Merge branch '35343-inherit-milestones-and-labels' into 'master'

copy milestones and labels from issue when using create merge request button

Closes #35343

See merge request !13461

app/services/merge_requests/create_from_issue_service.rb

@@ -3,6 +3,8 @@ module MergeRequests
     def execute
       return error('Invalid issue iid') unless issue_iid.present? && issue.present?
 
+      params[:label_ids] = issue.label_ids if issue.label_ids.any?
+      
       result = CreateBranchService.new(project, current_user).execute(branch_name, ref)
       return result if result[:status] == :error
 
@@ -43,7 +45,8 @@ module MergeRequests
       {
         source_project_id: project.id,
         source_branch: branch_name,
-        target_project_id: project.id
+        target_project_id: project.id,
+        milestone_id: issue.milestone_id
       }
     end
 

changelogs/unreleased/35343-inherit-milestones-and-labels.yml

+---
+title: inherits milestone and labels when a merge request is created from issue
+merge_request: 13461 
+author: haseebeqx
+type: added

spec/services/merge_requests/create_from_issue_service_spec.rb

@@ -3,7 +3,9 @@ require 'spec_helper'
 describe MergeRequests::CreateFromIssueService do
   let(:project) { create(:project, :repository) }
   let(:user) { create(:user) }
-  let(:issue)   { create(:issue, project: project) }
+  let(:label_ids) { create_pair(:label, project: project).map(&:id) }
+  let(:milestone_id) { create(:milestone, project: project).id }
+  let(:issue) { create(:issue, project: project, milestone_id: milestone_id) }
 
   subject(:service) { described_class.new(project, user, issue_iid: issue.iid) }
 
@@ -25,6 +27,20 @@ describe MergeRequests::CreateFromIssueService do
       described_class.new(project, user, issue_iid: -1).execute
     end
 
+    it "inherits labels" do
+      issue.assign_attributes(label_ids: label_ids)
+
+      result = service.execute
+
+      expect(result[:merge_request].label_ids).to eq(label_ids)
+    end
+
+    it "inherits milestones" do
+      result = service.execute
+
+      expect(result[:merge_request].milestone_id).to eq(milestone_id)
+    end
+
     it 'delegates the branch creation to CreateBranchService' do
       expect_any_instance_of(CreateBranchService).to receive(:execute).once.and_call_original