Suppose I have a schema with two fields:
someDate: Date
isPriority: boolean
I want to create a sort query based on someDate, where records with isPriority: true are always prioritized first. How can this be achieved? Currently, I am able to sort by date as follows:
Record.find().sort({ someDate: -1 });
It appears that MongoDB has recently added support for sorting using key order, rather than just relying on index(es) to determine the sort.
According to MongoDB's official documentation, in order to achieve a "stable" sort, it is recommended to have a unique column as the last key in the query.
db.restaurants.find().sort( { "borough": 1, "_id": 1 } )
Therefore, for your specific query, you should use:
{isPriority: 1, someDate: -1, _id: 1}.
An incorrect approach would be:
{someDate: -1, isPriority: 1, _id: 1}
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