Profile of DBIx/Class/InflateColumn.pm

Filename	/usr/share/perl5/DBIx/Class/InflateColumn.pm
Statements	Executed 1109 statements in 4.10ms

Subroutines
Calls	P	F	Exclusive Time	Inclusive Time	Subroutine
122	1	1	3.30ms	39.5ms	DBIx::Class::InflateColumn::inflate_column
1	1	1	21µs	35µs	DBIx::Class::InflateColumn::::BEGIN@3DBIx::Class::InflateColumn::BEGIN@3
1	1	1	10µs	14.8ms	DBIx::Class::InflateColumn::::BEGIN@6DBIx::Class::InflateColumn::BEGIN@6
1	1	1	10µs	35µs	DBIx::Class::InflateColumn::::BEGIN@7DBIx::Class::InflateColumn::BEGIN@7
1	1	1	10µs	20µs	DBIx::Class::InflateColumn::::BEGIN@4DBIx::Class::InflateColumn::BEGIN@4
1	1	1	8µs	95µs	DBIx::Class::InflateColumn::::BEGIN@8DBIx::Class::InflateColumn::BEGIN@8
0	0	0	0s	0s	DBIx::Class::InflateColumn::_deflated_column
0	0	0	0s	0s	DBIx::Class::InflateColumn::_inflated_column
0	0	0	0s	0s	DBIx::Class::InflateColumn::get_inflated_column
0	0	0	0s	0s	DBIx::Class::InflateColumn::set_inflated_column
0	0	0	0s	0s	DBIx::Class::InflateColumn::store_inflated_column

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

Line	State ments	Time on line	Calls	Time in subs	Code
1					package DBIx::Class::InflateColumn;
2
3	2	50µs	2	49µs	# spent 35µs (21+14) within DBIx::Class::InflateColumn::BEGIN@3 which was called: # once (21µs+14µs) by Class::C3::Componentised::ensure_class_loaded at line 3 use strict; # spent 35µs making 1 call to DBIx::Class::InflateColumn::BEGIN@3 # spent 14µs making 1 call to strict::import
4	2	42µs	2	30µs	# spent 20µs (10+10) within DBIx::Class::InflateColumn::BEGIN@4 which was called: # once (10µs+10µs) by Class::C3::Componentised::ensure_class_loaded at line 4 use warnings; # spent 20µs making 1 call to DBIx::Class::InflateColumn::BEGIN@4 # spent 10µs making 1 call to warnings::import
5
6	2	204µs	2	14.8ms	# spent 14.8ms (10µs+14.8) within DBIx::Class::InflateColumn::BEGIN@6 which was called: # once (10µs+14.8ms) by Class::C3::Componentised::ensure_class_loaded at line 6 use base 'DBIx::Class::Row'; # spent 14.8ms making 1 call to DBIx::Class::InflateColumn::BEGIN@6 # spent 14.8ms making 1 call to base::import, recursion: max depth 1, sum of overlapping time 14.8ms
7	2	56µs	2	60µs	# spent 35µs (10+25) within DBIx::Class::InflateColumn::BEGIN@7 which was called: # once (10µs+25µs) by Class::C3::Componentised::ensure_class_loaded at line 7 use SQL::Abstract 'is_literal_value'; # spent 35µs making 1 call to DBIx::Class::InflateColumn::BEGIN@7 # spent 25µs making 1 call to Exporter::import
8	2	717µs	2	182µs	# spent 95µs (8+87) within DBIx::Class::InflateColumn::BEGIN@8 which was called: # once (8µs+87µs) by Class::C3::Componentised::ensure_class_loaded at line 8 use namespace::clean; # spent 95µs making 1 call to DBIx::Class::InflateColumn::BEGIN@8 # spent 87µs making 1 call to namespace::clean::import
9
10					=head1 NAME
11
12					DBIx::Class::InflateColumn - Automatically create references from column data
13
14					=head1 SYNOPSIS
15
16					# In your table classes
17					__PACKAGE__->inflate_column('column_name', {
18					inflate => sub {
19					my ($raw_value_from_db, $result_object) = @_;
20					...
21					},
22					deflate => sub {
23					my ($inflated_value_from_user, $result_object) = @_;
24					...
