use strict;
use warnings;
+use base qw/DBIx::Class::Row/;
+
+=head1 NAME
+
+DBIx::Class::InflateColumn - Automatically create objects from column data
+
+=head1 SYNOPSIS
+
+ # In your table classes
+ __PACKAGE__->inflate_column('column_name', {
+ inflate => sub { ... },
+ deflate => sub { ... },
+ });
+
+=head1 DESCRIPTION
+
+This component translates column data into objects, i.e. "inflating"
+the column data. It also "deflates" objects into an appropriate format
+for the database.
+
+It can be used, for example, to automatically convert to and from
+L<DateTime> objects for your date and time fields.
+
+=head1 METHODS
+
+=head2 inflate_column
+
+Instruct L<DBIx::Class> to inflate the given column.
+
+In addition to the column name, you must provide C<inflate> and
+C<deflate> methods. The C<inflate> method is called when you access
+the field, while the C<deflate> method is called when the field needs
+to used by the database.
+
+For example, if you have a table C<events> with a timestamp field
+named C<insert_time>, you could inflate the column in the
+corresponding table class using something like:
+
+ __PACKAGE__->inflate_column('insert_time', {
+ inflate => sub { DateTime::Format::Pg->parse_datetime(shift); },
+ deflate => sub { DateTime::Format::Pg->format_datetime(shift); },
+ });
+
+(Replace L<DateTime::Format::Pg> with the appropriate module for your
+database, or consider L<DateTime::Format::DBI>.)
+
+In this example, calls to an event's C<insert_time> accessor return a
+L<DateTime> object. This L<DateTime> object is later "deflated" when
+used in the database layer.
+
+=cut
sub inflate_column {
my ($self, $col, $attrs) = @_;
sub set_inflated_column {
my ($self, $col, @rest) = @_;
- my $ret = $self->store_inflated_column($col, @rest);
- $self->{_dirty_columns}{$col} = 1;
+ my $ret = $self->_inflated_column_op('set', $col, @rest);
return $ret;
}
sub store_inflated_column {
- my ($self, $col, $obj) = @_;
+ my ($self, $col, @rest) = @_;
+ my $ret = $self->_inflated_column_op('store', $col, @rest);
+ return $ret;
+}
+
+sub _inflated_column_op {
+ my ($self, $op, $col, $obj) = @_;
+ my $meth = "${op}_column";
unless (ref $obj) {
delete $self->{_inflated_column}{$col};
- return $self->store_column($col, $obj);
+ return $self->$meth($col, $obj);
}
my $deflated = $self->_deflated_column($col, $obj);
# Do this now so we don't store if it's invalid
$self->{_inflated_column}{$col} = $obj;
- #warn "Storing $obj: ".($obj->_ident_values)[0];
- $self->store_column($col, $deflated);
+ $self->$meth($col, $deflated);
return $obj;
}
return $class->next::method($attrs, @rest);
}
+=head1 SEE ALSO
+
+=over 4
+
+=item L<DBIx::Class::Core> - This component is loaded as part of the
+ "core" L<DBIx::Class> components; generally there is no need to
+ load it directly
+
+=back
+
+=head1 AUTHOR
+
+Matt S. Trout <mst@shadowcatsystems.co.uk>
+
+=head1 CONTRIBUTORS
+
+Daniel Westermann-Clark <danieltwc@cpan.org> (documentation)
+
+=head1 LICENSE
+
+You may distribute this code under the same terms as Perl itself.
+
+=cut
+
1;