use strict;
use warnings;
+
+
use base qw/DBIx::Class::Row/;
-=head1 NAME
+=head1 NAME
DBIx::Class::InflateColumn - Automatically create objects from column data
for the database.
It can be used, for example, to automatically convert to and from
-L<DateTime> objects for your date and time fields.
+L<DateTime> objects for your date and time fields.
=head1 METHODS
=head2 inflate_column
-Instruct L<DBIx::Class> to inflate the given 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
(Replace L<DateTime::Format::Pg> with the appropriate module for your
database, or consider L<DateTime::Format::DBI>.)
+The coderefs you set for inflate and deflate are called with two parameters,
+the first is the value of the column to be inflated/deflated, the second is the
+row object itself. Thus you can call C<< ->result_source->schema->storage->dbh >> on
+it, to feed to 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.
sub inflate_column {
my ($self, $col, $attrs) = @_;
- die "No such column $col to inflate" unless $self->has_column($col);
- die "inflate_column needs attr hashref" unless ref $attrs eq 'HASH';
+ $self->throw_exception("No such column $col to inflate")
+ unless $self->has_column($col);
+ $self->throw_exception("inflate_column needs attr hashref")
+ unless ref $attrs eq 'HASH';
$self->column_info($col)->{_inflate_info} = $attrs;
$self->mk_group_accessors('inflated_column' => $col);
return 1;
sub _inflated_column {
my ($self, $col, $value) = @_;
return $value unless defined $value; # NULL is NULL is NULL
- my $info = $self->column_info($col) || die "No column info for $col";
+ my $info = $self->column_info($col)
+ or $self->throw_exception("No column info for $col");
return $value unless exists $info->{_inflate_info};
my $inflate = $info->{_inflate_info}{inflate};
- die "No inflator for $col" unless defined $inflate;
+ $self->throw_exception("No inflator for $col") unless defined $inflate;
return $inflate->($value, $self);
}
sub _deflated_column {
my ($self, $col, $value) = @_;
return $value unless ref $value; # If it's not an object, don't touch it
- my $info = $self->column_info($col) || die "No column info for $col";
+ my $info = $self->column_info($col) or
+ $self->throw_exception("No column info for $col");
return $value unless exists $info->{_inflate_info};
my $deflate = $info->{_inflate_info}{deflate};
- die "No deflator for $col" unless defined $deflate;
+ $self->throw_exception("No deflator for $col") unless defined $deflate;
return $deflate->($value, $self);
}
+=head2 get_inflated_column
+
+ my $val = $obj->get_inflated_column($col);
+
+Fetch a column value in its inflated state. This is directly
+analogous to L<DBIx::Class::Row/get_column> in that it only fetches a
+column already retreived from the database, and then inflates it.
+Throws an exception if the column requested is not an inflated column.
+
+=cut
+
sub get_inflated_column {
my ($self, $col) = @_;
- $self->throw("$col is not an inflated column") unless
- exists $self->column_info($col)->{_inflate_info};
+ $self->throw_exception("$col is not an inflated column")
+ unless exists $self->column_info($col)->{_inflate_info};
return $self->{_inflated_column}{$col}
if exists $self->{_inflated_column}{$col};
$self->_inflated_column($col, $self->get_column($col));
}
+=head2 set_inflated_column
+
+ my $copy = $obj->set_inflated_column($col => $val);
+
+Sets a column value from an inflated value. This is directly
+analogous to L<DBIx::Class::Row/set_column>.
+
+=cut
+
sub set_inflated_column {
my ($self, $col, @rest) = @_;
my $ret = $self->_inflated_column_op('set', $col, @rest);
return $ret;
}
+=head2 store_inflated_column
+
+ my $copy = $obj->store_inflated_column($col => $val);
+
+Sets a column value from an inflated value without marking the column
+as dirty. This is directly analogous to
+L<DBIx::Class::Row/store_column>.
+
+=cut
+
sub store_inflated_column {
my ($self, $col, @rest) = @_;
my $ret = $self->_inflated_column_op('store', $col, @rest);
return $obj;
}
+=head2 update
+
+Updates a row in the same way as L<DBIx::Class::Row/update>, handling
+inflation and deflation of columns appropriately.
+
+=cut
+
+sub update {
+ my ($class, $attrs, @rest) = @_;
+ $attrs ||= {};
+ foreach my $key (keys %$attrs) {
+ if (ref $attrs->{$key}
+ && exists $class->column_info($key)->{_inflate_info}) {
+# $attrs->{$key} = $class->_deflated_column($key, $attrs->{$key});
+ $class->set_inflated_column ($key, delete $attrs->{$key});
+ }
+ }
+ return $class->next::method($attrs, @rest);
+}
+
+=head2 new
+
+Creates a row in the same way as L<DBIx::Class::Row/new>, handling
+inflation and deflation of columns appropriately.
+
+=cut
+
sub new {
my ($class, $attrs, @rest) = @_;
$attrs ||= {};
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