X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FRelationship%2FManyToMany.pm;h=451e43501b18ba99678e0b1685f00f6c64dd9455;hb=434ffe5f4cd4d2bfb6cadb6c6100096ecdadbb60;hp=efbd770b74f506e4a92a33781d8780b35d1e951d;hpb=aeb1bf757122d5260a1d84f17f2d0beec7822165;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Relationship/ManyToMany.pm b/lib/DBIx/Class/Relationship/ManyToMany.pm
index efbd770..451e435 100644
--- a/lib/DBIx/Class/Relationship/ManyToMany.pm
+++ b/lib/DBIx/Class/Relationship/ManyToMany.pm
@@ -1,18 +1,107 @@
-package DBIx::Class::Relationship::ManyToMany;
+package # hide from PAUSE
+    DBIx::Class::Relationship::ManyToMany;
 
 use strict;
 use warnings;
 
 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) {
+      warn "***************************************************************************\n".
+           "The many-to-many relationship $meth is trying to create a utility method called $_. This will overwrite the existing method on $class. You almost certainly want to rename your method or the many-to-many relationship, as your method will not be callable (it will use the one from the relationship instead.) YOU HAVE BEEN WARNED\n".
+           "***************************************************************************\n"
+        if $class->can($_);
+    }
+
+    $rel_attrs->{alias} ||= $f_rel;
+
+    *{"${class}::${meth}_rs"} = sub {
       my $self = shift;
       my $attrs = @_ > 1 && ref $_[$#_] eq 'HASH' ? pop(@_) : {};
-      $self->search_related($rel)->search_related($f_rel, @_ > 0 ? @_ : undef, { %{$rel_attrs||{}}, %$attrs });
+      my @args = ($f_rel, @_ > 0 ? @_ : undef, { %{$rel_attrs||{}}, %$attrs });
+      my $rs = $self->search_related($rel)->search_related(
+        $f_rel, @_ > 0 ? @_ : undef, { %{$rel_attrs||{}}, %$attrs }
+      );
+	  return $rs;
+    };
+
+	*{"${class}::${meth}"} = sub {
+		my $self = shift;
+		my $rs = $self->$rs_meth( @_ );
+  		return (wantarray ? $rs->all : $rs);
+	};
+
+    *{"${class}::${add_meth}"} = sub {
+      my $self = shift;
+      @_ > 0 or $self->throw_exception(
+        "${add_meth} needs an object or hashref"
+      );
+      my $source = $self->result_source;
+      my $schema = $source->schema;
+      my $rel_source_name = $source->relationship_info($rel)->{source};
+      my $rel_source = $schema->resultset($rel_source_name)->result_source;
+      my $f_rel_source_name = $rel_source->relationship_info($f_rel)->{source};
+      my $f_rel_rs = $schema->resultset($f_rel_source_name)->search({}, $rel_attrs||{});
+
+      my $obj;
+      if (ref $_[0]) {
+        if (ref $_[0] eq 'HASH') {
+          $obj = $f_rel_rs->create($_[0]);
+        } else {
+          $obj = $_[0];
+        }
+      } else {
+        $obj = $f_rel_rs->create({@_});
+      }
+
+      my $link_vals = @_ > 1 && ref $_[$#_] eq 'HASH' ? pop(@_) : {};
+      my $link = $self->search_related($rel)->new_result($link_vals);
+      $link->set_from_related($f_rel, $obj);
+      $link->insert();
+	  return $obj;
+    };
+
+    *{"${class}::${set_meth}"} = sub {
+      my $self = shift;
+      @_ > 0 or $self->throw_exception(
+        "{$set_meth} needs a list of objects or hashrefs"
+      );
+      my @to_set = (ref($_[0]) eq 'ARRAY' ? @{ $_[0] } : @_);
+      $self->search_related($rel, {})->delete;
+      $self->$add_meth($_) for (@to_set);
     };
+
+    *{"${class}::${remove_meth}"} = sub {
+      my $self = shift;
+      @_ > 0 && ref $_[0] ne 'HASH'
+        or $self->throw_exception("${remove_meth} needs an object");
+      my $obj = shift;
+      my $rel_source = $self->search_related($rel)->result_source;
+      my $cond = $rel_source->relationship_info($f_rel)->{cond};
+      my $link_cond = $rel_source->resolve_condition(
+        $cond, $obj, $f_rel
+      );
+      $self->search_related($rel, $link_cond)->delete;
+    };
+
   }
 }