-package DBIx::Class::Relationship::ManyToMany;
+package # hide from PAUSE
+ DBIx::Class::Relationship::ManyToMany;
use strict;
use warnings;
+use DBIx::Class::Carp;
+use Sub::Name 'subname';
+use Scalar::Util 'blessed';
+use DBIx::Class::_Util 'fail_on_internal_wantarray';
+use namespace::clean;
+
+our %_pod_inherit_config =
+ (
+ class_map => { 'DBIx::Class::Relationship::ManyToMany' => 'DBIx::Class::Relationship' }
+ );
+
sub many_to_many {
my ($class, $meth, $rel, $f_rel, $rel_attrs) = @_;
+
+ $class->throw_exception(
+ "missing relation in many-to-many"
+ ) unless $rel;
+
+ $class->throw_exception(
+ "missing foreign relation in many-to-many"
+ ) unless $f_rel;
+
{
no strict 'refs';
no warnings 'redefine';
- *{"${class}::${meth}"} = sub {
+
+ my $add_meth = "add_to_${meth}";
+ my $remove_meth = "remove_from_${meth}";
+ my $set_meth = "set_${meth}";
+ my $rs_meth = "${meth}_rs";
+
+ for ($add_meth, $remove_meth, $set_meth, $rs_meth) {
+ if ( $class->can ($_) ) {
+ carp (<<"EOW") unless $ENV{DBIC_OVERWRITE_HELPER_METHODS_OK};
+
+***************************************************************************
+The many-to-many relationship '$meth' is trying to create a utility method
+called $_.
+This will completely overwrite one such already existing method on class
+$class.
+
+You almost certainly want to rename your method or the many-to-many
+relationship, as the functionality of the original method will not be
+accessible anymore.
+
+To disable this warning set to a true value the environment variable
+DBIC_OVERWRITE_HELPER_METHODS_OK
+
+***************************************************************************
+EOW
+ }
+ }
+
+ $rel_attrs->{alias} ||= $f_rel;
+
+
+ my $rs_meth_name = join '::', $class, $rs_meth;
+ *$rs_meth_name = subname $rs_meth_name, sub {
+
+ # this little horror is there replicating a deprecation from
+ # within search_rs() itself
+ shift->search_related_rs($rel)
+ ->search_related_rs(
+ $f_rel,
+ undef,
+ ( @_ > 1 and ref $_[-1] eq 'HASH' )
+ ? { %$rel_attrs, %{ pop @_ } }
+ : $rel_attrs
+ )->search_rs(@_)
+ ;
+
+ };
+
+
+ my $meth_name = join '::', $class, $meth;
+ *$meth_name = subname $meth_name, sub {
+
+ DBIx::Class::_ENV_::ASSERT_NO_INTERNAL_WANTARRAY and my $sog = fail_on_internal_wantarray;
+
+ my $rs = shift->$rs_meth( @_ );
+
+ wantarray ? $rs->all : $rs;
+
+ };
+
+
+ my $add_meth_name = join '::', $class, $add_meth;
+ *$add_meth_name = subname $add_meth_name, sub {
+
+ ( @_ >= 2 and @_ <= 3 ) or $_[0]->throw_exception(
+ "'$add_meth' expects an object or hashref to link to, and an optional hashref of link data"
+ );
+
+ $_[0]->throw_exception(
+ "The optional link data supplied to '$add_meth' is not a hashref (it was previously ignored)"
+ ) if $_[2] and ref $_[2] ne 'HASH';
+
+ my( $self, $far_obj ) = @_;
+
+ my $guard;
+
+ # the API needs is always expected to return the far object, possibly
+ # creating it in the process
+ if( not defined blessed $far_obj ) {
+
+ $guard = $self->result_source->schema->storage->txn_scope_guard;
+
+ # reify the hash into an actual object
+ $far_obj = $self->result_source
+ ->related_source( $rel )
+ ->related_source( $f_rel )
+ ->resultset
+ ->search_rs( undef, $rel_attrs )
+ ->find_or_create( $far_obj );
+ }
+
+ my $link = $self->new_related(
+ $rel,
+ $_[2] || {},
+ );
+
+ $link->set_from_related( $f_rel, $far_obj );
+
+ $link->insert();
+
+ $guard->commit if $guard;
+
+ $far_obj;
+ };
+
+
+ my $set_meth_name = join '::', $class, $set_meth;
+ *$set_meth_name = subname $set_meth_name, sub {
+
my $self = shift;
- my $attrs = @_ > 1 && ref $_[$#_] eq 'HASH' ? pop(@_) : {};
- $self->search_related($rel)->search_related($f_rel, @_ > 0 ? @_ : undef, { %{$rel_attrs||{}}, %$attrs });
+
+ my $set_to = ( ref $_[0] eq 'ARRAY' )
+ ? ( shift @_ )
+ : do {
+ carp_unique(
+ "Calling '$set_meth' with a list of items to link to is deprecated, use an arrayref instead"
+ );
+
+ # gobble up everything from @_ into a new arrayref
+ [ splice @_ ]
+ }
+ ;
+
+ # make sure folks are not invoking a bizarre mix of deprecated and curent syntax
+ $self->throw_exception(
+ "'$set_meth' expects an arrayref of objects or hashrefs to link to, and an optional hashref of link data"
+ ) if (
+ @_ > 1
+ or
+ ( @_ and ref $_[0] ne 'HASH' )
+ );
+
+ my $guard;
+
+ # there will only be a single delete() op, unless we have what to set to
+ $guard = $self->result_source->schema->storage->txn_scope_guard
+ if @$set_to;
+
+ # if there is a where clause in the attributes, ensure we only delete
+ # rows that are within the where restriction
+ $self->search_related(
+ $rel,
+ ( $rel_attrs->{where}
+ ? ( $rel_attrs->{where}, { join => $f_rel } )
+ : ()
+ )
+ )->delete;
+
+ # add in the set rel objects
+ $self->$add_meth(
+ $_,
+ @_, # at this point @_ is either empty or contains a lone link-data hash
+ ) for @$set_to;
+
+ $guard->commit if $guard;
};
+
+
+ my $remove_meth_name = join '::', $class, $remove_meth;
+ *$remove_meth_name = subname $remove_meth_name, sub {
+
+ $_[0]->throw_exception("'$remove_meth' expects an object")
+ unless defined blessed $_[1];
+
+ $_[0]->search_related_rs( $rel )
+ ->search_rs( $_[1]->ident_condition( $f_rel ), { join => $f_rel } )
+ ->delete;
+ };
+
}
}
projects / dbsrgits/DBIx-Class.git / blobdiff