mongo-clean

const clean = require('mongo-clean'); const { MongoClient } = require('mongodb'); const url = "mongodb://localhost:27017"; const dbName = 'mongocleantest'; async function run() { let client; try { // Connect to MongoDB using recommended options for modern driver client = await MongoClient.connect(url, { useNewUrlParser: true, useUnifiedTopology: true }); const db = client.db(dbName); // Optional: insert some dummy data to demonstrate cleaning await db.collection('users').insertOne({ name: 'Alice' }); await db.collection('products').insertOne({ item: 'Laptop' }); console.log('Database populated with dummy data (users, products).'); // Clean the database by dropping collections, excluding 'products' // This will remove the 'users' collection and its data, but 'products' will remain intact. await clean(db, { exclude: ['products'] }); console.log('Database cleaned (dropping collections, excluding products).'); let usersCount = await db.collection('users').countDocuments(); let productsCount = await db.collection('products').countDocuments(); console.log(`Users collection count: ${usersCount}`); // Should be 0 (collection dropped) console.log(`Products collection count: ${productsCount}`); // Should be 1 (original item still exists in retained collection) // Re-populate a collection for the next step demonstration await db.collection('temp_data').insertOne({ value: 123 }); console.log('Database re-populated with temporary data for "remove" action.'); // Clean the database by removing documents from all collections // This will empty all collections including 'products' and 'temp_data' (unless explicitly excluded). await clean(db, { action: 'remove' }); console.log('Database cleaned by removing documents from all collections.'); usersCount = await db.collection('users').countDocuments(); // 'users' collection might be recreated if accessed, but will be empty productsCount = await db.collection('products').countDocuments(); const tempDataCount = await db.collection('temp_data').countDocuments(); console.log(`Users collection count after 'remove': ${usersCount}`); // Should be 0 console.log(`Products collection count after 'remove': ${productsCount}`); // Should be 0 console.log(`Temp Data collection count after 'remove': ${tempDataCount}`); // Should be 0 } catch (err) { console.error('An error occurred:', err); } finally { if (client) { await client.close(); console.log('MongoDB connection closed.'); } } } run();