Profile of /project/perl/lib/Class/DBI/Cascade/None.pm

File	/project/perl/lib/Class/DBI/Cascade/None.pm
Statements Executed	11
Statement Execution Time	493µs

Subroutines — ordered by exclusive time
Calls	P	F	Exclusive Time	Inclusive Time	Subroutine
2	1	1	99µs	99µs	Class::DBI::Cascade::None::::newClass::DBI::Cascade::None::new
0	0	0	0s	0s	Class::DBI::Cascade::None::::BEGINClass::DBI::Cascade::None::BEGIN
0	0	0	0s	0s	Class::DBI::Cascade::None::::cascadeClass::DBI::Cascade::None::cascade
0	0	0	0s	0s	Class::DBI::Cascade::None::foreign_for

Call graph for these subroutines as a Graphviz dot language file.

Line	State ments	Time on line	Calls	Time in subs	Code
1					package Class::DBI::Cascade::None;
2
3					=head1 NAME
4
5					Class::DBI::Cascade::None - Do nothing upon deletion
6
7					=head1 DESCRIPTION
8
9					This is a Cascading Delete strategy that will do nothing, leaving
10					orphaned records behind.
11
12					It is the base class for most ofther Cascade strategies, and so provides
13					several important methods:
14
15					=head1 CONSTRUCTOR
16
17					=head2 new
18
19					my $strategy = Cascade::Class->new($Relationship);
20
21					This must be instantiated with a Class::DBI::Relationship object.
22
23					=head1 METHODS
24
25					=head2 foreign_for
26
27					my $iterator = $strategy->foreign_for($obj);
28
29					This will return all the objects which are foreign to $obj across the
30					relationship. It's a normal Class::DBI search you can get the results
31					either as a list or as an iterator.
32
33					=head2 cascade
34
35					$strategy->cascade($obj);
36
37					Cascade across the related objects to $obj.
38
39					=head1 WRITING NEW STRATEGIES
40
41					Creating a Cascade strategy should be fairly simple. You usually just
42					need to inherit from here, and then supply a cascade() method that does
43					the required thing with the results from foreign_for().
44
45					So, for example, Cascade::Delete is implemented simply as:
46
47					package Class::DBI::Cascade::Delete;
48
49					use base 'Class::DBI::Cascade::None';
50
51					sub cascade {
52					my ($self, $obj) = @_;
53					$self->foreign_for($obj)->delete_all;
54					}
55
56					=cut
57
58	3	87µs	1	26µs	use strict; # spent 26µs making 1 call to strict::import
59	3	285µs	1	116µs	use warnings; # spent 116µs making 1 call to warnings::import
60
61					# spent 99µs within Class::DBI::Cascade::None::new which was called 2 times, avg 50µs/call: # 2 times (99µs+0s) by Class::DBI::Relationship::HasMany::triggers at line 74 of Class/DBI/Relationship/HasMany.pm, avg 50µs/call sub new {
62	2	15µs			my ($class, $rel) = @_;
63	2	94µs			bless { _rel => $rel } => $class;
64					}
65
66					sub foreign_for {
67					my ($self, $obj) = @_;
68					return $self->{_rel}
69					->foreign_class->search($self->{_rel}->args->{foreign_key} => $obj->id);
70					}
71
72					sub cascade { return; }
73
74	1	12µs			1;