Merge branch 'zj-update-project-settings' into 'master'

Allow updating of project auto devops settings

Closes #37893

See merge request gitlab-org/gitlab-ce!14291

app/models/project.rb

@@ -192,7 +192,7 @@ class Project < ActiveRecord::Base
   accepts_nested_attributes_for :variables, allow_destroy: true
   accepts_nested_attributes_for :project_feature, update_only: true
   accepts_nested_attributes_for :import_data
-  accepts_nested_attributes_for :auto_devops
+  accepts_nested_attributes_for :auto_devops, update_only: true
   delegate :name, to: :owner, allow_nil: true, prefix: true
   delegate :members, to: :team, prefix: true

app/views/projects/pipelines_settings/_show.html.haml

@@ -25,8 +25,8 @@
                 %span.descr
                   A specific .gitlab-ci.yml file needs to be specified before you can begin using Continious Integration and Delivery.
             .radio
-              = form.label :enabled do
-                = form.radio_button :enabled, nil
+              = form.label :enabled_nil do
+                = form.radio_button :enabled, ''
                 %strong
                   Instance default (status: #{current_application_settings.auto_devops_enabled?})
                 %br

spec/controllers/projects/pipelines_settings_controller_spec.rb

+require 'spec_helper'
+
+describe Projects::PipelinesSettingsController do
+  set(:user) { create(:user) }
+  set(:project_auto_devops) { create(:project_auto_devops) }
+  let(:project) { project_auto_devops.project }
+
+  before do
+    project.add_master(user)
+
+    sign_in(user)
+  end
+
+  describe 'PATCH update' do
+    before do
+      patch :update,
+        namespace_id: project.namespace.to_param,
+        project_id: project,
+        project: {
+          auto_devops_attributes: params
+        }
+    end
+
+    context 'when updating the auto_devops settings' do
+      let(:params) { { enabled: '', domain: 'mepmep.md' } }
+
+      it 'redirects to the settings page' do
+        expect(response).to have_http_status(302)
+        expect(flash[:notice]).to eq("Pipelines settings for '#{project.name}' were successfully updated.")
+      end
+
+      context 'following the instance default' do
+        let(:params) { { enabled: '' } }
+
+        it 'allows enabled to be set to nil' do
+          project_auto_devops.reload
+
+          expect(project_auto_devops.enabled).to be_nil
+        end
+      end
+    end
+  end
+end