use strict;
use warnings;
use base 'DBIx::Class';
-use List::Util qw(first);
+use List::Util;
=head1 NAME
$new_parent_rs->{attrs}->{$_} = undef for qw(prefetch include_columns +select +as); # prefetch, include_columns, +select, +as cause additional columns to be fetched
my ($select, $as) =
map { defined $_ ? ($attrs->{select}->[$_], $attrs->{as}->[$_]) : ($column, $column) }
- first { ($attrs->{as} || [])->[$_] eq $column }
+ List::Util::first { ($attrs->{as} || [])->[$_] eq $column }
0..$#{$attrs->{as} || []};
my $new = bless { _select => $select, _as => $as, _parent_resultset => $new_parent_rs }, $class;
$new->throw_exception("column must be supplied") unless $column;
sub next {
my $self = shift;
- $self->{_resultset} = $self->{_parent_resultset}->search(undef, {select => [$self->{_select}], as => [$self->{_as}]}) unless ($self->{_resultset});
- my ($row) = $self->{_resultset}->cursor->next;
+ my ($row) = $self->_resultset->cursor->next;
return $row;
}
sub all {
my $self = shift;
- return map {$_->[0]} $self->{_parent_resultset}->search(undef, {select => [$self->{_select}], as => [$self->{_as}]})->cursor->all;
+ return map { $_->[0] } $self->_resultset->cursor->all;
+}
+
+=head2 reset
+
+=over 4
+
+=item Arguments: none
+
+=item Return Value: $self
+
+=back
+
+Resets the underlying resultset's cursor, so you can iterate through the
+elements of the column again.
+
+Much like L<DBIx::Class::ResultSet/reset>.
+
+=cut
+
+sub reset {
+ my $self = shift;
+ $self->_resultset->cursor->reset;
+ return $self;
+}
+
+=head2 first
+
+=over 4
+
+=item Arguments: none
+
+=item Return Value: $value
+
+=back
+
+Resets the underlying resultset and returns the next value of the column in the
+resultset (or C<undef> if there is none).
+
+Much like L<DBIx::Class::ResultSet/first> but just returning the one value.
+
+=cut
+
+sub first {
+ my $self = shift;
+ my ($row) = $self->{_resultset}->cursor->reset->next;
+ return $row;
}
=head2 min
}
}
+=head2 _resultset
+
+=over 4
+
+=item Arguments: none
+
+=item Return Value: $resultset
+
+=back
+
+ $year_col->_resultset->next
+
+Returns the underlying resultset. Creates it from the parent resultset if
+necessary.
+
+=cut
+
+sub _resultset {
+ my $self = shift;
+
+ return $self->{_resultset} ||= $self->{_parent_resultset}->search(undef,
+ {
+ select => [$self->{_select}],
+ as => [$self->{_as}]
+ }
+ );
+}
+
1;