Scope User and MiqGroup searches within the current region

https://bugzilla.redhat.com/show_bug.cgi?id=1529995

app/models/mixins/miq_request_mixin.rb

@@ -31,7 +31,7 @@ def get_option_last(key)
   end
 
   def get_user
-    @user ||= User.find_by(:userid => userid).tap do |u|
+    @user ||= User.in_my_region.find_by(:userid => userid).tap do |u|
       u.current_group_by_description = options[:requester_group] if options[:requester_group]
     end
   end

app/models/user.rb

@@ -107,7 +107,7 @@ def validate
   def current_group_by_description=(group_description)
     if group_description
       desired_group = miq_groups.detect { |g| g.description == group_description }
-      desired_group ||= MiqGroup.find_by(:description => group_description) if super_admin_user?
+      desired_group ||= MiqGroup.in_region(region_id).find_by(:description => group_description) if super_admin_user?
       self.current_group = desired_group if desired_group
     end
   end

spec/models/mixins/miq_request_mixin.rb

@@ -0,0 +1,22 @@
+describe MiqRequestMixin do
+  let(:test_class) do
+    Class.new do
+      attr_accessor :options, :userid
+      include MiqRequestMixin
+
+      def initialize
+        @options = {}
+      end
+    end
+  end
+
+  let(:test_instance) { test_class.new }
+
+  it "#get_user only searches users in the current region" do
+    user = FactoryGirl.create(:user, :userid => "TestUser")
+    FactoryGirl.create(:user, :userid => "TestUser", :id => ApplicationRecord.id_in_region(1, ApplicationRecord.my_region_number + 1))
+
+    test_instance.userid = "TestUser"
+    expect(test_instance.get_user).to eq(user)
+  end
+end

spec/models/user_spec.rb

@@ -453,6 +453,15 @@
         subject.current_group_by_description = g2.description
         expect(subject.current_group).to eq(g2)
       end
+
+      it "ignores groups from other regions" do
+        expect(subject).to be_super_admin_user
+
+        group = FactoryGirl.create(:miq_group, :id => ApplicationRecord.id_in_region(1, ApplicationRecord.my_region_number + 1))
+
+        subject.current_group_by_description = group.description
+        expect(subject.current_group.description).not_to eq(group.description)
+      end
     end
   end