collection_resolver progress

test/models/author.hpp

@@ -4,6 +4,7 @@
 #include "matador/utils/access.hpp"
 
 #include "matador/object/object_ptr.hpp"
+#include "matador/object/collection.hpp"
 
 #include <string>
 #include <vector>
@@ -25,7 +26,7 @@ struct author {
   std::string date_of_birth;
   unsigned short year_of_birth{};
   bool distinguished{false};
-  std::vector<object::object_ptr<book> > books;
+  object::collection<object::object_ptr<book> > books;
 
   template<typename Operator>
   void process(Operator &op) {

test/models/department.hpp

@@ -2,6 +2,7 @@
 #define DEPARTMENT_EMPLOYEE_HPP
 
 #include "matador/object/object_ptr.hpp"
+#include "matador/object/collection.hpp"
 
 #include <string>
 #include <vector>
@@ -16,7 +17,7 @@ struct department {
     : id(id), name(std::move(name)) {}
     unsigned int id{};
     std::string name;
-    std::vector<object::object_ptr<employee>> employees{};
+    object::collection<object::object_ptr<employee>> employees{};
     // object::object_ptr<employee> manager;
 
     template<typename Operator>