added more tests

test/models/student.hpp

@@ -0,0 +1,62 @@
+#ifndef QUERY_STUDENT_HPP
+#define QUERY_STUDENT_HPP
+
+#include "matador/utils/access.hpp"
+#include "matador/utils/foreign_attributes.hpp"
+
+#include "matador/object/object_ptr.hpp"
+#include "matador/object/many_to_many_relation.hpp"
+
+#include <utility>
+#include <vector>
+
+namespace matador::test {
+
+struct course;
+
+struct student {
+    unsigned int id{};
+    std::string name;
+    std::vector<matador::object::object_ptr<course>> courses;
+
+    student() = default;
+    explicit student(unsigned int id, std::string name)
+      : id(id)
+      , name(std::move(name)) {}
+
+    template < class Operator >
+    void process(Operator &op) {
+        namespace field = matador::access;
+        field::primary_key(op, "id", id);
+        field::attribute(op, "name", name, 255);
+        // field::has_many_to_many(op, "student_courses", courses, "student_id", "course_id", utils::fetch_type::LAZY);
+    }
+
+};
+
+struct course {
+    unsigned int id{};
+    std::string title;
+    std::vector<matador::object::object_ptr<student>> students;
+
+    course() = default;
+    explicit course(unsigned int id, std::string title)
+    : id(id)
+    , title(std::move(title)) {}
+
+    template < class Operator >
+    void process(Operator &op) {
+        namespace field = matador::access;
+        field::primary_key(op, "id", id);
+        field::attribute(op, "title", title, 255);
+        // field::has_many_to_many(op, "student_courses", students, utils::fetch_type::EAGER);
+    }
+};
+
+class student_course : public object::many_to_many_relation<student, course> {
+public:
+    student_course() : many_to_many_relation("student_id", "course_id") {}
+};
+
+}
+#endif //QUERY_STUDENT_HPP