Remove rails observers from application

36 files changed, 52 insertions, 229 deletions

diff --git a/Gemfile b/Gemfile
index c64213479f7..39ffd95b2e2 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,7 +11,6 @@ end
 gem "rails", "~> 4.1.0"
 
 gem "protected_attributes"
-gem 'rails-observers'
 
 # Make links from text
 gem 'rails_autolink', '~> 1.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index 6c27b6e3739..382633c2246 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -365,8 +365,6 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.1.1)
       sprockets-rails (~> 2.0)
-    rails-observers (0.1.2)
-      activemodel (~> 4.0)
     rails_autolink (1.1.6)
       rails (> 3.1)
     rails_best_practices (1.14.4)
@@ -644,7 +642,6 @@ DEPENDENCIES
   rack-cors
   rack-mini-profiler
   rails (~> 4.1.0)
-  rails-observers
   rails_autolink (~> 1.1)
   rails_best_practices
   raphael-rails (~> 2.1.2)
diff --git a/app/models/users_project.rb b/app/models/users_project.rb
index e8810f56def..6495bed4e61 100644
--- a/app/models/users_project.rb
+++ b/app/models/users_project.rb
@@ -37,6 +37,10 @@ class UsersProject < ActiveRecord::Base
   scope :in_projects, ->(projects) { where(project_id: projects.map { |p| p.id }) }
   scope :with_user, ->(user) { where(user_id: user.id) }
 
+  after_create :post_create_hook
+  after_update :post_update_hook
+  after_destroy :post_destroy_hook
+
   class << self
 
     # Add users to project teams with passed access option
@@ -114,4 +118,37 @@ class UsersProject < ActiveRecord::Base
   def owner?
     project.owner == user
   end
+
+  def post_create_hook
+    Event.create(
+      project_id: self.project.id,
+      action: Event::JOINED,
+      author_id: self.user.id
+    )
+
+    notification_service.new_team_member(self)
+    system_hook_service.execute_hooks_for(self, :create)
+  end
+
+  def post_update_hook
+    notification_service.update_team_member(self) if self.project_access_changed?
+  end
+
+  def post_destroy_hook
+    Event.create(
+      project_id: self.project.id,
+      action: Event::LEFT,
+      author_id: self.user.id
+    )
+
+    system_hook_service.execute_hooks_for(self, :destroy)
+  end
+
+  def notification_service
+    NotificationService.new
+  end
+
+  def system_hook_service
+    SystemHooksService.new
+  end
 end
diff --git a/app/observers/base_observer.rb b/app/observers/base_observer.rb
deleted file mode 100644
index 5a821d269a2..00000000000
--- a/app/observers/base_observer.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-class BaseObserver < ActiveRecord::Observer
-  def notification
-    NotificationService.new
-  end
-
-  def event_service
-    EventCreateService.new
-  end
-
-  def log_info message
-    Gitlab::AppLogger.info message
-  end
-
-  def system_hook_service
-    SystemHooksService.new
-  end
-end
diff --git a/app/observers/users_project_observer.rb b/app/observers/users_project_observer.rb
deleted file mode 100644
index b0c37d1d222..00000000000
--- a/app/observers/users_project_observer.rb
+++ /dev/null
@@ -1,25 +0,0 @@
-class UsersProjectObserver < BaseObserver
-  def after_create(users_project)
-    Event.create(
-      project_id: users_project.project.id,
-      action: Event::JOINED,
-      author_id: users_project.user.id
-    )
-
-    notification.new_team_member(users_project)
-    system_hook_service.execute_hooks_for(users_project, :create)
-  end
-
-  def after_update(users_project)
-    notification.update_team_member(users_project) if users_project.project_access_changed?
-  end
-
-  def after_destroy(users_project)
-    Event.create(
-      project_id: users_project.project.id,
-      action: Event::LEFT,
-      author_id: users_project.user.id
-    )
-    system_hook_service.execute_hooks_for(users_project, :destroy)
-  end
-end
diff --git a/config/application.rb b/config/application.rb
index b68a4ffe347..0a77f58f6d1 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -18,9 +18,6 @@ module Gitlab
     # :all can be used as a placeholder for all plugins not explicitly named.
     # config.plugins = [ :exception_notification, :ssl_requirement, :all ]
 
