> I've got a set of documents where I'm storing access control information
> in an array on each document. This access control information contains a
> "Group" and a "Right". I don't seem to be able to query based on both
> elements at once, as in, where a certain group has a certain right.  Here
> is example data:

> {
>   "Name": "Doc1",
>   "Acl" : [ {"Group":"Users", "Right":"Read" } ]
> },
> {
>   "Name": "Doc2",
>   "Acl" : [ {"Group":"Users", "Right":"Read" }, { "Group" : "Admins",
> "Right": "Read" }, { "Group" : "Admins", "Right": "Delete" }]
> },
> {
>   "Name": "Doc3",
>   "Acl" : [ {"Group":"Admins", "Right":"Read" } ]
> },
> {
>   "Name": "Doc4",
>   "Acl" : [ {"Group":"Users", "Right":"Delete" } ]
> }

> I'd like to find the documents where members of the group "Users" have the
> right to "Delete". However, if I query like this:

> db.docs.find({"Acl.Group":"Users", "Acl.Right":"Delete"})

> then I get Doc2 and Doc4 because it matches on Acl.Group == "Users" OR
> Acl.Right == "Delete".  Is there some way to find docs with an Acl array
> element where Group = "Users" AND Right == "Delete"?  Is it possible
> without JavaScript?  I'm running 2.2, if that helps.

> Thanks.