Fix conflicting redirect search

app/models/redirect_route.rb

@@ -8,5 +8,5 @@ class RedirectRoute < ActiveRecord::Base
     presence: true,
     uniqueness: { case_sensitive: false }
 
-  scope :matching_path_and_descendants, -> (path) { where('redirect_routes.path = ? OR redirect_routes.path LIKE ?', path, "#{sanitize_sql_like(path)}/%") }
+  scope :matching_path_and_descendants, -> (path) { where('LOWER(redirect_routes.path) = LOWER(?) OR LOWER(redirect_routes.path) LIKE LOWER(?)', path, "#{sanitize_sql_like(path)}/%") }
 end

spec/models/redirect_route_spec.rb

@@ -20,8 +20,16 @@ describe RedirectRoute do
     let!(:redirect4) { group.redirect_routes.create(path: 'gitlabb/test/foo/bar') }
     let!(:redirect5) { group.redirect_routes.create(path: 'gitlabb/test/baz') }
 
+    context 'when the redirect route matches with same casing' do
       it 'returns correct routes' do
         expect(described_class.matching_path_and_descendants('gitlabb/test')).to match_array([redirect2, redirect3, redirect4, redirect5])
       end
     end
+
+    context 'when the redirect route matches with different casing' do
+      it 'returns correct routes' do
+        expect(described_class.matching_path_and_descendants('GitLABB/test')).to match_array([redirect2, redirect3, redirect4, redirect5])
+      end
+    end
+  end
 end

spec/models/route_spec.rb

@@ -145,11 +145,13 @@ describe Route do
 
   describe '#delete_conflicting_redirects' do
     context 'when a redirect route with the same path exists' do
+      context 'when the redirect route has matching case' do
         let!(:redirect1) { route.create_redirect(route.path) }
 
         it 'deletes the redirect' do
+          expect do
             route.delete_conflicting_redirects
-        expect(route.conflicting_redirects).to be_empty
+          end.to change{RedirectRoute.count}.by(-1)
         end
 
         context 'when redirect routes with paths descending from the route path exists' do
@@ -159,19 +161,35 @@ describe Route do
           let!(:other_redirect) { route.create_redirect("other") }
 
           it 'deletes all redirects with paths that descend from the route path' do
+            expect do
               route.delete_conflicting_redirects
-          expect(route.conflicting_redirects).to be_empty
+            end.to change{RedirectRoute.count}.by(-4)
+          end
+        end
+      end
+
+      context 'when the redirect route is differently cased' do
+        let!(:redirect1) { route.create_redirect(route.path.upcase) }
+
+        it 'deletes the redirect' do
+          expect do
+            route.delete_conflicting_redirects
+          end.to change{RedirectRoute.count}.by(-1)
         end
       end
     end
   end
 
   describe '#conflicting_redirects' do
+    it 'returns an ActiveRecord::Relation' do
+      expect(route.conflicting_redirects).to be_an(ActiveRecord::Relation)
+    end
+
     context 'when a redirect route with the same path exists' do
+      context 'when the redirect route has matching case' do
         let!(:redirect1) { route.create_redirect(route.path) }
 
         it 'returns the redirect route' do
-        expect(route.conflicting_redirects).to be_an(ActiveRecord::Relation)
           expect(route.conflicting_redirects).to match_array([redirect1])
         end
 
@@ -182,10 +200,18 @@ describe Route do
           let!(:other_redirect) { route.create_redirect("other") }
 
           it 'returns the redirect routes' do
-          expect(route.conflicting_redirects).to be_an(ActiveRecord::Relation)
             expect(route.conflicting_redirects).to match_array([redirect1, redirect2, redirect3, redirect4])
           end
         end
       end
+
+      context 'when the redirect route is differently cased' do
+        let!(:redirect1) { route.create_redirect(route.path.upcase) }
+
+        it 'returns the redirect route' do
+          expect(route.conflicting_redirects).to match_array([redirect1])
+        end
+      end
+    end
   end
 end