How to cascade delete document in mongodb?

@orpha 

In MongoDB, cascade deletes are not supported out of the box as they are in relational databases. However, you can achieve similar functionality by using database triggers or application logic.

One approach is to use embedded documents or subdocuments within your main document. When you delete the main document, all embedded documents are automatically deleted as well. You can also use a pre-delete hook or middleware to cascade delete related documents before deleting the main document.

Another option is to use a reference to related documents in your main document, and then manually delete the related documents before deleting the main document. This can be done using a pre-delete hook or middleware to automatically delete related documents when the main document is deleted.

It is important to carefully consider your data model and the relationships between your documents before implementing cascade deletes in MongoDB. Always make sure to test your implementation thoroughly to avoid unintended data loss.