I couldn't understand from the manual how to use 'inflate'

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I want, for example, the "homepage" (which is non-existant in the main 
database) method of Music::Artist to do a search in some other, remote 
database and return me the result.
Also when storing to the "homepage" field by writing 
$artist->homepage($url), I would like Class::DBI to store $url in that 
other, remote database.

I looked in the manual but got no information from it that could lead me.

Should my program look something like this?

====================
package Music::Artist;
use base [...]
__PACKAGE__->has_a(homepage => 'Object::Name',
    inflate => sub { return Remote::Table->search( artist => shift 
)->first->homepage }
    deflate => sub { Remote::Table->search ( artist => shift 
)->first->homepage(shift) }
====================

What I wrote above is quite different than the Time::Piece example given 
in the Class::DBI manual, because:
1) The Class::DBI documentation example implies that the "homepage" 
field exists in the local database (whereas in my case it doesn't)
2) "shift" inside the subs I define would return the value inside the 
"homepage" field of the local Artists table (whereas in my case I want 
it to return the value inside the primary key of the current record of 
the local Artists table)

How do you think I should go about doing this?

Thank you,
- karjala