189 lines
7.6 KiB
Plaintext
189 lines
7.6 KiB
Plaintext
=for comment POD_DERIVED_INDEX_GENERATED
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The following documentation is automatically generated. Please do not edit
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this file, but rather the original, inline with DBIx::Class::InflateColumn::DateTime
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at lib/DBIx/Class/InflateColumn/DateTime.pm
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(on the system that originally ran this).
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If you do edit this file, and don't want your changes to be removed, make
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sure you change the first line.
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=cut
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=head1 NAME
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DBIx::Class::InflateColumn::DateTime - Auto-create DateTime objects from date and datetime columns.
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=head1 SYNOPSIS
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Load this component and then declare one or more
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columns to be of the datetime, timestamp or date datatype.
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package Event;
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use base 'DBIx::Class::Core';
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__PACKAGE__->load_components(qw/InflateColumn::DateTime/);
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__PACKAGE__->add_columns(
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starts_when => { data_type => 'datetime' }
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create_date => { data_type => 'date' }
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);
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Then you can treat the specified column as a L<DateTime> object.
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print "This event starts the month of ".
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$event->starts_when->month_name();
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If you want to set a specific timezone and locale for that field, use:
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__PACKAGE__->add_columns(
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starts_when => { data_type => 'datetime', timezone => "America/Chicago", locale => "de_DE" }
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);
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If you want to inflate no matter what data_type your column is,
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use inflate_datetime or inflate_date:
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__PACKAGE__->add_columns(
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starts_when => { data_type => 'varchar', inflate_datetime => 1 }
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);
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__PACKAGE__->add_columns(
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starts_when => { data_type => 'varchar', inflate_date => 1 }
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);
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It's also possible to explicitly skip inflation:
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__PACKAGE__->add_columns(
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starts_when => { data_type => 'datetime', inflate_datetime => 0 }
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);
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NOTE: Don't rely on C<InflateColumn::DateTime> to parse date strings for you.
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The column is set directly for any non-references and C<InflateColumn::DateTime>
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is completely bypassed. Instead, use an input parser to create a DateTime
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object. For instance, if your user input comes as a 'YYYY-MM-DD' string, you can
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use C<DateTime::Format::ISO8601> thusly:
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use DateTime::Format::ISO8601;
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my $dt = DateTime::Format::ISO8601->parse_datetime('YYYY-MM-DD');
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=head1 DESCRIPTION
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This module figures out the type of DateTime::Format::* class to
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inflate/deflate with based on the type of DBIx::Class::Storage::DBI::*
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that you are using. If you switch from one database to a different
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one your code should continue to work without modification (though note
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that this feature is new as of 0.07, so it may not be perfect yet - bug
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reports to the list very much welcome).
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If the data_type of a field is C<date>, C<datetime> or C<timestamp> (or
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a derivative of these datatypes, e.g. C<timestamp with timezone>), this
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module will automatically call the appropriate parse/format method for
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deflation/inflation as defined in the storage class. For instance, for
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a C<datetime> field the methods C<parse_datetime> and C<format_datetime>
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would be called on deflation/inflation. If the storage class does not
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provide a specialized inflator/deflator, C<[parse|format]_datetime> will
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be used as a fallback. See L<DateTime/Formatters And Stringification>
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for more information on date formatting.
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For more help with using components, see L<DBIx::Class::Manual::Component/USING>.
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=head2 register_column
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Chains with the L<DBIx::Class::Row/register_column> method, and sets
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up datetime columns appropriately. This would not normally be
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directly called by end users.
