Improve performance of application for large teams

This commit fixes a lot of sql queries to db for for groups and projects
with big amount of members.
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

CHANGELOG

@@ -17,6 +17,7 @@ v 7.0.0
   - UI improvements
   - Case-insensetive search for issues
   - Update to rails 4.1
+  - Improve performance of application for projects and groups with a lot of members
 
 v 6.9.2
   - Revert the commit that broke the LDAP user filter

app/models/ability.rb

@@ -71,16 +71,16 @@ class Ability
       team = project.team
 
       # Rules based on role in project
-      if team.masters.include?(user)
+      if team.master?(user)
         rules += project_master_rules
 
-      elsif team.developers.include?(user)
+      elsif team.developer?(user)
         rules += project_dev_rules
 
-      elsif team.reporters.include?(user)
+      elsif team.reporter?(user)
         rules += project_report_rules
 
-      elsif team.guests.include?(user)
+      elsif team.guest?(user)
         rules += project_guest_rules
       end
 

app/models/project_team.rb

@@ -117,6 +117,22 @@ class ProjectTeam
     false
   end
 
+  def guest?(user)
+    find_tm(user.id).access_field == Gitlab::Access::GUEST
+  end
+
+  def reporter?(user)
+    find_tm(user.id).access_field == Gitlab::Access::REPORTER
+  end
+
+  def developer?(user)
+    find_tm(user.id).access_field == Gitlab::Access::DEVELOPER
+  end
+
+  def master?(user)
+    find_tm(user.id).access_field == Gitlab::Access::MASTER
+  end
+
   private
 
   def fetch_members(level = nil)

spec/models/project_team_spec.rb

 require "spec_helper"
 
 describe ProjectTeam do
-  let(:team) { create(:project).team }
+  let(:group) { create(:group) }
+  let(:project) { create(:empty_project, group: group) }
 
-  describe "Respond to" do
-    subject { team }
+  let(:master) { create(:user) }
+  let(:reporter) { create(:user) }
+  let(:guest) { create(:user) }
+  let(:nonmember) { create(:user) }
 
-    it { should respond_to(:developers) }
-    it { should respond_to(:masters) }
-    it { should respond_to(:reporters) }
-    it { should respond_to(:guests) }
+  before do
+    group.add_user(master, Gitlab::Access::MASTER)
+    group.add_user(reporter, Gitlab::Access::REPORTER)
+    group.add_user(guest, Gitlab::Access::GUEST)
+
+    # Add group guest as master to this project
+    # to test project access priority over group members
+    project.team << [guest, :master]
+  end
+
+  describe 'members collection' do
+    it { team.masters.should include(master) }
+    it { team.masters.should include(guest) }
+    it { team.masters.should_not include(reporter) }
+    it { team.masters.should_not include(nonmember) }
+  end
+
+  describe 'access methods' do
+    it { team.master?(master).should be_true }
+    it { team.master?(guest).should be_true }
+    it { team.master?(reporter).should be_false }
+    it { team.master?(nonmember).should be_false }
   end
 end