Fix issuable templates dropdown for forked projects

CHANGELOG

@@ -7,6 +7,7 @@ v 8.12.0 (unreleased)
   - Cleanup misalignments in Issue list view !6206
   - Prune events older than 12 months. (ritave)
   - Prepend blank line to `Closes` message on merge request linked to issue (lukehowell)
+  - Fix issues/merge-request templates dropdown for forked projects
   - Filter tags by name !6121
   - Update gitlab shell secret file also when it is empty. !3774 (glensc)
   - Give project selection dropdowns responsive width, make non-wrapping.

app/views/shared/issuable/_form.html.haml

@@ -19,7 +19,7 @@
 
         = dropdown_tag(title, options: { toggle_class: 'js-issuable-selector',
           title: title, filter: true, placeholder: 'Filter', footer_content: true,
-          data: { data: issuable_template_names, field_name: 'issuable_template', selected: selected_template(issuable), project_path: @project.path, namespace_path: @project.namespace.path } } ) do
+          data: { data: issuable_template_names, field_name: 'issuable_template', selected: selected_template(issuable), project_path: ref_project.path, namespace_path: ref_project.namespace.path } } ) do
           %ul.dropdown-footer-list
             %li
               %a.reset-template

spec/features/projects/issuable_templates_spec.rb

@@ -64,7 +64,7 @@ feature 'issuable templates', feature: true, js: true do
     let(:template_content) { 'this is a test "feature-proposal" template' }
     let(:fork_user) { create(:user) }
     let(:fork_project) { create(:project, :public) }
-    let(:merge_request) { create(:merge_request, :with_diffs, source_project: fork_project) }
+    let(:merge_request) { create(:merge_request, :with_diffs, source_project: fork_project, target_project: project) }
 
     background do
       logout
@@ -72,18 +72,22 @@ feature 'issuable templates', feature: true, js: true do
       fork_project.team << [fork_user, :master]
       create(:forked_project_link, forked_to_project: fork_project, forked_from_project: project)
       login_as fork_user
-      fork_project.repository.commit_file(fork_user, '.gitlab/merge_request_templates/feature-proposal.md', template_content, 'added merge request template', 'master', false)
-      visit edit_namespace_project_merge_request_path fork_project.namespace, fork_project, merge_request
+      project.repository.commit_file(fork_user, '.gitlab/merge_request_templates/feature-proposal.md', template_content, 'added merge request template', 'master', false)
+      visit edit_namespace_project_merge_request_path project.namespace, project, merge_request
       fill_in :'merge_request[title]', with: 'test merge request title'
     end
 
-    scenario 'user selects "feature-proposal" template' do
+    context 'feature proposal template' do
+      context 'template exists in target project' do
+        scenario 'user selects template' do
           select_template 'feature-proposal'
           wait_for_ajax
           preview_template
           save_changes
         end
       end
+    end
+  end
 
   def preview_template
     click_link 'Preview'