findOneAndUpdateFindOneAndReplaceFindOneAndDelete

FindOneAndUpdate, FindOneAndReplace, and FindOneAndDelete are atomic operations in MongoDB that combine the functionality of finding a document and modifying it in a single command. These operations are particularly useful in scenarios where you need to ensure that the document is updated or deleted only if certain conditions are met, and you want to retrieve the document before or after the modification.

FindOneAndUpdate is used to find a document and update it in a single atomic operation. It returns the document either before or after the update, depending on the specified options. This operation is useful for scenarios where you need to update a document and immediately retrieve the updated document.

FindOneAndReplace is similar to FindOneAndUpdate but replaces the entire document with a new one. It also returns the document before or after the replacement, based on the specified options. This operation is useful when you need to replace an entire document and retrieve the document before or after the replacement.

FindOneAndDelete is used to find a document and delete it in a single atomic operation. It returns the deleted document. This operation is useful for scenarios where you need to delete a document and immediately retrieve the deleted document.

These operations are atomic, meaning they are executed as a single, indivisible operation. This ensures that the document is not modified or deleted by another operation between the find and the update/replace/delete operation. This is particularly important in multi-threaded or distributed systems where multiple operations may be performed on the same document simultaneously.