25					},
26					});
27
28					=head1 DESCRIPTION
29
30					This component translates column data into references, i.e. "inflating"
31					the column data. It also "deflates" references into an appropriate format
32					for the database.
33
34					It can be used, for example, to automatically convert to and from
35					L<DateTime> objects for your date and time fields. There's a
36					convenience component to actually do that though, try
37					L<DBIx::Class::InflateColumn::DateTime>.
38
39					It will handle all types of references except scalar references. It
40					will not handle scalar values, these are ignored and thus passed
41					through to L<SQL::Abstract>. This is to allow setting raw values to
42					"just work". Scalar references are passed through to the database to
43					deal with, to allow such settings as C< \'year + 1'> and C< \'DEFAULT' >
44					to work.
45
46					If you want to filter plain scalar values and replace them with
47					something else, see L<DBIx::Class::FilterColumn>.
48
49					=head1 METHODS
50
51					=head2 inflate_column
52
53					Instruct L<DBIx::Class> to inflate the given column.
54
55					In addition to the column name, you must provide C<inflate> and
56					C<deflate> methods. The C<inflate> method is called when you access
57					the field, while the C<deflate> method is called when the field needs
58					to used by the database.
59
60					For example, if you have a table C<events> with a timestamp field
61					named C<insert_time>, you could inflate the column in the
62					corresponding table class using something like:
63
64					__PACKAGE__->inflate_column('insert_time', {
65					inflate => sub {
66					my ($insert_time_raw_value, $event_result_object) = @_;
67					DateTime->from_epoch( epoch => $insert_time_raw_value );
68					},
69					deflate => sub {
70					my ($insert_time_dt_object, $event_result_object) = @_;
71					$insert_time_dt_object->epoch;
72					},
73					});
74
75					The coderefs you set for inflate and deflate are called with two parameters,
76					the first is the value of the column to be inflated/deflated, the second is
77					the result object itself.
78
79					In this example, calls to an event's C<insert_time> accessor return a
80					L<DateTime> object. This L<DateTime> object is later "deflated" back
81					to the integer epoch representation when used in the database layer.
82					For a much more thorough handling of the above example, please see
83					L<DBIx::Class::DateTime::Epoch>
84
85					=cut
86
87					# spent 39.5ms (3.30+36.2) within DBIx::Class::InflateColumn::inflate_column which was called 122 times, avg 324µs/call: # 122 times (3.30ms+36.2ms) by DBIx::Class::Relationship::Accessor::add_relationship_accessor at line 95 of DBIx/Class/Relationship/Accessor.pm, avg 324µs/call sub inflate_column {
88	122	59µs			my ($self, $col, $attrs) = @_;
89
90	122	1.54ms	122	2.29ms	my $colinfo = $self->column_info($col); # spent 2.29ms making 122 calls to DBIx::Class::ResultSourceProxy::column_info, avg 19µs/call
91
92	122	79µs			$self->throw_exception("InflateColumn can not be used on a column with a declared FilterColumn filter")
93					if defined $colinfo->{_filter_info} and $self->isa('DBIx::Class::FilterColumn');
94
95	122	192µs	122	1.33ms	$self->throw_exception("No such column $col to inflate") # spent 1.33ms making 122 calls to DBIx::Class::ResultSourceProxy::has_column, avg 11µs/call
96					unless $self->has_column($col);
97	122	76µs			$self->throw_exception("inflate_column needs attr hashref")
98					unless ref $attrs eq 'HASH';
99	122	101µs			$colinfo->{_inflate_info} = $attrs;
100	122	47µs			my $acc = $colinfo->{accessor};
101	122	654µs	122	32.5ms	$self->mk_group_accessors('inflated_column' => [ (defined $acc ? $acc : $col), $col]); # spent 32.5ms making 122 calls to Class::Accessor::Grouped::mk_group_accessors, avg 267µs/call
102	122	271µs			return 1;
103					}
104
105					sub _inflated_column {
106					my ($self, $col, $value) = @_;
107
108					return $value if (
109					! defined $value # NULL is NULL is NULL
110					or
111					is_literal_value($value) #that would be a not-yet-reloaded literal update
112					);
113
114					my $info = $self->result_source->column_info($col)
115					or $self->throw_exception("No column info for $col");
116
117					return $value unless exists $info->{_inflate_info};
118
119					return (
120					$info->{_inflate_info}{inflate}
121					\|\|
122					$self->throw_exception("No inflator found for '$col'")
123					)->($value, $self);
124					}
125
126					sub _deflated_column {
127					my ($self, $col, $value) = @_;
128
129					## Deflate any refs except for literals, pass through plain values
130					return $value if (
131					! length ref $value
132					or
133					is_literal_value($value)
134					);
135
136					my $info = $self->result_source->column_info($col) or
137					$self->throw_exception("No column info for $col");
138
139					return $value unless exists $info->{_inflate_info};
140
141					return (
142					$info->{_inflate_info}{deflate}
143					\|\|
144					$self->throw_exception("No deflator found for '$col'")
145					)->($value, $self);
146					}
147
148					=head2 get_inflated_column
149
150					my $val = $obj->get_inflated_column($col);
151
152					Fetch a column value in its inflated state. This is directly
153					analogous to L<DBIx::Class::Row/get_column> in that it only fetches a
154					column already retrieved from the database, and then inflates it.
