81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
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/**
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* Example implemented from here https://www.tutorialspoint.com/sqlite/sqlite_update_query.htm
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*/
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#include <sqlite_orm/sqlite_orm.h>
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#include <iostream>
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#include <memory>
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using std::cout;
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using std::endl;
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struct Employee {
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int id;
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std::string name;
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int age;
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std::string address;
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double salary;
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};
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inline auto initStorage(const std::string& path) {
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using namespace sqlite_orm;
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return make_storage(path,
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make_table("COMPANY",
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make_column("ID", &Employee::id, primary_key()),
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make_column("NAME", &Employee::name),
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make_column("AGE", &Employee::age),
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make_column("ADDRESS", &Employee::address),
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make_column("SALARY", &Employee::salary)));
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}
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using Storage = decltype(initStorage(""));
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static std::unique_ptr<Storage> stor;
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int main(int, char**) {
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stor = std::make_unique<Storage>(initStorage("update.sqlite"));
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stor->sync_schema();
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stor->remove_all<Employee>();
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// insert initial values
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stor->replace(Employee{1, "Paul", 32, "California", 20000.0});
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stor->replace(Employee{2, "Allen", 25, "Texas", 15000.0});
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stor->replace(Employee{3, "Teddy", 23, "Norway", 20000.0});
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stor->replace(Employee{4, "Mark", 25, "Rich-Mond", 65000.0});
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stor->replace(Employee{5, "David", 27, "Texas", 85000.0});
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stor->replace(Employee{6, "Kim", 22, "South-Hall", 45000.0});
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stor->replace(Employee{7, "James", 24, "Houston", 10000.0});
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// show 'COMPANY' table contents
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for(auto& employee: stor->iterate<Employee>()) {
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cout << stor->dump(employee) << endl;
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}
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cout << endl;
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// 'UPDATE COMPANY SET ADDRESS = 'Texas' WHERE ID = 6'
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auto employee6 = stor->get<Employee>(6);
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employee6.address = "Texas";
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stor->update(
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employee6); // actually this call updates all non-primary-key columns' values to passed object's fields
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// show 'COMPANY' table contents again
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for(auto& employee: stor->iterate<Employee>()) {
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cout << stor->dump(employee) << endl;
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}
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cout << endl;
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// 'UPDATE COMPANY SET ADDRESS = 'Texas', SALARY = 20000.00 WHERE AGE < 30'
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using namespace sqlite_orm;
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stor->update_all(set(c(&Employee::address) = "Texas", c(&Employee::salary) = 20000.00),
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where(c(&Employee::age) < 30));
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// show 'COMPANY' table contents one more time
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for(auto& employee: stor->iterate<Employee>()) {
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cout << stor->dump(employee) << endl;
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}
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cout << endl;
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return 0;
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}
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