stricter registration of fields in a table?

[denzor200]

How about this?

#include <sqlite_orm/sqlite_orm.h>

using namespace sqlite_orm;

struct User {
  std::string username;
  std::string password;
  bool isActive;
};

struct User2 : User {};
struct User3 : User {};

int main() {
  auto storage = make_storage(
      "storage.sqlite", ///

      /// ALL RIGHT: all fields were registered
      make_table("users", ///
                 make_column("username", &User::username, primary_key()),
                 make_column("password", &User::password),
                 make_column("isActive", &User::isActive)),

      /// ALL RIGHT: 'isActive' field were ignored, other fields were registered
      make_table("users2", ///
                 make_column("username", &User2::username, primary_key()),
                 make_column("password", &User2::password),
                 ignored(&User2::isActive)),

      /// FAILED: 'isActive' field was skipped
      make_table("users3", ///
                 make_column("username", &User3::username, primary_key()),
                 make_column("password", &User3::password))

  );
  return 0;
}

compatibility with the previous version will be lost a little .. But I think it's worth it.

[fnc12]

Thanks for submitting this.
Two questions:

1. what profit we will get?
2. how to implement this?

[denzor200]

1. On a large number of tables, it is very easy to miss the "make_column" and suffer sitting in the debugger (
2. It is not easy, but it is possible. Let's take a look at the "pfr" library, implemented in pure C++14, with no additional dependencies. I believe that we can repeat.
   https://github.com/boostorg/pfr

[fnc12]

1. It will be fixed in this Reverse engineering complex databases - automatically generate storage definition and data structures #450 . Probably you'll like it more
2. prf looks like magic_get by Anton Polukhin from yandex company. This is a great library and Anton is a brilliant C++ coder but there is not need to add magic_get's functionality in sqlite_orm if we can solve it using codegen.

[denzor200]

Ok. I have no answers