MongoDB

• Installing and Running on MacOS

MongoDB With Spring Data

• Both the @Query and @Aggregation annotations can be used to build queries, but the @Aggregation one provides access to more logic, such as limits and offsets (skip) (source, StackOverflow).
• Alternatively for pagination, a Pageable argument can be supplied.

Useful Commands

• Set a value to null (requires MongoDB >=4.2 for the aggregration pipeline)

  db.collection.findOneAndUpdate({ _id: ObjectId("foo") }, [
    { $addFields: { deletedDate: null } },
  ]);

Useful Links

• Query and Projection Operators
  • I can never remember the various operators available when writing queries; here’s the official reference.