No, this is different case, all examples in joining manuals describe how to access related but independent objects - there is always one object one row.

What I am looking for is how to implement the inheritance with additional attributes in DBIC.

An unsophisticated example:

-- I have an animal table describing species
create table myschema.animal (
   species varchar2(64) primary key,
   region varchar2(64)
);
-- and some tables extending the animal
create table myschema.animal_mammal (
   species varchar2(64), -- foreign key
   max_height number,
   quadrupedal number(1) default 1 -- 0 or 1
);
create table myschema.animal_bird (
   species varchar2(64), -- foreign key
   max_wingspan number,
   number_of_eggs number
);

[download]

I would like to create the DBIC classes for mammal and bird so I can work with them as single objects.

my $dog = $schema->resultset('Mammal')->find('Canis familiaris');
warn $dog->region, ' ', $dog->max_height;
my $chimp = $schema->resultset('Mammal')->create({
   'species' => 'Pan troglodytes',
   'region'  => 'Africa',
   'quadrupedal' => 0,
});

[download]

In reply to Re^2: Extension of DBIC "model" class by roman
in thread Extension of DBIC "model" class by roman

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