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Fixed potential bug by improving code.

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collapsing your logic into a single atomic “upsert” statement:
This commit is contained in:
git 2025-06-25 12:53:42 +01:00
parent 5a2e11655c
commit 65496fcae0
1 changed files with 13 additions and 15 deletions
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28
main.js
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@ -22,27 +22,25 @@ function getDbPassword() {
}
// Insert data into MariaDB
async function updateMariaDB(record) {
if (!['A', 'PTR', 'SRV', 'TXT'].includes(record.Type)) return;
if (!['A','PTR','SRV','TXT'].includes(record.Type)) return;
const host = DB_USER;
const { Type, Name } = record;
const dataStr = typeof record.Data === 'object' ? JSON.stringify(record.Data) : record.Data;
const dataStr = typeof record.Data === 'object'
? JSON.stringify(record.Data)
: record.Data;
try {
// Step 1: Check if a row exists
const [rows] = await dbPool.execute(`SELECT Data FROM ${DB_TABLE} WHERE Host = ? AND Type = ? AND Name = ?;`,[host, Type, Name]);
if (rows.length === 0) {
// No existing row → INSERT
await dbPool.execute(`INSERT INTO ${DB_TABLE} (Host, Type, Name, Data) VALUES (?, ?, ?, ?);`,[host, Type, Name, dataStr]);
} else if (rows[0].Data !== dataStr) {
// Row exists but Data is different → UPDATE
await dbPool.execute(`UPDATE ${DB_TABLE} SET Data = ? WHERE Host = ? AND Type = ? AND Name = ?;`,[dataStr, host, Type, Name]);
}
// else: existing data is the same → do nothing
// INSERT new row, or if (Host,Type,Name) already exists, just update Data
const sql = `
INSERT INTO ${DB_TABLE} (Host, Type, Name, Data)
VALUES (?, ?, ?, ?)
ON DUPLICATE KEY UPDATE
Data = VALUES(Data)
`;
await dbPool.execute(sql, [host, Type, Name, dataStr]);
} catch (err) {
console.error("DB Update Error:", err);
console.error("DB Upsert Error:", err);
}
}