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

[Anuradha Karunarathna <[e-mail]>]

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