has many fetch with join

test/backends/SessionTest.cpp

@@ -197,6 +197,9 @@ TEST_CASE_METHOD(SessionFixture, "Use session to find all objects with one-to-ma
 
   all_departments = find_result.release();
   for (auto it = all_departments.begin(); it != all_departments.end(); ++it) {
-      std::cout << "department: " << it->name << " (employees: " << it->employees.size() << ")\n";
+      std::cout << "department: " << it->name << " (id: " << it->id << ", employees: " << it->employees.size() << ")\n";
+      for (const auto& emp : it->employees) {
+          std::cout << "\temployee: " << emp->first_name << " " << emp->last_name << "( " << emp->id << ")\n";
+      }
   }
 }