JAVASCRIPT

Mongoose DELETE

// Delete a user by username
app.delete('/users/:Username', (req, res) => {
  Users.findOneAndRemove({ Username: req.params.Username })
    .then((user) => {
      if (!user) {
        res.status(400).send(req.params.Username + ' was not found');
      } else {
        res.status(200).send(req.params.Username + ' was deleted.');
      }
    })
    .catch((err) => {
      console.error(err);
      res.status(500).send('Error: ' + err);
    });
});

mongoose find by and delete

Campground.findByIdAndRemove(req.params.id, function(err){
      if(err){
          res.redirect("/campgrounds");
      } else {
          res.redirect("/campgrounds");
      }
   });

mongoose delete request

// The "todo" in this callback function represents the document that was found.
// It allows you to pass a reference back to the client in case they need a reference for some reason.
Todo.findByIdAndRemove(req.params.todoId, (err, todo) => {
    // As always, handle any potential errors:
    if (err) return res.status(500).send(err);
    // We'll create a simple object to send back with a message and the id of the document that was removed
    // You can really do this however you want, though.
    const response = {
        message: "Todo successfully deleted",
        id: todo._id
    };
    return res.status(200).send(response);
});

MONGOOSE delete

Modelname.findOneAndDelete({ id: id })

delete document mongoose

Tank.deleteOne({ size: 'large' }, function (err) {
  if (err) return handleError(err);
  // deleted at most one tank document
});

mongoose undo delete

No,
You cannot undo a delete operation.
Once deleted the data cannot be retrieved UNLESS a dump of the collections is created
before deleting it.

mongoose remove

const res = await Character.remove({ name: 'Eddard Stark' });
res.deletedCount; // Number of documents removed