1 package DBIx::Class::InflateColumn::DateTime;
5 use base qw/DBIx::Class/;
6 use Carp::Clan qw/^DBIx::Class/;
10 DBIx::Class::InflateColumn::DateTime - Auto-create DateTime objects from date and datetime columns.
14 Load this component and then declare one or more
15 columns to be of the datetime, timestamp or date datatype.
18 __PACKAGE__->load_components(qw/InflateColumn::DateTime Core/);
19 __PACKAGE__->add_columns(
20 starts_when => { data_type => 'datetime' }
23 NOTE: You B<must> load C<InflateColumn::DateTime> B<before> C<Core>. See
24 L<DBIx::Class::Manual::Component> for details.
26 Then you can treat the specified column as a L<DateTime> object.
28 print "This event starts the month of ".
29 $event->starts_when->month_name();
31 If you want to set a specific timezone and locale for that field, use:
33 __PACKAGE__->add_columns(
34 starts_when => { data_type => 'datetime', timezone => "America/Chicago", locale => "de_DE" }
37 If you want to inflate no matter what data_type your column is,
38 use inflate_datetime or inflate_date:
40 __PACKAGE__->add_columns(
41 starts_when => { data_type => 'varchar', inflate_datetime => 1 }
44 __PACKAGE__->add_columns(
45 starts_when => { data_type => 'varchar', inflate_date => 1 }
48 It's also possible to explicitly skip inflation:
50 __PACKAGE__->add_columns(
51 starts_when => { data_type => 'datetime', inflate_datetime => 0 }
56 This module figures out the type of DateTime::Format::* class to
57 inflate/deflate with based on the type of DBIx::Class::Storage::DBI::*
58 that you are using. If you switch from one database to a different
59 one your code should continue to work without modification (though note
60 that this feature is new as of 0.07, so it may not be perfect yet - bug
61 reports to the list very much welcome).
63 For more help with using components, see L<DBIx::Class::Manual::Component/USING>.
67 __PACKAGE__->load_components(qw/InflateColumn/);
69 __PACKAGE__->mk_group_accessors('simple' => '__datetime_parser');
71 =head2 register_column
73 Chains with the L<DBIx::Class::Row/register_column> method, and sets
74 up datetime columns appropriately. This would not normally be
75 directly called by end users.
77 In the case of an invalid date, L<DateTime> will throw an exception. To
78 bypass these exceptions and just have the inflation return undef, use
79 the C<datetime_undef_if_invalid> option in the column info:
83 data_type => "datetime",
84 default_value => '0000-00-00',
86 datetime_undef_if_invalid => 1
92 my ($self, $column, $info, @rest) = @_;
93 $self->next::method($column, $info, @rest);
94 return unless defined($info->{data_type});
98 for (qw/date datetime timestamp/) {
99 my $key = "inflate_${_}";
101 next unless exists $info->{$key};
102 return unless $info->{$key};
109 $type = lc($info->{data_type});
110 if ($type eq "timestamp with time zone" || $type eq "timestamptz") {
112 $info->{_ic_dt_method} ||= "timestamp_with_timezone";
117 if ( defined $info->{extra}{timezone} ) {
118 carp "Putting timezone into extra => { timezone => '...' } has been deprecated, ".
119 "please put it directly into the '$column' column definition.";
120 $timezone = $info->{extra}{timezone};
124 if ( defined $info->{extra}{locale} ) {
125 carp "Putting locale into extra => { locale => '...' } has been deprecated, ".
126 "please put it directly into the '$column' column definition.";
127 $locale = $info->{extra}{locale};
130 $locale = $info->{locale} if defined $info->{locale};
131 $timezone = $info->{timezone} if defined $info->{timezone};
133 my $undef_if_invalid = $info->{datetime_undef_if_invalid};
135 if ($type eq 'datetime' || $type eq 'date' || $type eq 'timestamp') {
136 # This shallow copy of %info avoids t/52_cycle.t treating
137 # the resulting deflator as a circular reference.
138 my %info = ( '_ic_dt_method' => $type , %{ $info } );
140 if (defined $info->{extra}{floating_tz_ok}) {
141 carp "Putting floating_tz_ok into extra => { floating_tz_ok => 1 } has been deprecated, ".
