session and insert query builder has many to many progress

test/orm/query/InsertQueryBuilderTest.cpp

@@ -18,6 +18,7 @@
 #include "../../models/book.hpp"
 #include "../../models/airplane.hpp"
 #include "../../models/flight.hpp"
+#include "../../models/recipe.hpp"
 
 using namespace matador::object;
 using namespace matador::sql;
@@ -112,4 +113,41 @@ TEST_CASE("Test insert builder has many", "[query][insert_query_builder][has_man
   const auto& stmts = *build_result;
   REQUIRE_FALSE(stmts.empty());
   REQUIRE(stmts.size() == 6);
+}
+
+TEST_CASE("Test insert builder has many to many", "[query][insert_query_builder][many_to_many]") {
+  using namespace matador::test;
+  backend_provider::instance().register_backend("noop", std::make_unique<orm::test_backend_service>());
+  connection db("noop://noop.db");
+
+  schema scm;
+  const auto result = scm.attach<recipe>("recipes")
+    .and_then( [&scm] { return scm.attach<ingredient>("ingredients"); } );
+  REQUIRE(result.is_ok());
+
+  const std::vector ingredients {
+    make_object<ingredient>(1, "Apple"),
+    make_object<ingredient>(2, "Strawberry"),
+    make_object<ingredient>(3, "Pineapple"),
+    make_object<ingredient>(4, "Sugar"),
+    make_object<ingredient>(5, "Flour"),
+    make_object<ingredient>(6, "Butter"),
+    make_object<ingredient>(7, "Beans")
+  };
+
+  std::vector recipes {
+    make_object<recipe>(1, "Apple Pie", std::vector{ingredients[0], ingredients[3], ingredients[4]}),
+    make_object<recipe>(2, "Strawberry Cake", std::vector{ingredients[5], ingredients[6]}),
+    make_object<recipe>(3, "Pineapple Pie", std::vector{ingredients[0], ingredients[1], ingredients[2]})
+  };
+
+  const auto contexts_by_type = to_contexts_by_name(scm, db.dialect());
+  insert_query_builder<recipe> iqb(scm, contexts_by_type);
+
+  auto build_result = iqb.build(recipes[0]);
+  REQUIRE(build_result.is_ok());
+
+  const auto& stmts = *build_result;
+  REQUIRE_FALSE(stmts.empty());
+  REQUIRE(stmts.size() == 7);
 }