Addition of a bunch of helper relationship methods

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / Relationship.pm

diff --git a/lib/DBIx/Class/Relationship.pm b/lib/DBIx/Class/Relationship.pm
index 3fef7a3..d7d1675 100644 (file)
--- a/lib/DBIx/Class/Relationship.pm
+++ b/lib/DBIx/Class/Relationship.pm
@@ -3,101 +3,49 @@ package DBIx::Class::Relationship;
 use strict;
 use warnings;
 
-use base qw/Class::Data::Inheritable/;
+use base qw/DBIx::Class Class::Data::Inheritable/;
+
+__PACKAGE__->load_own_components(qw/
+  HasMany
+  HasOne
+  BelongsTo
+  Accessor
+  CascadeActions
+  ProxyMethods
+  Base
+/);
 
 __PACKAGE__->mk_classdata('_relationships', { } );
 
-sub add_relationship {
-  my ($class, $rel, $f_class, $cond, $attrs) = @_;
-  my %rels = %{ $class->_relationships };
-  $rels{$rel} = { class => $f_class,
-                  cond  => $cond,
-                  attrs => $attrs };
-  $class->_relationships(\%rels);
-}
-
-sub _cond_key {
-  my ($self, $attrs, $key) = @_;
-  my $action = $attrs->{_action} || '';
-  if ($action eq 'convert') {
-    unless ($key =~ s/^foreign\.//) {
-      die "Unable to convert relationship to WHERE clause: invalid key ${key}";
-    }
-    return $key;
-  } elsif ($action eq 'join') {
-    my ($type, $field) = split(/\./, $key);
-    if ($attrs->{_aliases}{$type}) {
-      return join('.', $attrs->{_aliases}{$type}, $field);
-    } else {
-      die "Unable to resolve type ${type}: only have aliases for ".
-            join(', ', keys %{$attrs->{_aliases}{$type} || {}});
-    }
-  }
-  return $self->NEXT::ACTUAL::_cond_key($attrs, $key);
-}
-
-sub _cond_value {
-  my ($self, $attrs, $key, $value) = @_;
-  my $action = $attrs->{_action} || '';
-  if ($action eq 'convert') {
-    unless ($value =~ s/^self\.//) {
-      die "Unable to convert relationship to WHERE clause: invalid value ${value}";
-    }
-    unless ($self->can($value)) {
-      die "Unable to convert relationship to WHERE clause: no such accessor ${value}";
-    }
-    push(@{$attrs->{bind}}, $self->get_column($value));
-    return '?';
-  } elsif ($action eq 'join') {
-    my ($type, $field) = split(/\./, $value);
-    if ($attrs->{_aliases}{$type}) {
-      return join('.', $attrs->{_aliases}{$type}, $field);
-    } else {
-      die "Unable to resolve type ${type}: only have aliases for ".
-            join(', ', keys %{$attrs->{_aliases}{$type} || {}});
-    }
-  }
-      
-  return $self->NEXT::ACTUAL::_cond_value($attrs, $key, $value)
-}
-
-sub search_related {
-  my $self = shift;
-  my $rel = shift;
-  my $attrs = { };
-  if (@_ > 1 && ref $_[$#_] eq 'HASH') {
-    $attrs = { %{ pop(@_) } };
-  }
-  my $rel_obj = $self->_relationships->{$rel};
-  die "No such relationship ${rel}" unless $rel;
-  $attrs = { %{$rel_obj->{attrs}}, %{$attrs || {}} };
-  my $s_cond;
-  if (@_) {
-    die "Invalid query: @_" if (@_ > 1 && (@_ % 2 == 1));
-    my $query = ((@_ > 1) ? {@_} : shift);
-    $s_cond = $self->_cond_resolve($query, $attrs);
-  }
-  $attrs->{_action} = 'convert';
-  my ($cond) = $self->_cond_resolve($rel_obj->{cond}, $attrs);
-  $cond = "${s_cond} AND ${cond}" if $s_cond;
-  return $rel_obj->{class}->retrieve_from_sql($cond, @{$attrs->{bind} || {}});
-}
-
-sub create_related {
-  my ($self, $rel, $values, $attrs) = @_;
-  die "Can't call create_related as class method" unless ref $self;
-  die "create_related needs a hash" unless (ref $values eq 'HASH');
-  my $rel_obj = $self->_relationships->{$rel};
-  die "No such relationship ${rel}" unless $rel;
-  die "Can't abstract implicit create for ${rel}, condition not a hash"
-    unless ref $rel_obj->{cond} eq 'HASH';
-  $attrs = { %{$rel_obj->{attrs}}, %{$attrs || {}}, _action => 'convert' };
-  my %fields = %$values;
-  while (my ($k, $v) = each %{$rel_obj->{cond}}) {
-    $self->_cond_value($attrs, $k => $v);
-    $fields{$self->_cond_key($attrs, $k)} = (@{delete $attrs->{bind}})[0];
-  }
-  return $rel_obj->{class}->create(\%fields);
-}
+=head1 NAME 
+
+DBIx::Class::Relationship - Inter-table relationships
+
+=head1 SYNOPSIS
+
+=head1 DESCRIPTION
+
+This class handles relationships between the tables in your database
+model. It allows your to set up relationships, and to perform joins
+on searches.
+
+=head1 METHODS
+
+=over 4
+
+=cut
 
 1;
+
+=back
+
+=head1 AUTHORS
+
+Matt S. Trout <mst@shadowcatsystems.co.uk>
+
+=head1 LICENSE
+
+You may distribute this code under the same terms as Perl itself.
+
+=cut
+