-    # Activate observers that should always be running.
-    config.active_record.observers = :users_project_observer
-
     # Set Time.zone default to the specified zone and make Active Record auto-convert to this zone.
     # Run "rake -D time" for a list of tasks for finding time zone names. Default is UTC.
     # config.time_zone = 'Central Time (US & Canada)'
diff --git a/spec/features/admin/admin_users_spec.rb b/spec/features/admin/admin_users_spec.rb
index 1aba40966c4..82da19746f8 100644
--- a/spec/features/admin/admin_users_spec.rb
+++ b/spec/features/admin/admin_users_spec.rb
@@ -47,20 +47,16 @@ describe "Admin::Users", feature: true  do
     it "should call send mail" do
       Notify.should_receive(:new_user_email)
 
-      User.observers.enable :user_observer do
-        click_button "Create user"
-      end
+      click_button "Create user"
     end
 
     it "should send valid email to user with email & password" do
-      User.observers.enable :user_observer do
-        click_button "Create user"
-        user = User.last
-        email = ActionMailer::Base.deliveries.last
-        email.subject.should have_content("Account was created")
-        email.text_part.body.should have_content(user.email)
-        email.text_part.body.should have_content('password')
-      end
+      click_button "Create user"
+      user = User.last
+      email = ActionMailer::Base.deliveries.last
+      email.subject.should have_content("Account was created")
+      email.text_part.body.should have_content(user.email)
+      email.text_part.body.should have_content('password')
     end
   end
 
diff --git a/spec/features/profile_spec.rb b/spec/features/profile_spec.rb
index e8364bbb962..bdf7b59114b 100644
--- a/spec/features/profile_spec.rb
+++ b/spec/features/profile_spec.rb
@@ -1,8 +1,6 @@
 require 'spec_helper'
 
 describe "Profile account page", feature: true do
-  before(:each) { enable_observers }
-  after(:each) {disable_observers}
   let(:user) { create(:user) }
 
   before do
diff --git a/spec/features/projects_spec.rb b/spec/features/projects_spec.rb
index 1e24782c39a..524c4d5fa21 100644
--- a/spec/features/projects_spec.rb
+++ b/spec/features/projects_spec.rb
@@ -1,8 +1,6 @@
 require 'spec_helper'
 
 describe "Projects", feature: true  do
-  before(:each) { enable_observers }
-  after(:each) {disable_observers}
   before { login_as :user }
 
   describe "DELETE /projects/:id" do
diff --git a/spec/features/search_spec.rb b/spec/features/search_spec.rb
index f12eb124296..cce9f06cb69 100644
--- a/spec/features/search_spec.rb
+++ b/spec/features/search_spec.rb
@@ -2,7 +2,6 @@ require 'spec_helper'
 
 describe "Search", feature: true  do
   before do
-    ActiveRecord::Base.observers.enable(:user_observer)
     login_as :user
     @project = create(:project, namespace: @user.namespace)
     @project.team << [@user, :reporter]
diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index a2519fbd684..93eae5a9ebd 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -27,9 +27,6 @@
 require 'spec_helper'
 
 describe Project do
-  before { enable_observers }
-  after { disable_observers }
-
   describe "Associations" do
     it { should belong_to(:group) }
     it { should belong_to(:namespace) }
diff --git a/spec/models/system_hook_spec.rb b/spec/models/system_hook_spec.rb
index 47d6d861d70..51aaccf2267 100644
--- a/spec/models/system_hook_spec.rb
+++ b/spec/models/system_hook_spec.rb
@@ -19,8 +19,6 @@ require "spec_helper"
 
 describe SystemHook do
   describe "execute" do
-    before(:each) { ActiveRecord::Base.observers.enable(:all) }
-
     before(:each) do
       @system_hook = create(:system_hook)
       WebMock.stub_request(:post, @system_hook.url)
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 4e0ebb584d1..0a665b7defb 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -145,7 +145,6 @@ describe User do
 
