#ifndef SQLGEN_BUILD_DRY_TESTS_ONLY #include #include #include #include #include #include #include namespace test_range_select_from { struct Person { sqlgen::PrimaryKey id; std::string first_name; std::string last_name; int age; }; TEST(postgres, test_range_select_from) { static_assert(std::ranges::input_range>, "Must be an input range."); const auto people1 = std::vector( {Person{ .id = 0, .first_name = "Homer", .last_name = "Simpson", .age = 45}, Person{.id = 1, .first_name = "Bart", .last_name = "Simpson", .age = 10}, Person{.id = 2, .first_name = "Lisa", .last_name = "Simpson", .age = 8}, Person{ .id = 3, .first_name = "Maggie", .last_name = "Simpson", .age = 0}}); const auto credentials = sqlgen::postgres::Credentials{.user = "postgres", .password = "password", .host = "localhost", .dbname = "postgres"}; using namespace sqlgen; using namespace sqlgen::literals; const auto conn = sqlgen::postgres::connect(credentials).and_then(drop | if_exists); const auto people2 = sqlgen::write(conn, people1) .and_then(select_from("first_name"_c) | order_by("id"_c)) .value(); using namespace std::ranges::views; const auto first_names = internal::collect::vector(people2 | transform([](const auto& _r) { return rfl::get<"first_name">(_r.value()); })); EXPECT_EQ(first_names.at(0), "Homer"); EXPECT_EQ(first_names.at(1), "Bart"); EXPECT_EQ(first_names.at(2), "Lisa"); EXPECT_EQ(first_names.at(3), "Maggie"); } } // namespace test_range_select_from #endif