Inconstency with +find+

[nfo]

> MyDocument.find(nil)
[
   [0] <MyDocument: created_at=2010-08-18 20:13:31 +0200 updated_at=nil body=nil>
]
> MyDocument.find("")
<MyDocument: created_at=2010-08-18 20:13:33 +0200 updated_at=nil body=nil>
> MyDocument.find
nil

[nfo]

I would expect nothing more than nil in all cases.

[seancribbs]

Yes, or an ArgumentError.

[nfo]

ArgumentError if no arguments are given. Otherwise, only find! should return an exception ?

[seancribbs]

I think it's reasonable that a bad key (nil or ""), or an empty argument list should raise an ArgumentError. The question is, in what situations should we silently ignore them, if at all?