<%doc>
=pod

=head1 NAME

update

=head1 SYNOPSIS

  <& update, table => $table, %ARGS &>

=head1 DESCRIPTION

A simple widget to perform an update based on the values of %ARGS.

=head1 PARAMETERS

=over 4

=item * table

An <Alzabo::Table> object which contains the row to be updated

=back

The rest of the arguments should simply be the C<%ARGS> hash as passed
to the calling component.  This component will extract the relevant
column values from that hash.

=head1 RETURNS

The row just updated is returned from this component.

=cut
</%doc>
<%args>
$table
</%args>
<%init>
my %data;
my %pk;
foreach my $c ( $table->primary_key )
{
    $pk{ $c->name } = $ARGS{ $c->name };
}

foreach my $c ( $table->columns )
{
    $data{ $c->name } = $ARGS{ $c->name }
	if exists $ARGS{ $c->name };
}

my $row = $table->row_by_primary_key( pk => \%pk );
$row->update(%data);

return $row;
</%init>