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Retrieving the response body as a List of POJOs fails with RestClient but passes with WebTestClient #31574

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donalmurtagh opened this issue Nov 8, 2023 · 2 comments
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Retrieving the response body as a List of POJOs fails with RestClient but passes with WebTestClient #31574

donalmurtagh opened this issue Nov 8, 2023 · 2 comments
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@sdeleuze
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in: web Issues in web modules (web, webmvc, webflux, websocket) type: bug A general bug
Milestone
6.1.0

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@donalmurtagh
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donalmurtagh commented Nov 8, 2023 •
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Affects: spring 6.1.0-RC2 with spring boot 3.2.0-RC2 and JDK21

Description
I've attached a sample Spring Boot application with a single endpoint that returns the response as a wrapped List<Label>. When I retrieve the response with WebTestClient the list (correctly) contains Label instances, but when I retrieve the response with RestClient the list contains Map instances.

In both cases, I've used the same ParameterizedTypeReference when retrieving the response

Steps to Reproduce
demo.zip

The application contains 2 integration tests, one of which invokes the endpoint with a RestClient and the other uses WebTestClient. The latter test passes, but the former fails.
@spring-projects-issues spring-projects-issues added the status: waiting-for-triage An issue we've not yet triaged or decided on label Nov 8, 2023
@donalmurtagh donalmurtagh changed the title Retrieving the response as a List of POJOs fails with RestClient but passes with WebTestClient Retrieving the response body as a List of POJOs fails with RestClient but passes with WebTestClient Nov 8, 2023
@sdeleuze sdeleuze self-assigned this Nov 9, 2023
@sdeleuze sdeleuze added type: bug A general bug in: web Issues in web modules (web, webmvc, webflux, websocket) and removed status: waiting-for-triage An issue we've not yet triaged or decided on labels Nov 9, 2023
@sdeleuze sdeleuze added this to the 6.1.0 milestone Nov 9, 2023
@sdeleuze
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sdeleuze commented Nov 9, 2023

Likely caused by the fact contextClass should be null for client side use case (it is currently set to bodyClass).

@donalmurtagh
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@sdeleuze thanks for the fix. I've confirmed that this is resolved in the latest 6.1.0-SNAPSHOT

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@sdeleuze sdeleuze

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in: web Issues in web modules (web, webmvc, webflux, websocket) type: bug A general bug
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6.1.0
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@sdeleuze @donalmurtagh @spring-projects-issues