[OASIS Issue Tracker] (ODATA-585) Status response message as carrier for annotations as alternative to 204 No Content

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

    [ https://tools.oasis-open.org/issues/browse/ODATA-585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=37597#comment-37597 ] 

Michael Pizzo commented on ODATA-585:
-------------------------------------

I would think this would be really confusing to the client to get back a different resource than the one requested.

Why wouldn't we instead define a header (or headers) to convey this information, rather than defining new semantics for http status codes?

> Status response message as carrier for annotations as alternative to 204 No Content
> -----------------------------------------------------------------------------------
>
>                 Key: ODATA-585
>                 URL: https://tools.oasis-open.org/issues/browse/ODATA-585
>             Project: OASIS Open Data Protocol (OData) TC
>          Issue Type: Improvement
>          Components: OData Protocol 
>    Affects Versions: V4.0_COS
>         Environment: [Proposed]
>            Reporter: Ralf Handl
>             Fix For: V4.1_WD01
>
>
> There are some situations where OData 4.0 requires a response with 204 No Content:
>   1. GET a raw primitive value using the /$value path suffix and the value is null
>   2. GET a nullable property or navigation property and the value is null
>   3. DELETE a nullable property or relationship to set it to null
>   4. GET a function result that is primitive or structured and is null 
>   5. POST an action call and the primitive or structured result is null, or the action has no result
> This does not allow to add explanatory annotations to the logically empty result.



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