   describe 'projects' do
     before do
-      ActiveRecord::Base.observers.enable(:user_observer)
       @user = create :user
       @project = create :project, namespace: @user.namespace
       @project_2 = create :project, group: create(:group) # Grant MASTER access to the user
@@ -168,7 +167,6 @@ describe User do
 
   describe 'groups' do
     before do
-      ActiveRecord::Base.observers.enable(:user_observer)
       @user = create :user
       @group = create :group
       @group.add_owner(@user)
@@ -181,7 +179,6 @@ describe User do
 
   describe 'group multiple owners' do
     before do
-      ActiveRecord::Base.observers.enable(:user_observer)
       @user = create :user
       @user2 = create :user
       @group = create :group
@@ -195,7 +192,6 @@ describe User do
 
   describe 'namespaced' do
     before do
-      ActiveRecord::Base.observers.enable(:user_observer)
       @user = create :user
       @project = create :project, namespace: @user.namespace
     end
@@ -339,7 +335,7 @@ describe User do
       user.all_ssh_keys.should include(key.key)
     end
   end
-    
+
   describe :avatar_type do
     let(:user) { create(:user) }
 
diff --git a/spec/observers/users_project_observer_spec.rb b/spec/observers/users_project_observer_spec.rb
deleted file mode 100644
index b024465e8c3..00000000000
--- a/spec/observers/users_project_observer_spec.rb
+++ /dev/null
@@ -1,63 +0,0 @@
-require 'spec_helper'
-
-describe UsersProjectObserver do
-  before(:each) { enable_observers }
-  after(:each) { disable_observers }
-
-  let(:user) { create(:user) }
-  let(:project) { create(:project) }
-  subject { UsersProjectObserver.instance }
-  before { subject.stub(notification: double('NotificationService').as_null_object) }
-
-  describe "#after_update" do
-    before do
-      @users_project = create :users_project
-    end
-
-    it "should called when UsersProject updated" do
-      subject.should_receive(:after_update)
-      @users_project.update_attribute(:project_access, UsersProject::MASTER)
-    end
-
-    it "should send email to user" do
-      subject.should_receive(:notification)
-      @users_project.update_attribute(:project_access, UsersProject::OWNER)
-    end
-
-    it "should not called after UsersProject destroyed" do
-      subject.should_not_receive(:after_update)
-      @users_project.destroy
-    end
-  end
-
-  describe "#after_destroy" do
-    before do
-      @users_project = create :users_project
-    end
-
-    it "should called when UsersProject destroyed" do
-      subject.should_receive(:after_destroy)
-      @users_project.destroy
-    end
-
-    it "should create new event" do
-      Event.should_receive(:create)
-      @users_project.destroy
-    end
-  end
-
-  describe "#after_create" do
-    it "should send email to user" do
-      subject.should_receive(:notification)
-      Event.stub(create: true)
-
-      create(:users_project)
-    end
-
-    it "should create new event" do
-      Event.should_receive(:create)
-
-      create(:users_project)
-    end
-  end
-end
diff --git a/spec/requests/api/branches_spec.rb b/spec/requests/api/branches_spec.rb
index 72589da5d40..b145e620122 100644
--- a/spec/requests/api/branches_spec.rb
+++ b/spec/requests/api/branches_spec.rb
@@ -3,8 +3,6 @@ require 'mime/types'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { enable_observers }
-  after(:each) {disable_observers}
 
