[bug] Value conversion does not work properly in API platform

[ivicac]

For example, when having http://localhost:9555/api/o/v1/test/12?name=fff1 with the body {"prop1": "prop 1"} where value 12 is a number also passed as part of the response, then the returned response looks like

{ "id": "12", "prop1": "prop 1", "name": "fff1" }

where 12 is a string instead of the number