What are unique constraints in Mongoose?

What are unique constraints in Mongoose?

Unique constraints in Mongoose ensure that a field's value is unique across all documents in a collection.

How do I implement a unique constraint in my Mongoose schema?

You can implement it by setting the unique property to true in your schema definition, like this: email: { type: String, unique: true }.

What happens if I try to insert a duplicate value?

If you try to insert a duplicate value, Mongoose will throw a validation error, preventing the operation.

Can I have multiple unique constraints in one schema?

Yes, you can have multiple unique constraints in a schema by setting the unique property on different fields.