DELETE method not working for Contents API

[fabian-st]

When attempting to delete a record using the REST API, a status "204 No Content" is returned (which indicates that the request was successful) but the record still remains unchanged.

Details

Question	Answer
Relevant Bolt Version	5.1.18
Install type	Composer install
PHP version	7.2
Web server	Apache / Built-in

Reproduction

Bug summary

* Most likely an APIPlatform implementation fault
* Annotations for deleting content using the API are present in Bolt\Entity\Content

Specifics

* API route is `/api/contents/{id}`, method is DELETE
* API definition can be found by default under `/bolt/api`
* Bolt was installed using Composer CLI
* Bolt version is 5.1.28
* Clients used to verify the problems are Postman and PHP/Curl

Steps to reproduce

* Create a User with ROLE_WEBSERVICE
* Create an example record of any content type
* Make an HTTP call with DELETE method to `/api/contents/{id}` -> should return status 204
* Verify that the record has not been deleted

Expected result

* The record is deleted from the database completely

Actual result

* The record remains unchanged