Change record status: 
Project: 
Introduced in branch: 
8.2.x
Introduced in version: 
8.2.0
Description: 

When PATCHing an entity using REST, you would expect to get that updated entity back (particularly to be able to see computed fields, like the updated field), but Drupal 8.0.x/8.1.x's REST implementation does not do this. All you get is a HTTP 204 response with no body, to let you know the update was successful.

Consequently, in Drupal 8.0.x/8.1.x you first have to PATCH an entity and then GET it again. This is both painful and slow (2 round trips instead of one).

As of Drupal 8.2.0, Drupal's entity REST responses (\Drupal\rest\Plugin\rest\resource\EntityResource::patch()) return the updated entity.

Impacts: 
Module developers
Themers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done