   let(:user) { create(:user) }
   let(:user2) { create(:user) }
diff --git a/spec/requests/api/commits_spec.rb b/spec/requests/api/commits_spec.rb
index 165276d1435..b56269d275d 100644
--- a/spec/requests/api/commits_spec.rb
+++ b/spec/requests/api/commits_spec.rb
@@ -3,9 +3,6 @@ require 'mime/types'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { enable_observers }
-  after(:each) {disable_observers}
-
   let(:user) { create(:user) }
   let(:user2) { create(:user) }
   let!(:project) { create(:project, creator_id: user.id) }
diff --git a/spec/requests/api/files_spec.rb b/spec/requests/api/files_spec.rb
index edfe935d985..e84122f2fbc 100644
--- a/spec/requests/api/files_spec.rb
+++ b/spec/requests/api/files_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   let(:user) { create(:user) }
   let!(:project) { create(:project, namespace: user.namespace ) }
   before { project.team << [user, :developer] }
diff --git a/spec/requests/api/internal_spec.rb b/spec/requests/api/internal_spec.rb
index 8797c3fbbbf..dbe8043c633 100644
--- a/spec/requests/api/internal_spec.rb
+++ b/spec/requests/api/internal_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   let(:user) { create(:user) }
   let(:key) { create(:key, user: user) }
   let(:project) { create(:project) }
diff --git a/spec/requests/api/issues_spec.rb b/spec/requests/api/issues_spec.rb
index e62bc844352..dff7f20cb32 100644
--- a/spec/requests/api/issues_spec.rb
+++ b/spec/requests/api/issues_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   let(:user) { create(:user) }
   let!(:project) { create(:project, namespace: user.namespace ) }
   let!(:issue) { create(:issue, author: user, assignee: user, project: project) }
diff --git a/spec/requests/api/merge_requests_spec.rb b/spec/requests/api/merge_requests_spec.rb
index 2fb3684fdf0..3611d9d6dc3 100644
--- a/spec/requests/api/merge_requests_spec.rb
+++ b/spec/requests/api/merge_requests_spec.rb
@@ -2,8 +2,6 @@ require "spec_helper"
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
   let(:user) { create(:user) }
   let!(:project) {create(:project, creator_id: user.id, namespace: user.namespace) }
   let!(:merge_request) { create(:merge_request, :simple, author: user, assignee: user, source_project: project, target_project: project, title: "Test") }
diff --git a/spec/requests/api/milestones_spec.rb b/spec/requests/api/milestones_spec.rb
index 0d2740c5acf..f0619a1c801 100644
--- a/spec/requests/api/milestones_spec.rb
+++ b/spec/requests/api/milestones_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { enable_observers }
-  after(:each) {disable_observers}
-
   let(:user) { create(:user) }
   let!(:project) { create(:project, namespace: user.namespace ) }
   let!(:milestone) { create(:milestone, project: project) }
@@ -92,9 +89,6 @@ describe API::API, api: true  do
   end
 
   describe "PUT /projects/:id/milestones/:milestone_id to test observer on close" do
-    before { enable_observers }
-    after { disable_observers }
-
     it "should create an activity event when an milestone is closed" do
       Event.should_receive(:create)
 
diff --git a/spec/requests/api/namespaces_spec.rb b/spec/requests/api/namespaces_spec.rb
index 2de7d1e23c3..d9d52468b15 100644
--- a/spec/requests/api/namespaces_spec.rb
+++ b/spec/requests/api/namespaces_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   let(:admin) { create(:admin) }
   let!(:group1) { create(:group) }
   let!(:group2) { create(:group) }
diff --git a/spec/requests/api/notes_spec.rb b/spec/requests/api/notes_spec.rb
index 2875db04ee4..7aa53787aed 100644
--- a/spec/requests/api/notes_spec.rb
+++ b/spec/requests/api/notes_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   let(:user) { create(:user) }
   let!(:project) { create(:project, namespace: user.namespace ) }
   let!(:issue) { create(:issue, project: project, author: user) }
@@ -128,14 +125,10 @@ describe API::API, api: true  do
   end
 
   describe "POST /projects/:id/noteable/:noteable_id/notes to test observer on create" do
-    before { enable_observers }
-    after { disable_observers }
-
     it "should create an activity event when an issue note is created" do
       Event.should_receive(:create)
 
