1 package # hide from PAUSE
2 DBIx::Class::Relationship::ManyToMany;
6 use warnings::register;
10 my ($class, $meth, $rel, $f_rel, $rel_attrs) = @_;
12 $class->throw_exception(
13 "missing relation in many-to-many"
16 $class->throw_exception(
17 "missing foreign relation in many-to-many"
22 no warnings 'redefine';
24 my $add_meth = "add_to_${meth}";
25 my $remove_meth = "remove_from_${meth}";
26 my $set_meth = "set_${meth}";
27 my $rs_meth = "${meth}_rs";
29 for ($add_meth, $remove_meth, $set_meth, $rs_meth) {
30 if ( $class->can ($_) ) {
31 warnings::warnif(<<"EOW")
32 ***************************************************************************
33 The many-to-many relationship $meth is trying to create a utility method called
34 $_. This will overwrite the existing method on $class. You almost certainly
35 want to rename your method or the many-to-many relationship, as your method
36 will not be callable (it will use the one from the relationship instead.)
38 To disable this warning add the following to $class
40 no warnings 'DBIx::Class::Relationship::ManyToMany';
42 ***************************************************************************
47 $rel_attrs->{alias} ||= $f_rel;
49 my $rs_meth_name = join '::', $class, $rs_meth;
50 *$rs_meth_name = Sub::Name::subname $rs_meth_name, sub {
52 my $attrs = @_ > 1 && ref $_[$#_] eq 'HASH' ? pop(@_) : {};
53 my @args = ($f_rel, @_ > 0 ? @_ : undef, { %{$rel_attrs||{}}, %$attrs });
54 my $rs = $self->search_related($rel)->search_related(
55 $f_rel, @_ > 0 ? @_ : undef, { %{$rel_attrs||{}}, %$attrs }
60 my $meth_name = join '::', $class, $meth;
61 *$meth_name = Sub::Name::subname $meth_name, sub {
63 my $rs = $self->$rs_meth( @_ );
64 return (wantarray ? $rs->all : $rs);
67 my $add_meth_name = join '::', $class, $add_meth;
68 *$add_meth_name = Sub::Name::subname $add_meth_name, sub {
70 @_ > 0 or $self->throw_exception(
71 "${add_meth} needs an object or hashref"
73 my $source = $self->result_source;
74 my $schema = $source->schema;
75 my $rel_source_name = $source->relationship_info($rel)->{source};
76 my $rel_source = $schema->resultset($rel_source_name)->result_source;
77 my $f_rel_source_name = $rel_source->relationship_info($f_rel)->{source};
78 my $f_rel_rs = $schema->resultset($f_rel_source_name)->search({}, $rel_attrs||{});
82 if (ref $_[0] eq 'HASH') {
83 $obj = $f_rel_rs->create($_[0]);
88 $obj = $f_rel_rs->create({@_});
91 my $link_vals = @_ > 1 && ref $_[$#_] eq 'HASH' ? pop(@_) : {};
92 my $link = $self->search_related($rel)->new_result($link_vals);
93 $link->set_from_related($f_rel, $obj);
98 my $set_meth_name = join '::', $class, $set_meth;
99 *$set_meth_name = Sub::Name::subname $set_meth_name, sub {
101 @_ > 0 or $self->throw_exception(
102 "{$set_meth} needs a list of objects or hashrefs"
104 my @to_set = (ref($_[0]) eq 'ARRAY' ? @{ $_[0] } : @_);
105 $self->search_related($rel, {})->delete;
106 $self->$add_meth($_) for (@to_set);
109 my $remove_meth_name = join '::', $class, $remove_meth;
110 *$remove_meth_name = Sub::Name::subname $remove_meth_name, sub {
112 @_ > 0 && ref $_[0] ne 'HASH'
113 or $self->throw_exception("${remove_meth} needs an object");
115 my $rel_source = $self->search_related($rel)->result_source;
116 my $cond = $rel_source->relationship_info($f_rel)->{cond};
117 my $link_cond = $rel_source->resolve_condition(
120 $self->search_related($rel, $link_cond)->delete;