Increment a Counter Field Atomically

MongoDB

Technical Specification

Increment a product's views count by 1 every time it is viewed.

Input/Output Samples

Input:view product

Output:views: previous+1

Optimal Logic Path

db.products.updateOne(
  { _id: ObjectId("...") },
  { $inc: { views: 1 } }
);

Architectural Deep-Dive

$inc performs atomic increments which is safe for concurrent updates.