insert query builder has many to many progress

test/backends/SessionInsertHasManyToManyTest.cpp

@@ -0,0 +1,40 @@
+#include "catch2/catch_test_macros.hpp"
+
+#include "SessionFixture.hpp"
+
+#include "connection.hpp"
+
+#include "models/recipe.hpp"
+
+using namespace matador;
+using namespace matador::object;
+using namespace matador::test;
+
+TEST_CASE_METHOD(SessionFixture, "Test insert object with has many to many relation", "[session][insert][has_many_to_many]") {
+  auto result = schema.attach<recipe>("recipes")
+    .and_then( [this] { return schema.attach<ingredient>("ingredients"); } )
+    .and_then([this] { return schema.create(db); } );
+
+  orm::session ses({bus, connection::dns, 4}, schema);
+
+  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]})
+  };
+
+  for (auto &r: recipes) {
+    auto res = ses.insert(r);
+    REQUIRE(res.is_ok());
+  }
+}