const diff, patch = require('jsondiffpatch'); const saveDeltaMemento = async (docId, newState, userId) => { // 1. Fetch the LAST memento const last = await pool.query( SELECT snapshot FROM document_history WHERE document_id = $1 ORDER BY version DESC LIMIT 1 , [docId] );
console.log( 🕰️ Restored to version $memento.version from $memento.created_at ); return restoredState; ; memento database tutorial hot
In the fast-paced world of software development, data is king. But what happens when a user accidentally deletes a critical row? What if a bug corrupts an entire table during a migration? For decades, we relied on bulky backups, painful ROLLBACK statements, or complex Change Data Capture (CDC) pipelines. What if a bug corrupts an entire table during a migration
const restoreStateAtTime = async (docId, targetTimestamp) => // Find the snapshot that was active JUST BEFORE the target timestamp const query = ` SELECT snapshot, version, created_at FROM document_history WHERE document_id = $1 AND created_at <= $2 ORDER BY created_at DESC LIMIT 1 `; const result = await pool.query(query, [docId, targetTimestamp]); However, building your own gives you control that
The hottest skill in backend development right now isn't learning a new database—it's making your existing database remember.
However, building your own gives you control that no vendor lock-in can offer.