1 package DBIx::Class::InflateColumn::DateTime;
5 use base qw/DBIx::Class/;
9 DBIx::Class::InflateColumn::DateTime - Auto-create DateTime objects from date and datetime columns.
13 Load this component and then declare one or more
14 columns to be of the datetime, timestamp or date datatype.
17 __PACKAGE__->load_components(qw/InflateColumn::DateTime Core/);
18 __PACKAGE__->add_columns(
19 starts_when => { data_type => 'datetime' }
22 NOTE: You B<must> load C<InflateColumn::DateTime> B<before> C<Core>. See
23 L<DBIx::Class::Manual::Component> for details.
25 Then you can treat the specified column as a L<DateTime> object.
27 print "This event starts the month of ".
28 $event->starts_when->month_name();
30 If you want to set a specific timezone and locale for that field, use:
32 __PACKAGE__->add_columns(
33 starts_when => { data_type => 'datetime', extra => { timezone => "America/Chicago", locale => "de_DE" } }
36 If you want to inflate no matter what data_type your column is,
37 use inflate_datetime or inflate_date:
39 __PACKAGE__->add_columns(
40 starts_when => { data_type => 'varchar', inflate_datetime => 1 }
43 __PACKAGE__->add_columns(
44 starts_when => { data_type => 'varchar', inflate_date => 1 }
47 It's also possible to explicitly skip inflation:
49 __PACKAGE__->add_columns(
50 starts_when => { data_type => 'datetime', inflate_datetime => 0 }
55 This module figures out the type of DateTime::Format::* class to
56 inflate/deflate with based on the type of DBIx::Class::Storage::DBI::*
57 that you are using. If you switch from one database to a different
58 one your code should continue to work without modification (though note
59 that this feature is new as of 0.07, so it may not be perfect yet - bug
60 reports to the list very much welcome).
62 For more help with using components, see L<DBIx::Class::Manual::Component/USING>.
66 __PACKAGE__->load_components(qw/InflateColumn/);
68 __PACKAGE__->mk_group_accessors('simple' => '__datetime_parser');
70 =head2 register_column
72 Chains with the L<DBIx::Class::Row/register_column> method, and sets
73 up datetime columns appropriately. This would not normally be
74 directly called by end users.
76 In the case of an invalid date, L<DateTime> will throw an exception. To
77 bypass these exceptions and just have the inflation return undef, use
78 the C<datetime_undef_if_invalid> option in the column info:
82 data_type => "datetime",
83 default_value => '0000-00-00',
85 datetime_undef_if_invalid => 1
91 my ($self, $column, $info, @rest) = @_;
92 $self->next::method($column, $info, @rest);
93 return unless defined($info->{data_type});
97 for (qw/date datetime/) {
98 my $key = "inflate_${_}";
100 next unless exists $info->{$key};
101 return unless $info->{$key};
108 $type = lc($info->{data_type});
109 $type = 'datetime' if ($type =~ /^timestamp/);
113 if ( defined $info->{extra}{timezone} ) {
114 $timezone = $info->{extra}{timezone};
118 if ( defined $info->{extra}{locale} ) {
119 $locale = $info->{extra}{locale};
122 my $undef_if_invalid = $info->{datetime_undef_if_invalid};
124 if ($type eq 'datetime' || $type eq 'date') {
125 my ($parse, $format) = ("parse_${type}", "format_${type}");
127 # This assignment must happen here, otherwise Devel::Cycle treats
128 # the resulting deflator as a circular reference (go figure):
131 # DBICTest::Schema A->{source_registrations} => %B
132 # %B->{Event} => DBIx::Class::ResultSource::Table C
133 # DBIx::Class::ResultSource::Table C->{_columns} => %D
134 # %D->{created_on} => %E
135 # %E->{_inflate_info} => %F
136 # %F->{deflate} => &G
137 # closure &G, $info => $H
140 my $floating_tz_ok = $info->{extra}{floating_tz_ok};
142 $self->inflate_column(
146 my ($value, $obj) = @_;
147 my $dt = eval { $obj->_datetime_parser->$parse($value); };
148 die "Error while inflating ${value} for ${column} on ${self}: $@"
149 if $@ and not $undef_if_invalid;
150 $dt->set_time_zone($timezone) if $timezone;
151 $dt->set_locale($locale) if $locale;
155 my ($value, $obj) = @_;
157 warn "You're using a floating timezone, please see the documentation of"
158 . " DBIx::Class::InflateColumn::DateTime for an explanation"
159 if ref( $value->time_zone ) eq 'DateTime::TimeZone::Floating'
160 and not $floating_tz_ok
161 and not $ENV{DBIC_FLOATING_TZ_OK};
162 $value->set_time_zone($timezone);
163 $value->set_locale($locale) if $locale;
165 $obj->_datetime_parser->$format($value);
172 sub _datetime_parser {
174 if (my $parser = $self->__datetime_parser) {
177 my $parser = $self->result_source->storage->datetime_parser(@_);
178 return $self->__datetime_parser($parser);
186 If you have a datetime column with the C<timezone> extra setting, and subsenquently
187 create/update this column with a DateTime object in the L<DateTime::TimeZone::Floating>
188 timezone, you will get a warning (as there is a very good chance this will not have the
189 result you expect). For example:
191 __PACKAGE__->add_columns(
192 starts_when => { data_type => 'datetime', extra => { timezone => "America/Chicago" } }
195 my $event = $schema->resultset('EventTZ')->create({
196 starts_at => DateTime->new(year=>2007, month=>12, day=>31, ),
199 The warning can be avoided in several ways:
203 =item Fix your broken code
205 When calling C<set_time_zone> on a Floating DateTime object, the timezone is simply
206 set to the requested value, and B<no time conversion takes place>. It is always a good idea
207 to be supply explicit times to the database:
209 my $event = $schema->resultset('EventTZ')->create({
210 starts_at => DateTime->new(year=>2007, month=>12, day=>31, time_zone => "America/Chicago" ),
213 =item Suppress the check on per-column basis
215 __PACKAGE__->add_columns(
216 starts_when => { data_type => 'datetime', extra => { timezone => "America/Chicago", floating_tz_ok => 1 } }
219 =item Suppress the check globally
221 Set the environment variable DBIC_FLOATING_TZ_OK to some true value.
231 =item More information about the add_columns method, and column metadata,
232 can be found in the documentation for L<DBIx::Class::ResultSource>.
234 =item Further discussion of problems inherent to the Floating timezone:
235 L<Floating DateTimes|DateTime/Floating_DateTimes>
236 and L<< $dt->set_time_zone|DateTime/"Set" Methods >>
242 Matt S. Trout <mst@shadowcatsystems.co.uk>
246 Aran Deltac <bluefeet@cpan.org>
250 You may distribute this code under the same terms as Perl itself.