mongodb
MongoDB unknown query operator
MongoError.*\$.*unknown operator|bad query.*operator
Fixes
- 1.Check operator spelling ($gt, $gte, $in, $regex, etc.)
- 2.Ensure filter objects aren't accidentally nested: {field: {$gt: 5}} not {field: {gt: 5}}
- 3.Verify you're not passing a Mongoose query object where a plain filter is expected
mongodbqueryoperators
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')