Model.findOne()

Parameters

• [conditions] «Object»

• [projection] «Object|String|Array<String>» optional fields to return, see Query.prototype.select()

• [options] «Object» optional see Query.prototype.setOptions()

• [callback] «Function»

Returns:

• «Query»

Finds one document.

The conditions are cast to their respective SchemaTypes before the command is sent.

Note: conditions is optional, and if conditions is null or undefined, mongoose will send an empty findOne command to MongoDB, which will return an arbitrary document. If you’re querying by _id, use findById() instead.

Example:

// Find one adventure whose `country` is 'Croatia', otherwise `null`
await Adventure.findOne({ country: 'Croatia' }).exec();
// using callback
Adventure.findOne({ country: 'Croatia' }, function (err, adventure) {});
// select only the adventures name and length
await Adventure.findOne({ country: 'Croatia' }, 'name length').exec();