Merge branch 'long.polyglot/gitlab-ce-issue_17479_todos_not_remove_when_leave_project'

CHANGELOG

@@ -4,6 +4,7 @@ v 8.9.0 (unreleased)
   - Allow enabling wiki page events from Webhook management UI
   - Make EmailsOnPushWorker use Sidekiq mailers queue
   - Fix wiki page events' webhook to point to the wiki repository
+  - Fix issue todo not remove when leave project !4150 (Long Nguyen)
   - Allow forking projects with restricted visibility level
   - Improve note validation to prevent errors when creating invalid note via API
   - Remove project notification settings associated with deleted projects

app/models/members/project_member.rb

@@ -5,7 +5,6 @@ class ProjectMember < Member
 
   belongs_to :project, class_name: 'Project', foreign_key: 'source_id'
 
-
   # Make sure project member points only to project as it source
   default_value_for :source_type, SOURCE_TYPE
   validates_format_of :source_type, with: /\AProject\z/
@@ -15,6 +14,8 @@ class ProjectMember < Member
   scope :in_projects, ->(projects) { where(source_id: projects.pluck(:id)) }
   scope :with_user, ->(user) { where(user_id: user.id) }
 
+  before_destroy :delete_member_todos
+
   class << self
 
     # Add users to project teams with passed access option
@@ -102,6 +103,10 @@ class ProjectMember < Member
 
   private
 
+  def delete_member_todos
+    user.todos.where(project_id: source_id).destroy_all if user
+  end
+
   def send_invite
     notification_service.invite_project_member(self, @raw_invite_token)
 

spec/models/members/project_member_spec.rb

@@ -20,6 +20,48 @@
 require 'spec_helper'
 
 describe ProjectMember, models: true do
+  describe 'associations' do
+    it { is_expected.to belong_to(:project).class_name('Project').with_foreign_key(:source_id) }
+  end
+
+  describe 'validations' do
+    it { is_expected.to allow_value('Project').for(:source_type) }
+    it { is_expected.not_to allow_value('project').for(:source_type) }
+  end
+
+  describe 'modules' do
+    it { is_expected.to include_module(Gitlab::ShellAdapter) }
+  end
+
+  describe "#destroy" do
+    let(:owner)   { create(:project_member, access_level: ProjectMember::OWNER) }
+    let(:project) { owner.project }
+    let(:master)  { create(:project_member, project: project) }
+
+    let(:owner_todos)  { (0...2).map { create(:todo, user: owner.user, project: project) } }
+    let(:master_todos) { (0...3).map { create(:todo, user: master.user, project: project) } }
+
+    before do
+      owner_todos
+      master_todos
+    end
+
+    it "destroy itself and delete associated todos" do
+      expect(owner.user.todos.size).to eq(2)
+      expect(master.user.todos.size).to eq(3)
+      expect(Todo.count).to eq(5)
+
+      master_todo_ids = master_todos.map(&:id)
+      master.destroy
+
+      expect(owner.user.todos.size).to eq(2)
+      expect(Todo.count).to eq(2)
+      master_todo_ids.each do |id|
+        expect(Todo.exists?(id)).to eq(false)
+      end
+    end
+  end
+
   describe :import_team do
     before do
       @abilities = Six.new