I doubt this will fix the error, but shouldn't your Sessions_Metadata cross reference table have two primary keys? 

__PACKAGE__->columns(Primary => qw/session_id username/);
__PACKAGE__->columns(Others => qw/create_date expire query_id/);

[download]
Hope this helps ...

UPDATE:
Ahhh ... i see the problem now. You are not setting up your Users and Sessions classes to be able to 'have many' Sessions_Metadata. Here is how you might set up Users (untested). I am not sure how your tables really relate, so you may or may not need to do something similar in Sessions. Here goes: 

__PACKAGE__->has_many(
   sessions => [EP::Common::DBI::Sessions_Metadata => 'id'] 
            => 'session_id'
);

[download]
You might need to explain more to us about how these tables relate to one another in order to find the solution.

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)

In reply to Re: Class::DBI has_a relationships by jeffa
in thread Class::DBI has_a relationships by CassJ

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