Best practice for partial updates in a RESTful service

You basically have two options:

  1. Use PATCH (but note that you have to define your own media type that specifies what will happen exactly)

  2. Use POST to a sub resource and return 303 See Other with the Location header pointing to the main resource. The intention of the 303 is to tell the client: “I have performed your POST and the effect was that some other resource was updated. See Location header for which resource that was.” POST/303 is intended for iterative additions to a resources to build up the state of some main resource and it is a perfect fit for partial updates.

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