142 "please put it directly into the '$column' column definition.";
143 $info{floating_tz_ok} = $info->{extra}{floating_tz_ok};
146 $self->inflate_column(
150 my ($value, $obj) = @_;
152 my $dt = eval { $obj->_inflate_to_datetime( $value, \%info ) };
154 return undef if ($undef_if_invalid);
155 $self->throw_exception ("Error while inflating ${value} for ${column} on ${self}: $err");
158 $dt->set_time_zone($timezone) if $timezone;
159 $dt->set_locale($locale) if $locale;
163 my ($value, $obj) = @_;
165 carp "You're using a floating timezone, please see the documentation of"
166 . " DBIx::Class::InflateColumn::DateTime for an explanation"
167 if ref( $value->time_zone ) eq 'DateTime::TimeZone::Floating'
168 and not $info{floating_tz_ok}
169 and not $ENV{DBIC_FLOATING_TZ_OK};
170 $value->set_time_zone($timezone);
171 $value->set_locale($locale) if $locale;
173 $obj->_deflate_from_datetime( $value, \%info );
180 sub _flate_or_fallback
182 my( $self, $value, $info, $method_fmt ) = @_;
184 my $parser = $self->_datetime_parser;
185 my $preferred_method = sprintf($method_fmt, $info->{ _ic_dt_method });
186 my $method = $parser->can($preferred_method) ? $preferred_method : sprintf($method_fmt, 'datetime');
187 return $parser->$method($value);
190 sub _inflate_to_datetime {
191 my( $self, $value, $info ) = @_;
192 return $self->_flate_or_fallback( $value, $info, 'parse_%s' );
195 sub _deflate_from_datetime {
196 my( $self, $value, $info ) = @_;
197 return $self->_flate_or_fallback( $value, $info, 'format_%s' );
200 sub _datetime_parser {
202 if (my $parser = $self->__datetime_parser) {
205 my $parser = $self->result_source->storage->datetime_parser(@_);
206 return $self->__datetime_parser($parser);
214 If you have a datetime column with an associated C<timezone>, and subsequently
215 create/update this column with a DateTime object in the L<DateTime::TimeZone::Floating>
216 timezone, you will get a warning (as there is a very good chance this will not have the
217 result you expect). For example:
219 __PACKAGE__->add_columns(
220 starts_when => { data_type => 'datetime', timezone => "America/Chicago" }
223 my $event = $schema->resultset('EventTZ')->create({
224 starts_at => DateTime->new(year=>2007, month=>12, day=>31, ),
227 The warning can be avoided in several ways:
231 =item Fix your broken code
233 When calling C<set_time_zone> on a Floating DateTime object, the timezone is simply
234 set to the requested value, and B<no time conversion takes place>. It is always a good idea
235 to be supply explicit times to the database:
237 my $event = $schema->resultset('EventTZ')->create({
238 starts_at => DateTime->new(year=>2007, month=>12, day=>31, time_zone => "America/Chicago" ),
241 =item Suppress the check on per-column basis
243 __PACKAGE__->add_columns(
244 starts_when => { data_type => 'datetime', timezone => "America/Chicago", floating_tz_ok => 1 }
247 =item Suppress the check globally
249 Set the environment variable DBIC_FLOATING_TZ_OK to some true value.
253 Putting extra attributes like timezone, locale or floating_tz_ok into extra => {} has been
254 B<DEPRECATED> because this gets you into trouble using L<DBIx::Class::Schema::Versioned>.
255 Instead put it directly into the columns definition like in the examples above. If you still
256 use the old way you'll see a warning - please fix your code then!
262 =item More information about the add_columns method, and column metadata,
263 can be found in the documentation for L<DBIx::Class::ResultSource>.
265 =item Further discussion of problems inherent to the Floating timezone:
266 L<Floating DateTimes|DateTime/Floating_DateTimes>
267 and L<< $dt->set_time_zone|DateTime/"Set" Methods >>
273 Matt S. Trout <mst@shadowcatsystems.co.uk>
277 Aran Deltac <bluefeet@cpan.org>
281 You may distribute this code under the same terms as Perl itself.