added join_column_collector and implemented inverse has_many_to_many

test/CMakeLists.txt

@@ -19,7 +19,7 @@ add_executable(tests
   BackendProviderTest.cpp
   models/product.hpp
   models/order.hpp
-  models/order_details.h
+  models/order_details.hpp
   ColumnDefinitionGeneratorTest.cpp
   ColumnGeneratorTest.cpp
   ValueGeneratorTest.cpp
@@ -42,7 +42,8 @@ add_executable(tests
   ValueTest.cpp
   ResultTest.cpp
   utils/auto_reset_event.hpp
-  utils/auto_reset_event.cpp)
+  utils/auto_reset_event.cpp
+  models/student.hpp)
 
 target_link_libraries(tests PRIVATE
   Catch2::Catch2WithMain