Allow to apply issue inherited templates using URL

Fix not applying inherited issue templates using URL

Changelog: fixed
EE: true

app/helpers/issuables_description_templates_helper.rb

@@ -32,13 +32,14 @@ module IssuablesDescriptionTemplatesHelper
     @template_types[project.id][issuable_type] ||= TemplateFinder.all_template_names(project, issuable_type.pluralize)
   end
 
-  def issuable_templates_names(issuable)
+  # Overriden on EE::IssuablesDescriptionTemplatesHelper to include inherited templates names
+  def issuable_templates_names(issuable, include_inherited_templates = false)
     all_templates = issuable_templates(ref_project, issuable.to_ability_name)
     all_templates.values.flatten.map { |tpl| tpl[:name] if tpl[:project_id] == ref_project.id }.compact.uniq
   end
 
   def selected_template(issuable)
-    params[:issuable_template] if issuable_templates_names(issuable).any? { |tmpl_name| tmpl_name == params[:issuable_template] }
+    params[:issuable_template] if issuable_templates_names(issuable, true).any? { |tmpl_name| tmpl_name == params[:issuable_template] }
   end
 
   def template_names_path(parent, issuable)
@@ -47,3 +48,5 @@ module IssuablesDescriptionTemplatesHelper
     project_template_names_path(parent, template_type: issuable.to_ability_name)
   end
 end
+
+IssuablesDescriptionTemplatesHelper.prepend_mod

ee/app/helpers/ee/issuables_description_templates_helper.rb

+# frozen_string_literal: true
+
+module EE
+  module IssuablesDescriptionTemplatesHelper
+    extend ::Gitlab::Utils::Override
+
+    override :issuable_templates_names
+    def issuable_templates_names(issuable, include_inherited_templates = false)
+      return super unless include_inherited_templates
+
+      all_templates = issuable_templates(ref_project, issuable.to_ability_name)
+      all_templates.values.flatten.map { |tpl| tpl[:name] }.compact.uniq
+    end
+  end
+end

ee/spec/features/projects/issues/user_creates_issue_spec.rb

@@ -74,4 +74,30 @@ RSpec.describe "User creates issue", :js do
       expect(page).to have_content(issue_title)
     end
   end
+
+  context 'when new issue url has parameter' do
+    context 'for inherited issue template' do
+      let_it_be(:template_project) { create(:project, :public, :repository) }
+
+      before do
+        template_project.repository.create_file(
+          user,
+          '.gitlab/issue_templates/bug.md',
+          'this is a test "bug" template',
+          message: 'added issue template',
+          branch_name: 'master')
+
+        group.add_owner(user)
+        stub_licensed_features(custom_file_templates_for_namespace: true)
+        create(:project_group_link, project: template_project, group: group)
+        group.update!(file_template_project_id: template_project.id)
+
+        visit new_project_issue_path(project, issuable_template: 'bug')
+      end
+
+      it 'fills in with inherited template' do
+        expect(find('.js-issuable-selector .dropdown-toggle-text')).to have_content('bug')
+      end
+    end
+  end
 end

ee/spec/helpers/ee/issuables_description_templates_helper_spec.rb

@@ -5,8 +5,6 @@ require 'spec_helper'
 RSpec.describe IssuablesDescriptionTemplatesHelper do
   include_context 'project issuable templates context'
 
-  describe '#issuable_templates' do
-    context 'when project parent group has a file template project' do
   let_it_be(:user) { create(:user) }
   let_it_be_with_reload(:parent_group) { create(:group) }
   let_it_be_with_reload(:group) { create(:group, parent: parent_group) }
@@ -15,6 +13,22 @@ RSpec.describe IssuablesDescriptionTemplatesHelper do
   let_it_be(:group_member) { create(:group_member, :developer, group: parent_group, user: user) }
   let_it_be(:inherited_from) { file_template_project }
 
+  shared_examples 'issuable templates' do
+    context 'when include_inherited_templates is true' do
+      it 'returns project templates and inherited templates' do
+        expect(helper.issuable_templates_names(Issue.new, true)).to eq(%w[project_template inherited_template])
+      end
+    end
+
+    context 'when include_inherited_templates is false' do
+      it 'returns only project templates' do
+        expect(helper.issuable_templates_names(Issue.new)).to eq(%w[project_template])
+      end
+    end
+  end
+
+  describe '#issuable_templates' do
+    context 'when project parent group has a file template project' do
       before do
         stub_licensed_features(custom_file_templates_for_namespace: true)
 
@@ -24,4 +38,20 @@ RSpec.describe IssuablesDescriptionTemplatesHelper do
       it_behaves_like 'project issuable templates'
     end
   end
+
+  describe '#issuable_template_names' do
+    let(:templates) do
+      {
+        '' => [{ name: 'project_template', id: 'project_issue_template', project_id: project.id }],
+        'Instance' => [{ name: 'inherited_template', id: 'instance_issue_template', project_id: file_template_project.id }]
+      }
+    end
+
+    before do
+      allow(helper).to receive(:ref_project).and_return(project)
+      allow(helper).to receive(:issuable_templates).and_return(templates)
+    end
+
+    it_behaves_like 'issuable templates'
+  end
 end

spec/helpers/issuables_description_templates_helper_spec.rb

@@ -41,19 +41,6 @@ RSpec.describe IssuablesDescriptionTemplatesHelper, :clean_gitlab_redis_cache do
       context 'when project parent group does not have a file template project' do
         it_behaves_like 'project issuable templates'
       end
-
-      context 'when project parent group has a file template project' do
-        let_it_be(:file_template_project) { create(:project, :custom_repo, group: parent_group, files: issuable_template_files) }
-        let_it_be(:group, reload: true) { create(:group, parent: parent_group) }
-        let_it_be(:project, reload: true) { create(:project, :custom_repo, group: group, files: issuable_template_files) }
-
-        before do
-          project.update!(group: group)
-          parent_group.update_columns(file_template_project_id: file_template_project.id)
-        end
-
-        it_behaves_like 'project issuable templates'
-      end
     end
   end
 
@@ -65,16 +52,12 @@ RSpec.describe IssuablesDescriptionTemplatesHelper, :clean_gitlab_redis_cache do
       allow(helper).to receive(:issuable_templates).and_return(templates)
     end
 
-    context 'with matching project templates' do
+    context 'with project templates' do
       let(:templates) do
         {
           "" => [
-            { name: "another_issue_template", id: "another_issue_template", project_id: project.id },
-            { name: "custom_issue_template", id: "custom_issue_template", project_id: project.id }
-          ],
-          "Instance" => [
-            { name: "first_issue_issue_template", id: "first_issue_issue_template", project_id: non_existing_record_id },
-            { name: "second_instance_issue_template", id: "second_instance_issue_template", project_id: non_existing_record_id }
+            { name: "another_issue_template", id: "another_issue_template" },
+            { name: "custom_issue_template", id: "custom_issue_template" }
           ]
         }
       end
@@ -90,10 +73,6 @@ RSpec.describe IssuablesDescriptionTemplatesHelper, :clean_gitlab_redis_cache do
           "Project Templates" => [
             { name: "another_issue_template", id: "another_issue_template", project_id: non_existing_record_id },
             { name: "custom_issue_template", id: "custom_issue_template", project_id: non_existing_record_id }
-          ],
-          "Instance" => [
-            { name: "first_issue_issue_template", id: "first_issue_issue_template", project_id: non_existing_record_id },
-            { name: "second_instance_issue_template", id: "second_instance_issue_template", project_id: non_existing_record_id }
           ]
         }
       end