Added validation to AfterCreateService

Removed previous solution for this MR.
Set up call to Sentry when validation fails in service.

app/models/deployment.rb

@@ -135,7 +135,7 @@ class Deployment < ApplicationRecord
   end
 
   def create_ref
-    project.repository.create_ref(ref, ref_path)
+    project.repository.create_ref(sha, ref_path)
   end
 
   def invalidate_cache
@@ -280,12 +280,12 @@ class Deployment < ApplicationRecord
     errors.add(:ref, _('The branch or tag does not exist'))
   end
 
-  private
-
   def ref_path
     File.join(environment.ref_path, 'deployments', iid.to_s)
   end
 
+  private
+
   def legacy_finished_at
     self.created_at if success? && !read_attribute(:finished_at)
   end

app/models/environment.rb

@@ -193,15 +193,6 @@ class Environment < ApplicationRecord
     folder_name == "production"
   end
 
-  def first_deployment_for(commit_sha)
-    ref = project.repository.ref_name_for_sha(ref_path, commit_sha)
-
-    return unless ref
-
-    deployment_iid = ref.split('/').last
-    deployments.find_by(iid: deployment_iid)
-  end
-
   def ref_path
     "refs/#{Repository::REF_ENVIRONMENTS}/#{slug}"
   end

changelogs/unreleased/193170-fix-deployment-ref-validation.yml

+---
+title: Use of sha instead of ref when creating a new ref on deployment creation.
+merge_request: 23170
+author:
+type: fixed

spec/models/deployment_spec.rb

@@ -520,6 +520,21 @@ describe Deployment do
     end
   end
 
+  describe '#create_ref' do
+    let(:deployment) { build(:deployment) }
+
+    subject { deployment.create_ref }
+
+    it 'creates a ref using the sha' do
+      expect(deployment.project.repository).to receive(:create_ref).with(
+        deployment.sha,
+        "refs/environments/#{deployment.environment.name}/deployments/#{deployment.iid}"
+      )
+
+      subject
+    end
+  end
+
   describe '#playable_build' do
     subject { deployment.playable_build }
 

spec/models/environment_spec.rb

@@ -325,26 +325,6 @@ describe Environment, :use_clean_rails_memory_store_caching do
     end
   end
 
-  describe '#first_deployment_for' do
-    let(:project)       { create(:project, :repository) }
-    let!(:deployment)   { create(:deployment, :succeed, environment: environment, ref: commit.parent.id) }
-    let!(:deployment1)  { create(:deployment, :succeed, environment: environment, ref: commit.id) }
-    let(:head_commit)   { project.commit }
-    let(:commit)        { project.commit.parent }
-
-    it 'returns deployment id for the environment', :sidekiq_might_not_need_inline do
-      expect(environment.first_deployment_for(commit.id)).to eq deployment1
-    end
-
-    it 'return nil when no deployment is found' do
-      expect(environment.first_deployment_for(head_commit.id)).to eq nil
-    end
-
-    it 'returns a UTF-8 ref', :sidekiq_might_not_need_inline do
-      expect(environment.first_deployment_for(commit.id).ref).to be_utf8
-    end
-  end
-
   describe '#environment_type' do
     subject { environment.environment_type }
 

spec/services/deployments/after_create_service_spec.rb

@@ -49,7 +49,7 @@ describe Deployments::AfterCreateService do
     it 'creates ref' do
       expect_any_instance_of(Repository)
         .to receive(:create_ref)
-        .with(deployment.ref, deployment.send(:ref_path))
+        .with(deployment.sha, deployment.send(:ref_path))
 
       service.execute
     end