diff --git a/app/controllers/groups_controller.rb b/app/controllers/groups_controller.rb
index 486b0bee0cb..4a05434c783 100644
--- a/app/controllers/groups_controller.rb
+++ b/app/controllers/groups_controller.rb
@@ -50,7 +50,7 @@ class GroupsController < ApplicationController
   end
 
   def people
-    @users = group.projects.map(&:users).flatten.uniq
+    @users = group.users
   end
 
   protected
diff --git a/app/models/group.rb b/app/models/group.rb
index 1bb805e8caf..628d00092cd 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -23,10 +23,14 @@ class Group < ActiveRecord::Base
   delegate :name, to: :owner, allow_nil: true, prefix: true
 
   def self.search query
-    where("name like :query or code like :query", query: "%#{query}%")
+    where("name like :query OR code like :query", query: "%#{query}%")
   end
 
   def to_param
     code
   end
+
+  def users
+    User.joins(:users_projects).where('users_projects.project_id' => project_ids).uniq
+  end
 end
diff --git a/app/models/project.rb b/app/models/project.rb
index f525f292222..c00bb4563fd 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -30,15 +30,15 @@ class Project < ActiveRecord::Base
 
   # Scopes
   scope :public_only, where(private_flag: false)
-  scope :without_user, ->(user) { where("id not in (:ids)", ids: user.projects.map(&:id) ) }
-  scope :not_in_group, ->(group) { where("id not in (:ids)", ids: group.project_ids ) }
+  scope :without_user, ->(user)  { where("id NOT IN (:ids)", ids: user.projects.map(&:id) ) }
+  scope :not_in_group, ->(group) { where("id NOT IN (:ids)", ids: group.project_ids ) }
 
   def self.active
     joins(:issues, :notes, :merge_requests).order("issues.created_at, notes.created_at, merge_requests.created_at DESC")
   end
 
   def self.search query
-    where("name like :query or code like :query or path like :query", query: "%#{query}%")
+    where("name like :query OR code like :query OR path like :query", query: "%#{query}%")
   end
 
   def self.create_by_user(params, user)