Rename ambiguous association names in Ci::Pipeline

fix it ok

Fix

head pipeline

app/mailers/emails/pipelines.rb

@@ -15,7 +15,7 @@ module Emails
     def pipeline_mail(pipeline, recipients, status)
       @project = pipeline.project
       @pipeline = pipeline
-      @merge_request = pipeline.merge_requests.first
+      @merge_request = pipeline.merge_requests_as_head_pipeline.first
       add_headers
 
       # We use bcc here because we don't want to generate this emails for a

app/models/ci/pipeline.rb

@@ -39,7 +39,7 @@ module Ci
 
     # Merge requests for which the current pipeline is running against
     # the merge request's latest commit.
-    has_many :merge_requests, foreign_key: "head_pipeline_id"
+    has_many :merge_requests_as_head_pipeline, foreign_key: "head_pipeline_id", class_name: 'MergeRequest'
 
     has_many :pending_builds, -> { pending }, foreign_key: :commit_id, class_name: 'Ci::Build'
     has_many :retryable_builds, -> { latest.failed_or_canceled.includes(:project) }, foreign_key: :commit_id, class_name: 'Ci::Build'

app/workers/pipeline_metrics_worker.rb

@@ -30,6 +30,6 @@ class PipelineMetricsWorker
   # rubocop: enable CodeReuse/ActiveRecord
 
   def merge_requests(pipeline)
-    pipeline.merge_requests.map(&:id)
+    pipeline.merge_requests_as_head_pipeline.map(&:id)
   end
 end

spec/lib/gitlab/import_export/all_models.yml

@@ -127,7 +127,7 @@ ci_pipelines:
 - scheduled_actions
 - artifacts
 - pipeline_schedule
-- merge_requests
+- merge_requests_as_head_pipeline
 - merge_request
 - deployments
 - environments

spec/models/ci/pipeline_spec.rb

@@ -2252,7 +2252,7 @@ describe Ci::Pipeline, :mailer do
     end
   end
 
-  describe "#merge_requests" do
+  describe "#merge_requests_as_head_pipeline" do
     let(:project) { create(:project) }
     let(:pipeline) { create(:ci_empty_pipeline, status: 'created', project: project, ref: 'master', sha: 'a288a022a53a5a944fae87bcec6efc87b7061808') }
 
@@ -2260,20 +2260,20 @@ describe Ci::Pipeline, :mailer do
       allow_any_instance_of(MergeRequest).to receive(:diff_head_sha) { 'a288a022a53a5a944fae87bcec6efc87b7061808' }
       merge_request = create(:merge_request, source_project: project, head_pipeline: pipeline, source_branch: pipeline.ref)
 
-      expect(pipeline.merge_requests).to eq([merge_request])
+      expect(pipeline.merge_requests_as_head_pipeline).to eq([merge_request])
     end
 
     it "doesn't return merge requests whose source branch doesn't match the pipeline's ref" do
       create(:merge_request, source_project: project, source_branch: 'feature', target_branch: 'master')
 
-      expect(pipeline.merge_requests).to be_empty
+      expect(pipeline.merge_requests_as_head_pipeline).to be_empty
     end
 
     it "doesn't return merge requests whose `diff_head_sha` doesn't match the pipeline's SHA" do
       create(:merge_request, source_project: project, source_branch: pipeline.ref)
       allow_any_instance_of(MergeRequest).to receive(:diff_head_sha) { '97de212e80737a608d939f648d959671fb0a0142b' }
 
-      expect(pipeline.merge_requests).to be_empty
+      expect(pipeline.merge_requests_as_head_pipeline).to be_empty
     end
   end