Deleting data

By now it will probably come as no surprise that there are a few different methods for deleting data. The methods are:

• remove(): This method deletes one or more documents from the collection

• findOneAndRemove(): This method finds a single document based on a query object and removes it, passing it to the callback function on successful completion

• findByIdAndRemove(): This method is the same as the findOneAndRemove method, except that it finds a document based on a provided document ID

The remove() method can be used in two ways: as a model method, or as an instance method. When using it as a model method, you pass it a query object and it will remove the matching documents. For example:

User.remove({ name : /Simon/ } , function (err){
  if (!err){
    // all users with 'Simon' in their name were deleted
  }
});

To use the remove() method as an instance method you operate it after a find operation once you have results returned. For example:

User.findOne({ email : 'simon@theholmesoffice...