       post api("/projects/#{project.id}/issues/#{issue.id}/notes", user), body: 'hi!'
     end
   end
-
 end
diff --git a/spec/requests/api/project_hooks_spec.rb b/spec/requests/api/project_hooks_spec.rb
index 6e281f5a43e..cdb5e3d0612 100644
--- a/spec/requests/api/project_hooks_spec.rb
+++ b/spec/requests/api/project_hooks_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, 'ProjectHooks', api: true  do
   include ApiHelpers
-  before(:each) { enable_observers }
-  after(:each) { disable_observers }
-
   let(:user) { create(:user) }
   let(:user3) { create(:user) }
   let!(:project) { create(:project, creator_id: user.id, namespace: user.namespace) }
diff --git a/spec/requests/api/project_members_spec.rb b/spec/requests/api/project_members_spec.rb
index 032f850010c..3c480c2ac4b 100644
--- a/spec/requests/api/project_members_spec.rb
+++ b/spec/requests/api/project_members_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { enable_observers }
-  after(:each) { disable_observers }
-
   let(:user) { create(:user) }
   let(:user2) { create(:user) }
   let(:user3) { create(:user) }
diff --git a/spec/requests/api/projects_spec.rb b/spec/requests/api/projects_spec.rb
index 415735091c3..41841e855fd 100644
--- a/spec/requests/api/projects_spec.rb
+++ b/spec/requests/api/projects_spec.rb
@@ -2,9 +2,6 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { enable_observers }
-  after(:each) { disable_observers }
-
   let(:user) { create(:user) }
   let(:user2) { create(:user) }
   let(:user3) { create(:user) }
diff --git a/spec/requests/api/repositories_spec.rb b/spec/requests/api/repositories_spec.rb
index 5afb3bddcb7..94850d0f1ae 100644
--- a/spec/requests/api/repositories_spec.rb
+++ b/spec/requests/api/repositories_spec.rb
@@ -3,9 +3,6 @@ require 'mime/types'
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { enable_observers }
-  after(:each) {disable_observers}
-
   let(:user) { create(:user) }
   let(:user2) { create(:user) }
   let!(:project) { create(:project, creator_id: user.id) }
diff --git a/spec/requests/api/services_spec.rb b/spec/requests/api/services_spec.rb
index 684f8615999..f883c9e028a 100644
--- a/spec/requests/api/services_spec.rb
+++ b/spec/requests/api/services_spec.rb
@@ -2,9 +2,6 @@ require "spec_helper"
 
 describe API::API, api: true  do
   include ApiHelpers
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   let(:user) { create(:user) }
   let(:project) {create(:project, creator_id: user.id, namespace: user.namespace) }
 
diff --git a/spec/services/issues/bulk_update_context_spec.rb b/spec/services/issues/bulk_update_context_spec.rb
index 548109a8450..f4c9148f1a3 100644
--- a/spec/services/issues/bulk_update_context_spec.rb
+++ b/spec/services/issues/bulk_update_context_spec.rb
@@ -1,12 +1,9 @@
 require 'spec_helper'
 
 describe Issues::BulkUpdateService do
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   let(:issue) {
     create(:issue, project: @project)
-  } 
+  }
 
   before do
     @user = create :user
@@ -23,7 +20,7 @@ describe Issues::BulkUpdateService do
       @issues = 5.times.collect do
         create(:issue, project: @project)
       end
-      @params = { 
+      @params = {
         update: {
           status: 'closed',
           issues_ids: @issues.map(&:id)
@@ -48,7 +45,7 @@ describe Issues::BulkUpdateService do
       @issues = 5.times.collect do
         create(:closed_issue, project: @project)
       end
-      @params = { 
+      @params = {
         update: {
           status: 'reopen',
           issues_ids: @issues.map(&:id)
@@ -71,7 +68,7 @@ describe Issues::BulkUpdateService do
 
     before do
       @new_assignee = create :user
-      @params = { 
+      @params = {
         update: {
           issues_ids: [issue.id],
           assignee_id: @new_assignee.id
@@ -93,7 +90,7 @@ describe Issues::BulkUpdateService do
 
     before do
       @milestone = create :milestone
-      @params = { 
+      @params = {
         update: {
           issues_ids: [issue.id],
           milestone_id: @milestone.id
diff --git a/spec/services/projects/create_service_spec.rb b/spec/services/projects/create_service_spec.rb
index 0eac6bed74b..3dac0539031 100644
--- a/spec/services/projects/create_service_spec.rb
+++ b/spec/services/projects/create_service_spec.rb
@@ -1,9 +1,6 @@
 require 'spec_helper'
 
