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Databases & messaging · #mongodb
Learn how Mongoose's select() projection reduces network overhead in Node.js blog APIs by returning only needed fields, with a practical example and key limitations to avoid.
Learn how Discloud’s one‑click MongoDB add‑on provisions a managed database, injects MONGODB_URI, and what limits the free tier imposes on storage, backups, and performance.
Decide between Mongoose discriminators, separate collections, and manual type fields with a comparison table, a working discriminator setup, partial unique indexes, and validation steps.
Mongoose pre/post hooks are ideal for password hashing, audit logs, and slug generation — but they silently skip insertMany and bulkWrite. A worked bcrypt example plus the limits and mistakes that matter.
Learn how to diagnose and fix latency spikes in Meteor.js by optimizing DDP publications, resolving MongoDB collection scans, and preventing event loop blockage.
MongoDB TTL indexes delete expired documents for you — no cron job required. Here's how they work, a working configuration, and the operational caveats that matter before you rely on them.
Learn how to create, test, and maintain a MongoDB TTL index that automatically removes expired documents, with step‑by‑step commands, verification, and rollback instructions.
A compound index is an ordered path, not a bag of fields. Here is how key order decides which MongoDB queries get an IXSCAN, and how to verify it with explain executionStats.
MongoDB TTL indexes delete expired sessions, tokens, and logs for you — no cron job required. Here's how they work, where they fall short, and how to verify them.
mongoose
nodejs