Description of problem:
Cannot retrieve permissions for a particular resource, meanwhile docs says it should be possible.

https://pulp-dev-guide.readthedocs.org/en/pulp-2.2/integration/rest-api/permission/retrieval.html#retrieval


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Retrieve permissions on a particular resource

Actual results:
Permissions on a specified resource not retrieved

Expected results:
Permissions on a specified resource retrieved

Additional info:

Listing permissions for all resources:
# http --verify=no https://admin:admin@pulp.example.com/pulp/api/v2/permissions/
HTTP/1.1 200 OK
Content-Length: 1121
Content-Type: application/json
Date: Tue, 22 Oct 2013 12:20:26 GMT
Server: Apache/2.4.6 (Fedora) OpenSSL/1.0.1e-fips mod_wsgi/3.4 Python/2.7.5

[
    {
        "_id": {
            "$oid": "525546d2da892d073367960f"
        }, 
        "_ns": "permissions", 
        "id": "525546d2da892d073367960f", 
        "resource": "/v2/users/admin/", 
        "users": {
            "admin": [
                "READ", 
                "UPDATE"
            ]
        }
    }, 
    {
        "_id": {
            "$oid": "525d34abda892d07336798e1"
        }, 
        "_ns": "permissions", 
        "id": "525d34abda892d07336798e1", 
        "resource": "/v2/tasks/aa0ef267-7bd3-482d-876c-2bf602b4b5f1/", 
        "users": {
            "admin": [
                null, 
                null
            ]
        }
    }, 
    {
        "_id": {
            "$oid": "525d35edda892d07336798f4"
        }, 
        "_ns": "permissions", 
        "id": "525d35edda892d07336798f4", 
        "resource": "/v2/tasks/ee25189f-1f16-41ca-b065-fd2f7b5fabac/", 
        "users": {
            "admin": [
                null, 
                null
            ]
        }
    }, 
    {
        "_id": {
            "$oid": "525546d2da892d073367960d"
        }, 
        "_ns": "permissions", 
        "id": "525546d2da892d073367960d", 
        "resource": "/v2/actions/login/", 
        "users": {
            "admin": [
                "READ", 
                "UPDATE"
            ]
        }
    }, 
    {
        "_id": {
            "$oid": "525546d2da892d073367960e"
        }, 
        "_ns": "permissions", 
        "id": "525546d2da892d073367960e", 
        "resource": "/v2/actions/logout/", 
        "users": {
            "admin": [
                "READ", 
                "UPDATE"
            ]
        }
    }, 
    {
        "_id": {
            "$oid": "525546d2da892d0733679610"
        }, 
        "_ns": "permissions", 
        "id": "525546d2da892d0733679610", 
        "resource": "/", 
        "users": {
            "admin": [
                "CREATE", 
                "READ", 
                "UPDATE", 
                "DELETE", 
                "EXECUTE"
            ]
        }
    }
]

Using the id of the resource:

# http --verify=no https://admin:admin@pulp.example.com/pulp/api/v2/permissions/525546d2da892d0733679610/
HTTP/1.1 404 Not Found
Content-Type: text/html; charset=UTF-8
Date: Tue, 22 Oct 2013 12:22:20 GMT
Server: Apache/2.4.6 (Fedora) OpenSSL/1.0.1e-fips mod_wsgi/3.4 Python/2.7.5
Transfer-Encoding: chunked

not found