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In the case of an invalid date, L<DateTime> will throw an exception. To
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bypass these exceptions and just have the inflation return undef, use
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the C<datetime_undef_if_invalid> option in the column info:
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"broken_date",
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{
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data_type => "datetime",
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default_value => '0000-00-00',
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is_nullable => 1,
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datetime_undef_if_invalid => 1
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}
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=head1 USAGE NOTES
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If you have a datetime column with an associated C<timezone>, and subsequently
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create/update this column with a DateTime object in the L<DateTime::TimeZone::Floating>
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timezone, you will get a warning (as there is a very good chance this will not have the
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result you expect). For example:
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__PACKAGE__->add_columns(
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starts_when => { data_type => 'datetime', timezone => "America/Chicago" }
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);
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my $event = $schema->resultset('EventTZ')->create({
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starts_at => DateTime->new(year=>2007, month=>12, day=>31, ),
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});
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The warning can be avoided in several ways:
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=over 4
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=item Fix your broken code
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When calling C<set_time_zone> on a Floating DateTime object, the timezone is simply
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set to the requested value, and B<no time conversion takes place>. It is always a good idea
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to be supply explicit times to the database:
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my $event = $schema->resultset('EventTZ')->create({
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starts_at => DateTime->new(year=>2007, month=>12, day=>31, time_zone => "America/Chicago" ),
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});
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=item Suppress the check on per-column basis
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__PACKAGE__->add_columns(
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starts_when => { data_type => 'datetime', timezone => "America/Chicago", floating_tz_ok => 1 }
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);
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=item Suppress the check globally
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Set the environment variable DBIC_FLOATING_TZ_OK to some true value.
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=back
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Putting extra attributes like timezone, locale or floating_tz_ok into extra => {} has been
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B<DEPRECATED> because this gets you into trouble using L<DBIx::Class::Schema::Versioned>.
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Instead put it directly into the columns definition like in the examples above. If you still
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use the old way you'll see a warning - please fix your code then!
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=head1 SEE ALSO
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=over 4
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=item More information about the add_columns method, and column metadata,
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can be found in the documentation for L<DBIx::Class::ResultSource>.
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=item Further discussion of problems inherent to the Floating timezone:
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L<Floating DateTimes|DateTime/Floating DateTimes>
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and L<< $dt->set_time_zone|DateTime/"Set" Methods >>
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=back
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=head1 INHERITED METHODS
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=over 4
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=item L<DBIx::Class::InflateColumn>
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L<get_inflated_column|DBIx::Class::InflateColumn/get_inflated_column>, L<inflate_column|DBIx::Class::InflateColumn/inflate_column>, L<set_inflated_column|DBIx::Class::InflateColumn/set_inflated_column>, L<store_inflated_column|DBIx::Class::InflateColumn/store_inflated_column>
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=item L<DBIx::Class::Row>
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L<copy|DBIx::Class::Row/copy>, L<delete|DBIx::Class::Row/delete>, L<discard_changes|DBIx::Class::Row/discard_changes>, L<get_column|DBIx::Class::Row/get_column>, L<get_columns|DBIx::Class::Row/get_columns>, L<get_dirty_columns|DBIx::Class::Row/get_dirty_columns>, L<get_from_storage|DBIx::Class::Row/get_from_storage>, L<get_inflated_columns|DBIx::Class::Row/get_inflated_columns>, L<has_column_loaded|DBIx::Class::Row/has_column_loaded>, L<in_storage|DBIx::Class::Row/in_storage>, L<inflate_result|DBIx::Class::Row/inflate_result>, L<insert|DBIx::Class::Row/insert>, L<insert_or_update|DBIx::Class::Row/insert_or_update>, L<is_changed|DBIx::Class::Row/is_changed>, L<is_column_changed|DBIx::Class::Row/is_column_changed>, L<make_column_dirty|DBIx::Class::Row/make_column_dirty>, L<new|DBIx::Class::Row/new>, L<result_source|DBIx::Class::Row/result_source>, L<set_column|DBIx::Class::Row/set_column>, L<set_columns|DBIx::Class::Row/set_columns>, L<set_inflated_columns|DBIx::Class::Row/set_inflated_columns>, L<store_column|DBIx::Class::Row/store_column>, L<throw_exception|DBIx::Class::Row/throw_exception>, L<update|DBIx::Class::Row/update>, L<update_or_insert|DBIx::Class::Row/update_or_insert>
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=back
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=head1 FURTHER QUESTIONS?
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Check the list of L<additional DBIC resources|DBIx::Class/GETTING HELP/SUPPORT>.
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=head1 COPYRIGHT AND LICENSE
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This module is free software L<copyright|DBIx::Class/COPYRIGHT AND LICENSE>
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by the L<DBIx::Class (DBIC) authors|DBIx::Class/AUTHORS>. You can
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redistribute it and/or modify it under the same terms as the
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L<DBIx::Class library|DBIx::Class/COPYRIGHT AND LICENSE>.
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