#1275 Fix issue with command batching that prevents query rematching

flecs.c

@@ -9828,6 +9828,10 @@ void flecs_cmd_batch_for_entity(
  flecs_notify_on_add(world, table, start_table, 
  ECS_RECORD_TO_ROW(r->row), 1, &added, 0, set_mask, true);
  flecs_defer_end(world, world->stages[0]);
+ if (r->row & EcsEntityIsTraversable) {
+ /* Update monitors since we didn't do this in flecs_commit. */
+ flecs_update_component_monitors(world, &added, NULL);
+ }
  }
 
  diff->added.array = added.array;

src/entity.c

@@ -4832,6 +4832,10 @@ void flecs_cmd_batch_for_entity(
  flecs_notify_on_add(world, table, start_table, 
  ECS_RECORD_TO_ROW(r->row), 1, &added, 0, set_mask, true);
  flecs_defer_end(world, world->stages[0]);
+ if (r->row & EcsEntityIsTraversable) {
+ /* Update monitors since we didn't do this in flecs_commit. */
+ flecs_update_component_monitors(world, &added, NULL);
+ }
  }
 
  diff->added.array = added.array;

test/query/project.json

@@ -1468,7 +1468,8 @@
  "match_empty_table_up_implicit_isa",
  "match_empty_table_up_written_implicit_isa",
  "match_empty_table_up_isa",
- "match_empty_table_up_written_isa"
+ "match_empty_table_up_written_isa",
+ "up_after_add_batched_to_parent"
  ]
  }, {
  "id": "Cascade",

test/query/src/Traversal.c

@@ -8716,3 +8716,40 @@ void Traversal_match_empty_table_up_written_isa(void) {
 
  ecs_fini(world);
 }
+
+void Traversal_up_after_add_batched_to_parent(void) {
+ ecs_world_t *world = ecs_init();
+
+ ECS_TAG(world, Foo);
+ ECS_TAG(world, Bar);
+
+ ecs_query_t *q = ecs_query(world, {
+ .terms = {
+ { .id = Foo, .src.id = EcsUp }
+ },
+ .cache_kind = cache_kind
+ });
+
+ test_assert(q != NULL);
+
+ ecs_entity_t e1 = ecs_new(world);
+ ecs_entity_t e2 = ecs_new(world);
+ ecs_add_pair(world, e2, EcsChildOf, e1);
+
+ ecs_defer_begin(world);
+ ecs_add(world, e1, Foo);
+ ecs_add(world, e1, Bar);
+ ecs_defer_end(world);
+
+ ecs_iter_t it = ecs_query_iter(world, q);
+ test_bool(true, ecs_query_next(&it));
+ test_int(it.count, 1);
+ test_uint(it.entities[0], e2);
+ test_uint(Foo, ecs_field_id(&it, 0));
+ test_uint(e1, ecs_field_src(&it, 0));
+ test_bool(true, ecs_field_is_set(&it, 0));
+
+ test_bool(false, ecs_query_next(&it));
+
+ ecs_fini(world);
+}