The `db` Property in Mongoose

Mongoose provides numerous powerful features, like middleware and validation. But sometimes you want to bypass Mongoose and use the MongoDB Node.js driver directly. Mongoose connections have a db property that let you access the MongoDB driver's db handle:

// Connect to a MongoDB server running on 'localhost:27017' and use the
// 'test' database.
await mongoose.connect('mongodb://localhost:27017/test', {
  useNewUrlParser: true // Boilerplate for Mongoose 5.x
});

// Get the current db's profiling level using:
// http://mongodb.github.io/node-mongodb-native/3.6/api/Db.html#profilingLevel
// Mongoose doesn't support getting the profiling level.
const profilingLevel = await mongoose.connection.db.profilingLevel();
profilingLevel; // 'off'

The db property is usually enough, but there are some cases where you need the MongoClient instance instead of the db handle.

// Get another db's profiling level using:
// http://mongodb.github.io/node-mongodb-native/3.6/api/Db.html#profilingLevel
// Mongoose doesn't support getting the profiling level.
const client = mongoose.connection.getClient();
const profilingLevel = await client.db('otherdb').profilingLevel();
profilingLevel; // 'off'

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More Mongoose Tutorials

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• Using limit() with Mongoose Queries
• How to Fix "Buffering timed out after 10000ms" Error in Mongoose
• Using insertOne() in Mongoose
• Mongoose on('delete')
• Enums in Mongoose
• Mongoose find() Certain Fields