Fixes #38862 - Handle nil host UUIDs properly

Author: sjha4

lib/smart_proxy_container_gateway/container_gateway_api.rb

@@ -262,7 +262,8 @@ class Api < ::Sinatra::Base
         database.connection.transaction(isolation: :serializable, retry_on: [Sequel::SerializationFailure]) do
           hosts_table = database.connection[:hosts]
           hosts_table.delete
-          hosts_table.import(%i[uuid], hosts.map { |host| [host['uuid']] })
+          valid_hosts = hosts.filter_map { |host| [host['uuid']] if host['uuid'].present? }
+          hosts_table.import(%i[uuid], valid_hosts) unless valid_hosts.empty?
         end
         {}
       end
@@ -277,6 +278,8 @@ class Api < ::Sinatra::Base
         do_authorize_any
         params['hosts'].flat_map do |host_map|
           host_map.filter_map do |host_uuid, repos|
+            next if host_uuid.nil? || host_uuid.to_s.strip.empty?
+
             if repos.nil? || repos.empty?
               repo_names = []
             else

lib/smart_proxy_container_gateway/container_gateway_main.rb

@@ -214,6 +214,8 @@ def build_host_repository_mapping(host_repo_maps)
       end
 
       def build_host_entries(hosts, repositories, host_uuid, repos)
+        return if host_uuid.nil? || host_uuid.to_s.strip.empty?
+
         host = hosts[{ uuid: host_uuid }]
         return unless host
         return if repos.nil? || repos.empty?
@@ -232,7 +234,11 @@ def extract_auth_required_repo_names(repos)
       end
 
       def update_host_repositories(uuid, repositories)
+        return if uuid.nil? || uuid.to_s.strip.empty?
+
         host = find_or_create_host(uuid)
+        return unless host
+
         hosts_repositories = database.connection[:hosts_repositories]
         database.connection.transaction(isolation: :serializable,
                                         retry_on: [Sequel::SerializationFailure],

test/container_gateway_api_test.rb

@@ -427,4 +427,68 @@ def test_flatpak_static_index_server_error
     assert_equal 500, last_response.status
     assert_equal '{"error": "internal server error"}', last_response.body
   end
+
+  def test_update_hosts_filters_nil_uuids
+    hosts = [
+      { 'uuid' => 'host-uuid-1' },
+      { 'uuid' => nil },
+      { 'uuid' => 'host-uuid-2' }
+    ]
+
+    put '/update_hosts', { 'hosts' => hosts }
+    assert last_response.ok?
+
+    # Verify only valid hosts were inserted (old behavior would have failed or inserted nil)
+    assert @database.connection[:hosts].count >= 2
+    assert_not_nil @database.connection[:hosts].first(uuid: 'host-uuid-1')
+    assert_not_nil @database.connection[:hosts].first(uuid: 'host-uuid-2')
+  end
+
+  def test_update_hosts_filters_empty_string_uuids
+    hosts = [
+      { 'uuid' => 'host-uuid-1' },
+      { 'uuid' => '' },
+      { 'uuid' => 'host-uuid-2' }
+    ]
+
+    put '/update_hosts', { 'hosts' => hosts }
+    assert last_response.ok?
+
+    # Verify only valid hosts were inserted
+    assert @database.connection[:hosts].count >= 2
+    assert_not_nil @database.connection[:hosts].first(uuid: 'host-uuid-1')
+    assert_not_nil @database.connection[:hosts].first(uuid: 'host-uuid-2')
+  end
+
+  def test_update_hosts_handles_missing_uuid_key
+    hosts = [
+      { 'uuid' => 'host-uuid-1' },
+      { 'name' => 'host-without-uuid' },
+      { 'uuid' => 'host-uuid-2' }
+    ]
+
+    put '/update_hosts', { 'hosts' => hosts }
+    assert last_response.ok?
+
+    # Verify only valid hosts were inserted
+    assert @database.connection[:hosts].count >= 2
+    assert_not_nil @database.connection[:hosts].first(uuid: 'host-uuid-1')
+    assert_not_nil @database.connection[:hosts].first(uuid: 'host-uuid-2')
+  end
+
+  def test_update_hosts_with_empty_array
+    put '/update_hosts', { 'hosts' => [] }
+    assert last_response.ok?
+  end
+
+  def test_update_hosts_with_all_invalid_uuids
+    hosts = [
+      { 'uuid' => nil },
+      { 'uuid' => '' },
+      { 'name' => 'no-uuid' }
+    ]
+
+    put '/update_hosts', { 'hosts' => hosts }
+    assert last_response.ok?
+  end
 end