sha) { merge_request.diff_head_sha }
-
-      it { is_expected.to be_falsy }
-    end
-  end
-
   describe '#merge_request_ref?' do
     subject { pipeline.merge_request_ref? }
 
diff --git a/spec/serializers/merge_request_widget_entity_spec.rb b/spec/serializers/merge_request_widget_entity_spec.rb
index 727fd8951f2..0e99ef38d2f 100644
--- a/spec/serializers/merge_request_widget_entity_spec.rb
+++ b/spec/serializers/merge_request_widget_entity_spec.rb
@@ -13,6 +13,10 @@ describe MergeRequestWidgetEntity do
     described_class.new(resource, request: request).as_json
   end
 
+  it 'has the latest sha of the target branch' do
+    is_expected.to include(:target_branch_sha)
+  end
+
   describe 'source_project_full_path' do
     it 'includes the full path of the source project' do
       expect(subject[:source_project_full_path]).to be_present
diff --git a/spec/serializers/pipeline_entity_spec.rb b/spec/serializers/pipeline_entity_spec.rb
index 1d992e8a483..dba7fd91747 100644
--- a/spec/serializers/pipeline_entity_spec.rb
+++ b/spec/serializers/pipeline_entity_spec.rb
@@ -143,6 +143,11 @@ describe PipelineEntity do
         expect(subject[:flags][:detached_merge_request_pipeline]).to be_truthy
       end
 
+      it 'does not expose source sha and target sha' do
+        expect(subject[:source_sha]).to be_nil
+        expect(subject[:target_sha]).to be_nil
+      end
+
       context 'when user is a developer' do
         before do
           project.add_developer(user)
@@ -189,6 +194,11 @@ describe PipelineEntity do
       it 'makes atached flag true' do
         expect(subject[:flags][:merge_request_pipeline]).to be_truthy
       end
+
+      it 'exposes source sha and target sha' do
+        expect(subject[:source_sha]).to be_present
+        expect(subject[:target_sha]).to be_present
+      end
     end
   end
 end