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數(shù)據(jù)審計(jì)功能可以通過C++ ORM框架來實(shí)現(xiàn)。下面是一個(gè)簡(jiǎn)單的示例,使用C++ ORM框架cppdb來實(shí)現(xiàn)數(shù)據(jù)審計(jì)功能:
CREATE TABLE audit_log (
id INT PRIMARY KEY AUTO_INCREMENT,
table_name VARCHAR(255),
row_id INT,
field_name VARCHAR(255),
old_value VARCHAR(255),
new_value VARCHAR(255),
modified_at TIMESTAMP,
modified_by VARCHAR(255)
);
#include <cppdb/frontend.h>
#include <cppdb/driver_manager.h>
cppdb::session sql("sqlite3:dbname=test.db");
void audit_log(std::string table_name, int row_id, std::string field_name, std::string old_value, std::string new_value, std::string modified_by) {
cppdb::statement stmt = sql << "INSERT INTO audit_log (table_name, row_id, field_name, old_value, new_value, modified_at, modified_by) VALUES (?, ?, ?, ?, ?, CURRENT_TIMESTAMP, ?)";
stmt.bind(table_name);
stmt.bind(row_id);
stmt.bind(field_name);
stmt.bind(old_value);
stmt.bind(new_value);
stmt.bind(modified_by);
stmt.exec();
}
void update_data(int row_id, std::string new_value, std::string modified_by) {
// 查詢舊值
cppdb::result r = sql << "SELECT field_name, value FROM table_name WHERE id = ?" << row_id;
while (r.next()) {
std::string field_name, old_value;
r >> field_name >> old_value;
// 更新數(shù)據(jù)
sql << "UPDATE table_name SET value = ? WHERE id = ?" << new_value << row_id;
// 記錄審計(jì)日志
audit_log("table_name", row_id, field_name, old_value, new_value, modified_by);
}
}
update_data()
函數(shù)來更新數(shù)據(jù)并記錄審計(jì)日志。update_data(1, "new_value", "admin");
通過以上步驟,就可以利用C++ ORM框架cppdb實(shí)現(xiàn)數(shù)據(jù)審計(jì)功能。當(dāng)數(shù)據(jù)發(fā)生變更時(shí),會(huì)記錄修改前后的數(shù)值以及修改人等信息到審計(jì)日志表中,實(shí)現(xiàn)數(shù)據(jù)審計(jì)的功能。
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