1 package DBIx::Class::ResultSource::MultipleTableInheritance;
5 use parent qw(DBIx::Class::ResultSource::View);
6 use Method::Signatures::Simple;
7 use Carp::Clan qw/^DBIx::Class/;
8 use aliased 'DBIx::Class::ResultSource::Table';
9 use namespace::autoclean;
13 # On construction, we hook $self->result_class->result_source_instance
14 # if present to get the superclass' source object
16 # When attached to a schema, we need to add sources to that schema with
17 # appropriate relationships for the foreign keys so the concrete tables
20 # We also generate our own view definition using this class' concrete table
21 # and the view for the superclass, and stored procedures for the insert,
22 # update and delete operations on this view.
24 # deploying the postgres rules through SQLT may be a pain though.
26 __PACKAGE__->mk_group_accessors(simple => qw(parent_source));
28 method new ($class: @args) {
29 my $new = $class->next::method(@args);
30 my $rc = $new->result_class;
31 if (my $meth = $rc->can('result_source_instance')) {
32 $new->parent_source($rc->$meth);
35 $new->_attach_additional_sources;
40 method _attach_additional_sources () {
41 my $raw_name = $self->_raw_source_name;
42 my $schema = $self->schema;
44 # if the raw source is already present we can assume we're done
45 return if grep { $_ eq $raw_name } $schema->sources;
46 # our parent should've been registered already actually due to DBIC
47 # attaching subclass sources later in load_namespaces
49 if ($self->parent_source) {
50 my $parent_name = $self->parent_source->name;
52 grep { $_->name eq $parent_name }
53 map $schema->source($_), $schema->sources;
54 confess "Couldn't find attached source for parent $parent_name - did you use load_classes? This module is only compatible with load_namespaces"
57 my $table = Table->new({ name => '_'.$self->name });
59 map { ($_ => { %{$self->column_info($_)} }) }
60 grep { $self->column_info($_)->{originally_defined_in} eq $self->name }
63 # we don't need to add the PK cols explicitly if we're the root table
64 # since they already got added above
67 foreach my $pri ($self->primary_columns) {
68 my %info = %{$self->column_info($pri)};
69 delete @info{qw(is_auto_increment sequence auto_nextval)};
70 $self->add_column($pri => \%info);
71 $join{"foreign.${pri}"} = "self.${pri}";
73 $self->add_relationship('parent', $parent->source_name, \%join);
75 $table->set_primary_key($self->primary_columns);
76 $schema->register_source($raw_name => $table);
79 method set_primary_key (@args) {
80 if ($self->parent_source) {
81 confess "Can't set primary key on a subclass";
83 return $self->next::method(@args);
86 method _raw_source_name () {
87 my $base = $self->source_name;
88 confess "Can't generate raw source name when we don't have a source_name"
93 method add_columns (@args) {
94 my $ret = $self->next::method(@args);
95 $_->{originally_defined_in} ||= $self->name for values %{$self->_columns};