Fixed error with apply_locks method [skip ci]

Author: ankane

CHANGELOG.md

@@ -1,6 +1,6 @@
 ## 0.18.0 (unreleased)
 
-- Fixed error with `set_allowed_vehicles_for_index` method
+- Fixed error with `apply_locks` and `set_allowed_vehicles_for_index` methods
 - Dropped support for Ruby < 3.3
 
 ## 0.17.1 (2026-02-19)

ext/or-tools/routing.cpp

@@ -458,7 +458,11 @@ void init_routing(Rice::Module& m) {
           throw std::runtime_error{"Unknown solver status"};
         }
       })
-    .define_method("apply_locks", &RoutingModel::ApplyLocks)
+    .define_method(
+      "apply_locks",
+      [](RoutingModel& self, const std::vector<int64_t>& locks) {
+        return self.ApplyLocks(locks);
+      })
     .define_method("apply_locks_to_all_vehicles", &RoutingModel::ApplyLocksToAllVehicles)
     .define_method("pre_assignment", &RoutingModel::PreAssignment)
     .define_method("mutable_pre_assignment", &RoutingModel::MutablePreAssignment)

test/routing_test.rb

@@ -914,4 +914,10 @@ def test_set_allowed_vehicles_for_index
     routing = ORTools::RoutingModel.new(manager)
     assert_nil routing.set_allowed_vehicles_for_index([0], 0)
   end
+
+  def test_apply_locks
+    manager = ORTools::RoutingIndexManager.new(1, 1, 0)
+    routing = ORTools::RoutingModel.new(manager)
+    assert_nil routing.apply_locks([])
+  end
 end