Use ci_commits.ref (Pipeline#ref) to find builds

app/models/project.rb

@@ -434,15 +434,8 @@ class Project < ActiveRecord::Base
   end
 
   def builds_for(ref = 'HEAD')
-    commit_object = commit(ref)
-
-    if commit_object.nil?
-      Ci::Build.none
-    else
     Ci::Build.joins(:pipeline).
-        merge(Ci::Pipeline.where(sha: commit_object.sha,
-                                 project: self))
-    end
+      merge(Ci::Pipeline.where(ref: ref, project: self))
   end
 
   def merge_base_commit(first_commit_id, second_commit_id)

spec/models/build_spec.rb

@@ -5,7 +5,8 @@ describe Ci::Build, models: true do
 
   let(:pipeline) do
     create(:ci_pipeline, project: project,
-                         sha: project.commit.id)
+                         sha: project.commit.id,
+                         ref: 'fix')
   end
 
   let(:build) { create(:ci_build, pipeline: pipeline) }
@@ -698,7 +699,7 @@ describe Ci::Build, models: true do
     end
 
     it 'returns builds from ref' do
-      builds = project.latest_success_builds_for('HEAD')
+      builds = project.latest_success_builds_for('fix')
 
       expect(builds).to contain_exactly(build)
     end

spec/requests/api/builds_spec.rb

@@ -190,7 +190,7 @@ describe API::API, api: true do
   describe 'GET /projects/:id/artifacts/:ref_name/download?job=name' do
     include_context 'artifacts from ref and build name'
 
-    def path_from_ref(ref = pipeline.sha, job = build.name)
+    def path_from_ref(ref = pipeline.ref, job = build.name)
       api("/projects/#{project.id}/builds/artifacts/#{ref}/download?job=#{job}", user)
     end
 

spec/requests/projects/artifacts_controller_spec.rb

@@ -10,7 +10,7 @@ describe Projects::ArtifactsController do
     end
 
     def path_from_ref(
-      ref = pipeline.sha, job = build.name, path = 'browse')
+      ref = pipeline.ref, job = build.name, path = 'browse')
       search_namespace_project_artifacts_path(
         project.namespace,
         project,

spec/requests/shared/artifacts_context.rb

@@ -2,7 +2,10 @@ shared_context 'artifacts from ref and build name' do
   let(:user) { create(:user) }
   let(:project) { create(:project) }
   let(:pipeline) do
-    create(:ci_pipeline, project: project, sha: project.commit('fix').sha)
+    create(:ci_pipeline,
+            project: project,
+            sha: project.commit('fix').sha,
+            ref: 'fix')
   end
   let(:build) { create(:ci_build, :success, :artifacts, pipeline: pipeline) }
 
@@ -30,17 +33,10 @@ shared_examples 'artifacts from ref with 404' do
 end
 
 shared_examples 'artifacts from ref successfully' do
-  context 'with sha' do
-    before do
-      get path_from_ref
-    end
-
-    it('gives the file') { verify }
-  end
-
   context 'with regular branch' do
     before do
-      pipeline.update(sha: project.commit('master').sha)
+      pipeline.update(ref: 'master',
+                      sha: project.commit('master').sha)
     end
 
     before do
@@ -52,7 +48,8 @@ shared_examples 'artifacts from ref successfully' do
 
   context 'with branch name containing slash' do
     before do
-      pipeline.update(sha: project.commit('improve/awesome').sha)
+      pipeline.update(ref: 'improve/awesome',
+                      sha: project.commit('improve/awesome').sha)
     end
 
     before do