collection resolver progress

test/backends/QueryTest.cpp

@@ -588,10 +588,8 @@ TEST_CASE_METHOD(QueryFixture, "Test load entity with eager has many relation",
 }
 
 TEST_CASE_METHOD(QueryFixture, "Test load entity with lazy has many relation", "[query][has_many][lazy]") {
-  // auto result = repo.attach<author>("authors")
-  // .and_then( [this] { return repo.attach<book>("books"); } )
-  auto result = repo.attach<book>("books")
-  .and_then( [this] { return repo.attach<author>("authors"); } )
+  auto result = repo.attach<author>("authors")
+  .and_then( [this] { return repo.attach<book>("books"); } )
   .and_then([this] {
     return repo.create(db);
   } );
@@ -662,6 +660,13 @@ TEST_CASE_METHOD(QueryFixture, "Test load entity with lazy has many relation", "
     REQUIRE(a->year_of_birth == authors.at(index)->year_of_birth);
     REQUIRE(a->distinguished == authors.at(index)->distinguished);
     REQUIRE(!a->books.empty());
+    for (const auto& b : a->books) {
+      const auto title = b->title;
+      // REQUIRE(b->id == books.at(index)->id);
+      // REQUIRE(b->title == books.at(index)->title);
+      // REQUIRE(b->author_id == books.at(index)->author_id);
+      // REQUIRE(b->published_in == books.at(index)->published_in);
+    }
     ++index;
   }
 }
@@ -735,11 +740,12 @@ TEST_CASE_METHOD(QueryFixture, "Test load entity with lazy belongs to relation",
 }
 
 TEST_CASE_METHOD(QueryFixture, "Test load entity with eager belongs to relation", "[query][belongs_to][eager]") {
-  auto result = repo.attach<author>("authors")
-  .and_then( [this] { return repo.attach<book>("books"); } )
-  .and_then([this] {
-    return repo.create(db);
-  } );
+  // auto result = repo.attach<author>("authors")
+  // .and_then( [this] { return repo.attach<book>("books"); } )
+  auto result = repo.attach<book>("books")
+    .and_then( [this] { return repo.attach<author>("authors"); })
+    .and_then([this] { return repo.create(db); });
+  REQUIRE(result.is_ok());
 
   const std::vector authors {
     object_ptr{std::make_shared<author>(1, "Michael", "Crichton", "23.10.1942", 1975, true)},