Re: [scim] User resource's lastModified attribute behavior on Group resource update

Anuradha Karunarathna <anuradha199528@gmail.com> Mon, 07 December 2020 06:28 UTC

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From: Anuradha Karunarathna <anuradha199528@gmail.com>
Date: Mon, 7 Dec 2020 11:58:16 +0530
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To: Phillip Hunt <phil.hunt@independentid.com>
Cc: scim@ietf.org
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Subject: Re: [scim] User resource's lastModified attribute behavior on Group resource update
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Hi Phillip,

Thank you for the clarification.

On Sun, Dec 6, 2020 at 9:26 PM Phillip Hunt <phil.hunt@independentid.com>
wrote:

> I believe the spec is silent on this matter.
>
> The issue is that indirect or dynamic (eg groups attribute) memberships
> are by their nature subject to change until calculated at query time.
>
> Thus I would not necessarily count on implementations updating
> lastModified for dynamic/calculated values.
>
> Phil
>
> On Dec 5, 2020, at 11:59 PM, Anuradha Karunarathna <
> anuradha199528@gmail.com> wrote:
>
> 
> Hi all,
>
> According to the lastModified attribute definition in RFC 7643 section 3.1
> [1 <https://tools.ietf.org/html/rfc7643#section-3.1>], a particular
> resource's lastModified attribute should be updated if the resource is
> updated. According to the definition, it is obvious to have an update on a
> user's lastModified attribute based on PATCH operation on
> /Users/{user-id} or PUT operation on  /Users/{user-id}.
> Also, I feel that the lastModified attribute of user resource should be
> updated even the user updates indirectly.
>
> eg: Adding a member to a group should cause to update the relevant group
> and user resources' lastModified attribute.
>
> PATCH /Groups/acbf3ae7-8463-...-9b4da3f908ce
>    Host: example.com
>    Accept: application/scim+json
>    Content-Type: application/scim+json
>    Authorization: Bearer h480djs93hd8
>    If-Match: W/"a330bc54f0671c9"
>
>    { "schemas":
>       ["urn:ietf:params:scim:api:messages:2.0:PatchOp"],
>      "Operations":[
>        {
>         "op":"add",
>         "path":"members",
>         "value":[
>          {
>            "display": "Babs Jensen",
>            "$ref":
>    "https://example.com/v2/Users/2819c223...413861904646",
>            "value": "2819c223-7f76-453a-919d-413861904646"
>          }
>         ]
>        }
>      ]
>    }
>
>
> If we take the above request as a succeded PATCH request, lastModified attribute of
>
>    - the group identified by id acbf3ae7-8463-...-9b4da3f908ce and,
>    - the user Babs Jensen (SCIM id- 2819c223-7f76-453a-919d-413861904646)
>
> should be updated.
>
>
> I want to clarify whether my understanding is correct?
>
> [1] https://tools.ietf.org/html/rfc7643#section-3.1
>
> Thanks,
> Anuradha
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