 describe Projects::CreateService do
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   describe :create_by_user do
     before do
       @user = create :user
diff --git a/spec/services/projects/image_service_spec.rb b/spec/services/projects/image_service_spec.rb
index 070c21698cf..23c4e227ae3 100644
--- a/spec/services/projects/image_service_spec.rb
+++ b/spec/services/projects/image_service_spec.rb
@@ -1,9 +1,6 @@
 require 'spec_helper'
 
 describe Projects::ImageService do
-  before(:each) { enable_observers }
-  after(:each) { disable_observers }
-
   describe 'Image service' do
     before do
       @user = create :user
diff --git a/spec/services/projects/transfer_service_spec.rb b/spec/services/projects/transfer_service_spec.rb
index 563a8b0c01c..2508dfc4565 100644
--- a/spec/services/projects/transfer_service_spec.rb
+++ b/spec/services/projects/transfer_service_spec.rb
@@ -1,9 +1,6 @@
 require 'spec_helper'
 
 describe Projects::TransferService do
-  before(:each) { enable_observers }
-  after(:each) {disable_observers}
-
   let(:user) { create(:user) }
   let(:group) { create(:group) }
   let(:group2) { create(:group) }
diff --git a/spec/services/projects/update_service_spec.rb b/spec/services/projects/update_service_spec.rb
index 1854c0d8233..bb0470e3771 100644
--- a/spec/services/projects/update_service_spec.rb
+++ b/spec/services/projects/update_service_spec.rb
@@ -1,9 +1,6 @@
 require 'spec_helper'
 
 describe Projects::UpdateService do
-  before(:each) { ActiveRecord::Base.observers.enable(:user_observer) }
-  after(:each) { ActiveRecord::Base.observers.disable(:user_observer) }
-
   describe :update_by_user do
     before do
       @user = create :user
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 65a641bcf12..2181238ae9f 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -43,7 +43,7 @@ RSpec.configure do |config|
   # instead of true.
 
   config.before(:suite) do
-    TestEnv.init(observers: false, init_repos: true, repos: false)
+    TestEnv.init(init_repos: true, repos: false)
   end
   config.before(:each) do
     TestEnv.setup_stubs
diff --git a/spec/support/login_helpers.rb b/spec/support/login_helpers.rb
index cc0ec2f4e3d..7713e9f17d7 100644
--- a/spec/support/login_helpers.rb
+++ b/spec/support/login_helpers.rb
@@ -3,9 +3,7 @@ module LoginHelpers
   #
   # role - User role (e.g., :admin, :user)
   def login_as(role)
-    ActiveRecord::Base.observers.enable(:user_observer) do
-      @user = create(role)
-    end
+    @user = create(role)
 
     login_with(@user)
   end
diff --git a/spec/support/test_env.rb b/spec/support/test_env.rb
index b1bb65a836e..85059dfa9e9 100644
--- a/spec/support/test_env.rb
+++ b/spec/support/test_env.rb
@@ -17,14 +17,6 @@ module TestEnv
   def init(opts = {})
     RSpec::Mocks::setup(self)
 
-    # Disable observers to improve test speed
-    #
-    # You can enable it in whole test case where needed by next string:
-    #
-    #   before(:each) { enable_observers }
-    #
-    disable_observers if opts[:observers] == false
-
     # Disable mailer for spinach tests
     disable_mailer if opts[:mailer] == false
     setup_stubs
@@ -33,14 +25,6 @@ module TestEnv
     setup_test_repos(opts) if opts[:repos] == true
   end
 
-  def enable_observers
-    ActiveRecord::Base.observers.enable(:all)
-  end
-
-  def disable_observers
-    ActiveRecord::Base.observers.disable(:all)
-  end
-
   def disable_mailer
     NotificationService.any_instance.stub(mailer: double.as_null_object)
   end
@@ -89,10 +73,6 @@ module TestEnv
     Repository.any_instance.stub(
       size: 12.45
     )
-
-    BaseObserver.any_instance.stub(
-      current_user: double("current_user", id: 1)
-    )
   end
 
   def clear_repo_dir(namespace, name)