use strict;
use warnings;
-use Tie::IxHash;
use base qw/DBIx::Class::Row/;
-__PACKAGE__->mk_classdata('_primaries' => {});
-
-=head1 NAME
+=head1 NAME
DBIx::Class::PK - Primary Key class
=head1 DESCRIPTION
-This class contains methods for handling primary keys and methods
+This class contains methods for handling primary keys and methods
depending on them.
=head1 METHODS
=cut
-sub _ident_cond {
- my ($class) = @_;
- return join(" AND ", map { "$_ = ?" } keys %{$class->_primaries});
-}
-
sub _ident_values {
my ($self) = @_;
- return (map { $self->{_column_data}{$_} } keys %{$self->_primaries});
-}
-
-=head2 set_primary_key(@cols)
-
-Defines one or more columns as primary key for this class. Should be
-called after C<columns>.
-
-=cut
-
-sub set_primary_key {
- my ($class, @cols) = @_;
- # check if primary key columns are valid columns
- for (@cols) {
- $class->throw( "Column $_ can't be used as primary key because it isn't defined in $class" )
- unless $class->has_column($_);
- }
- my %pri;
- tie %pri, 'Tie::IxHash', map { $_ => {} } @cols;
- $class->_primaries(\%pri);
-}
-
-=head2 find(@colvalues), find(\%cols)
-
-Finds a row based on its primary key(s).
-
-=cut
-
-sub find {
- my ($class, @vals) = @_;
- my $attrs = (@vals > 1 && ref $vals[$#vals] eq 'HASH' ? pop(@vals) : {});
- my @pk = keys %{$class->_primaries};
- $class->throw( "Can't find unless primary columns are defined" )
- unless @pk;
- my $query;
- if (ref $vals[0] eq 'HASH') {
- $query = $vals[0];
- } elsif (@pk == @vals) {
- $query = {};
- @{$query}{@pk} = @vals;
- #my $ret = ($class->search_literal($class->_ident_cond, @vals, $attrs))[0];
- #warn "$class: ".join(', ', %{$ret->{_column_data}});
- #return $ret;
- } else {
- $query = {@vals};
- }
- $class->throw( "Can't find unless all primary keys are specified" )
- unless (keys %$query >= @pk); # If we check 'em we run afoul of uc/lc
- # column names etc. Not sure what to do yet
- return $class->search($query)->next;
- #my @cols = $class->_select_columns;
- #my @row = $class->storage->select_single($class->_table_name, \@cols, $query);
- #return (@row ? $class->_row_to_object(\@cols, \@row) : ());
+ return (map { $self->{_column_data}{$_} } $self->primary_columns);
}
=head2 discard_changes
Re-selects the row from the database, losing any changes that had
been made.
+This method can also be used to refresh from storage, retrieving any
+changes made since the row was last read from storage.
+
=cut
sub discard_changes {
my ($self) = @_;
delete $self->{_dirty_columns};
return unless $self->in_storage; # Don't reload if we aren't real!
- my ($reload) = $self->find($self->id);
- unless ($reload) { # If we got deleted in the mean-time
+
+ if( my $current_storage = $self->get_current_storage) {
+
+ # Set $self to the current.
+ %$self = %$current_storage;
+
+ # Avoid a possible infinite loop with
+ # sub DESTROY { $_[0]->discard_changes }
+ bless $current_storage, 'Do::Not::Exist';
+
+ return $self;
+ } else {
$self->in_storage(0);
- return $self;
+ return $self;
}
- delete @{$self}{keys %$self};
- @{$self}{keys %$reload} = values %$reload;
- return $self;
}
=head2 id
sub id {
my ($self) = @_;
- $self->throw( "Can't call id() as a class method" ) unless ref $self;
+ $self->throw_exception( "Can't call id() as a class method" )
+ unless ref $self;
my @pk = $self->_ident_values;
return (wantarray ? @pk : $pk[0]);
}
-=head2 primary_columns
-
-Read-only accessor which returns the list of primary keys for a class
-(in scalar context, only returns the first primary key).
-
-=cut
-
-sub primary_columns {
- return keys %{shift->_primaries};
-}
-
=head2 ID
Returns a unique id string identifying a row object by primary key.
-Used by L<DBIx::Class::CDBICompat::LiveObjectIndex> and
+Used by L<DBIx::Class::CDBICompat::LiveObjectIndex> and
L<DBIx::Class::ObjectCache>.
=cut
sub ID {
my ($self) = @_;
- $self->throw( "Can't call ID() as a class method" ) unless ref $self;
+ $self->throw_exception( "Can't call ID() as a class method" )
+ unless ref $self;
return undef unless $self->in_storage;
- return $self->_create_ID(map { $_ => $self->{_column_data}{$_} } keys %{$self->_primaries});
+ return $self->_create_ID(map { $_ => $self->{_column_data}{$_} }
+ $self->primary_columns);
}
sub _create_ID {
- my ($class,%vals) = @_;
+ my ($self,%vals) = @_;
return undef unless 0 == grep { !defined } values %vals;
- $class = ref $class || $class;
- return join '|', $class, map { $_ . '=' . $vals{$_} } sort keys %vals;
+ return join '|', ref $self || $self, $self->result_source->name,
+ map { $_ . '=' . $vals{$_} } sort keys %vals;
}
+=head2 ident_condition
+
+ my $cond = $result_source->ident_condition();
+
+ my $cond = $result_source->ident_condition('alias');
+
+Produces a condition hash to locate a row based on the primary key(s).
+
+=cut
+
sub ident_condition {
- my ($self) = @_;
+ my ($self, $alias) = @_;
my %cond;
- $cond{$_} = $self->get_column($_) for $self->primary_columns;
+ my $prefix = defined $alias ? $alias.'.' : '';
+ $cond{$prefix.$_} = $self->get_column($_) for $self->primary_columns;
return \%cond;
}
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