Added relationships between Release and Milestone

Modified schema via migrations.
Added one-to-one relationship between the two models.
Added changelog file

3 files changed, 27 insertions, 1 deletions

diff --git a/app/services/releases/concerns.rb b/app/services/releases/concerns.rb
index 618d96717b8..b5412e97284 100644
--- a/app/services/releases/concerns.rb
+++ b/app/services/releases/concerns.rb
@@ -47,6 +47,27 @@ module Releases
           project.repository
         end
       end
+
+      def milestone
+        return unless params[:milestone]
+
+        strong_memoize(:milestone) do
+          MilestonesFinder.new(
+            project: project,
+            current_user: current_user,
+            project_ids: Array(project.id),
+            title: params[:milestone]
+          ).execute.first
+        end
+      end
+
+      def inexistent_milestone?
+        params[:milestone] && !params[:milestone].empty? && !milestone
+      end
+
+      def param_for_milestone_title_provided?
+        params[:milestone].present? || params[:milestone]&.empty?
+      end
     end
   end
 end
diff --git a/app/services/releases/create_service.rb b/app/services/releases/create_service.rb
index 5b13ac631ba..c91d43084d3 100644
--- a/app/services/releases/create_service.rb
+++ b/app/services/releases/create_service.rb
@@ -7,6 +7,7 @@ module Releases
     def execute
       return error('Access Denied', 403) unless allowed?
       return error('Release already exists', 409) if release
+      return error('Milestone does not exist', 400) if inexistent_milestone?
 
       tag = ensure_tag
 
@@ -59,7 +60,8 @@ module Releases
         tag: tag.name,
         sha: tag.dereferenced_target.sha,
         released_at: released_at,
-        links_attributes: params.dig(:assets, 'links') || []
+        links_attributes: params.dig(:assets, 'links') || [],
+        milestone: milestone
       )
     end
   end
diff --git a/app/services/releases/update_service.rb b/app/services/releases/update_service.rb
index fabfa398c59..70acc68f747 100644
--- a/app/services/releases/update_service.rb
+++ b/app/services/releases/update_service.rb
@@ -9,6 +9,9 @@ module Releases
       return error('Release does not exist', 404) unless release
       return error('Access Denied', 403) unless allowed?
       return error('params is empty', 400) if empty_params?
+      return error('Milestone does not exist', 400) if inexistent_milestone?
+
+      params[:milestone] = milestone if param_for_milestone_title_provided?
 
       if release.update(params)
         success(tag: existing_tag, release: release)