mongodb
MongoDB BSON size or type error
BSONTypeError|Cannot create.*BSON|document.*too large|16MB
Fixes
- 1.Documents cannot exceed 16MB — split large data into multiple documents or use GridFS
- 2.Check that field values are valid BSON types (no undefined, functions, or symbols)
- 3.Use projection to retrieve only needed fields from large documents
mongodbbsonsize-limit
Related Errors
mongodb3 fixes
MongoDB duplicate key violation
E11000 duplicate key error
- •Check for existing documents before insert, or use upsert
- •Verify your unique index fields don't have null values creating conflicts
mongodb3 fixes
Mongoose required field validation error
ValidationError.*Path.*is required|validation failed.*required
- •Ensure all required fields defined in schema are provided before save()
- •Check for typos in field names — Mongoose silently ignores unknown fields
mongodb3 fixes
Mongoose CastError invalid ObjectId
CastError.*Cast to ObjectId failed
- •Validate the ID format before querying: mongoose.Types.ObjectId.isValid(id)
- •Check route params aren't receiving unexpected values (e.g., 'favicon.ico')