No... don't forget that
has_many() and
has_a() are actually method calls, not declarations... so they are
executed in the order that they are in the source code. The
has_many() call comes first, and at that time, the
has_a() call hasn't happened yet.
If you were to reorder your source code so that the has_a() call comes first, then it would indeed have to work.
So, what happens now? Class::DBI makes a bad guess, it uses the "moniker" of the class name that has the has_many() call, for the field name for the remote table. In your case, that is "usr", derived from the class name "Dl::Usr".
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