Milline on erinevus POST meetodi ja idempotentsete meetodite vahel REST API arendamisel?

The POST method in REST API is used for creating resources and is not idempotent, meaning that repeated calls to POST can result in multiple resources being created or changes to the server state.

Idempotent methods, such as GET, PUT, DELETE, when called repeatedly with the same parameters, do not change the server state after the first request. For example, repeated PUT with the same data will update the resource once and will not cause additional changes.

Main difference:

• POST: not idempotent, used for creating or performing operations that can change the server state multiple times.
• Idempotent methods: guarantee that repeated requests with the same parameters will not further change the server state.

This is important for error handling and repeated requests to prevent data duplication or unwanted changes.