template<class O, class T, class ...Op> internal::column_t<O, T, Op...> make_column(const std::string &name, T O::*m, Op ...constraints); template<class O, class T, class ...Op> internal::column_t<O, T, Op...> make_column(const std::string &name, void (O::*setter)(T), const T& (O::*getter)() const, Op ...constraints); template<class O, class T, class ...Op> internal::column_t<O, T, Op...> make_column(const std::string &name, const T& (O::*getter)() const, void (O::*setter)(T), Op ...constraints);
Creates column objects used as make_table function argument. There are two ways to make a column: with member pointer and with member function pointer. First overload is used to create a column with member pointer. The second and the third are used to create a column with setter and getter member function pointers. First way is used to map public members, second - to map private and protected members with public setters and getters.
(1) name Column name from database.
(2) m Member pointer mapped to this column. Example: &User::id.
(3) options Extra options used to specify column more precisely. For example: primary_key, autoincrement and default_value.
(4) setter Setter function pointer. Must return void, have only one argument of type T and be non-const.
(5) getter Getter function pointer. Must return const T&, have 0 arguments and be const.
column_t<O, T, Op...> instance.
struct Employee {
int id;
std::string name;
int age;
std::shared_ptr<std::string> address; // optional
std::shared_ptr<double> salary; // optional
};
using namespace sqlite_orm;
auto storage = make_storage("make_storage_example.sqlite",
make_table("COMPANY",
make_column("ID",
&Employee::id,
primary_key()),
make_column("NAME",
&Employee::name),
make_column("AGE",
&Employee::age),
make_column("ADDRESS",
&Employee::address),
make_column("SALARY",
&Employee::salary)));
For mapping private/protected members please check out the example
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