lib/DBIx/Class/IntrospectableM2M.pm


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

package DBIx::Class::IntrospectableM2M;

use strict;
use warnings;
use base 'DBIx::Class';

#namespace pollution. sadface.
__PACKAGE__->mk_classdata( _m2m_metadata => {} );

sub many_to_many {
  my $class = shift;
  my ($meth_name, $link, $far_side) = @_;
  my $store = $class->_m2m_metadata;
  die("You are overwritting another relationship's metadata")
    if exists $store->{$meth_name};

  my $attrs =
    {
     accessor => $meth_name,
     relation => $link, #"link" table or imediate relation
     foreign_relation => $far_side, #'far' table or foreign relation
     (@_ > 3 ? (attrs => $_[3]) : ()), #only store if exist
     rs_method => "${meth_name}_rs",      #for completeness..
     add_method => "add_to_${meth_name}",
     set_method => "set_${meth_name}",
     remove_method => "remove_from_${meth_name}",
    };

  #inheritable data workaround/
  $class->_m2m_metadata({ $meth_name => $attrs, %$store});

  $class->next::method(@_);
}

1;