.fetchOrCreate()

Fetches the first entry that matches the provided filter directly from the JSON file. If no entry is found, creates and pushes a new one with the provided data into the collection.

fetchOrCreate(filter, data)

Parameter	Description
filter	Callback Function to test each element of the array. Return a value that coerces to true to keep the element, or to false otherwise
data	Data Entry's data

Returns	Description
Data	First entry that matches the filter or, if no entry is found, the newly created one

// Note: Users is a collection.

Users.create({ name: 'Richard' }); // { name: 'Richard' }

Users.fetchAll(); // [{ name: 'Richard' }]
Users.fetch(u => u.name === 'Henry'); // null

Users.fetchOrCreate(u => u.name === 'Henry', { name: 'Henry' }); // { name: 'Henry' }

Users.fetchAll(); // [{ name: 'Richard' }, { name: 'Henry' }]