155					Throws an exception if the column requested is not an inflated column.
156
157					=cut
158
159					sub get_inflated_column {
160					my ($self, $col) = @_;
161
162					$self->throw_exception("$col is not an inflated column")
163					unless exists $self->result_source->column_info($col)->{_inflate_info};
164
165					# we take care of keeping things in sync
166					return $self->{_inflated_column}{$col}
167					if exists $self->{_inflated_column}{$col};
168
169					my $val = $self->get_column($col);
170
171					return $self->{_inflated_column}{$col} = $self->_inflated_column($col, $val);
172					}
173
174					=head2 set_inflated_column
175
176					my $copy = $obj->set_inflated_column($col => $val);
177
178					Sets a column value from an inflated value. This is directly
179					analogous to L<DBIx::Class::Row/set_column>.
180
181					=cut
182
183					sub set_inflated_column {
184					my ($self, $col, $value) = @_;
185
186					# pass through deflated stuff
187					if (! length ref $value or is_literal_value($value)) {
188					$self->set_column($col, $value);
189					delete $self->{_inflated_column}{$col};
190					}
191					# need to call set_column with the deflate cycle so that
192					# relationship caches are nuked if any
193					# also does the compare-for-dirtyness and change tracking dance
194					else {
195					$self->set_column($col, $self->_deflated_column($col, $value));
196					$self->{_inflated_column}{$col} = $value;
197					}
198
199					return $value;
200					}
201
202					=head2 store_inflated_column
203
204					my $copy = $obj->store_inflated_column($col => $val);
205
206					Sets a column value from an inflated value without marking the column
207					as dirty. This is directly analogous to L<DBIx::Class::Row/store_column>.
208
209					=cut
210
211					sub store_inflated_column {
212					my ($self, $col, $value) = @_;
213
214					if (! length ref $value or is_literal_value($value)) {
215					delete $self->{_inflated_column}{$col};
216					$self->store_column($col => $value);
217					}
218					else {
219					delete $self->{_column_data}{$col};
220					$self->{_inflated_column}{$col} = $value;
221					}
222
223					return $value;
224					}
225
226					=head1 SEE ALSO
227
228					=over 4
229
230					=item L<DBIx::Class::Core> - This component is loaded as part of the
231					C<core> L<DBIx::Class> components; generally there is no need to
232					load it directly
233
234					=back
235
236					=head1 FURTHER QUESTIONS?
237
238					Check the list of L<additional DBIC resources\|DBIx::Class/GETTING HELP/SUPPORT>.
239
240					=head1 COPYRIGHT AND LICENSE
241
242					This module is free software L<copyright\|DBIx::Class/COPYRIGHT AND LICENSE>
243					by the L<DBIx::Class (DBIC) authors\|DBIx::Class/AUTHORS>. You can
244					redistribute it and/or modify it under the same terms as the
245					L<DBIx::Class library\|DBIx::Class/COPYRIGHT AND LICENSE>.
246
247					=cut
248
249	1	2µs	1	44µs	1; # spent 44µs making 1 call to B::Hooks::EndOfScope::XS::__ANON__