start to sketch out code

[dbsrgits/DBIx-Class-ResultSource-MultipleTableInheritance.git] / lib / DBIx / Class / ResultSource / MultipleTableInheritance.pm

package DBIx::Class::ResultSource::MultipleTableInheritance;

use strict;
use warnings;
use parent qw(DBIx::Class::ResultSource::View);
use namespace::autoclean;
use Method::Signatures::Simple;
use Carp::Clan qw/^DBIx::Class/;

# how this works:
#
# On construction, we hook $self->result_class->result_source_instance
# if present to get the superclass' source object
# 
# When attached to a schema, we need to add sources to that schema with
# appropriate relationships for the foreign keys so the concrete tables
# get generated
#
# We also generate our own view definition using this class' concrete table
# and the view for the superclass, and stored procedures for the insert,
# update and delete operations on this view.
#
# deploying the postgres rules through SQLT may be a pain though.

__PACKAGE__->mk_group_accessors(simple => qw(parent_source));

method new ($class: @args) {
  my $new = $class->next::method(@args);
  my $rc = $new->result_class;
  if (my $meth = $rc->can('result_source_instance')) {
    $new->parent_source($rc->$meth);
  }
  if ($new->schema) {
    $new->_attach_additional_sources;
  }
  return $new;
}

method _attach_additional_sources () {
  my $raw_name = $self->_raw_source_name;
}

method _raw_source_name () {
  my $base = $self->source_name;
  confess "Can't generate raw source name when we don't have a source_name"
    unless $base;
  return 'Raw::'.$base;
}

method add_columns (@args) {
  my $ret = $self->next::method(@args);
  $_->{originally_defined_in} ||= $self->name for values %{$self->_columns};
  return $ret;
}

1;