mongodb
Mongoose optimistic concurrency version error
VersionError.*No matching document.*for.*save|document.*modified
Fixes
- 1.Re-fetch the document and reapply changes before saving again
- 2.Use findOneAndUpdate() for atomic updates instead of find-modify-save
- 3.Disable versioning with { versionKey: false } if not needed
mongodbmongooseconcurrency
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')