DBIx::Class::InflateColumn::DateTime(3pm)		User Contributed Perl Documentation		 DBIx::Class::InflateColumn::DateTime(3pm)

NAME

       DBIx::Class::InflateColumn::DateTime - Auto-create DateTime objects from date and datetime columns.

SYNOPSIS

       Load this component and then declare one or more columns to be of the datetime, timestamp or date datatype.

	 package Event;
	 use base 'DBIx::Class::Core';

	 __PACKAGE__->load_components(qw/InflateColumn::DateTime/);
	 __PACKAGE__->add_columns(
	   starts_when => { data_type => 'datetime' }
	   create_date => { data_type => 'date' }
	 );

       Then you can treat the specified column as a DateTime object.

	 print "This event starts the month of ".
	   $event->starts_when->month_name();

       If you want to set a specific timezone and locale for that field, use:

	 __PACKAGE__->add_columns(
	   starts_when => { data_type => 'datetime', timezone => "America/Chicago", locale => "de_DE" }
	 );

       If you want to inflate no matter what data_type your column is, use inflate_datetime or inflate_date:

	 __PACKAGE__->add_columns(
	   starts_when => { data_type => 'varchar', inflate_datetime => 1 }
	 );

	 __PACKAGE__->add_columns(
	   starts_when => { data_type => 'varchar', inflate_date => 1 }
	 );

       It's also possible to explicitly skip inflation:

	 __PACKAGE__->add_columns(
	   starts_when => { data_type => 'datetime', inflate_datetime => 0 }
	 );

       NOTE: Don't rely on "InflateColumn::DateTime" to parse date strings for you.  The column is set directly for any non-references and
       "InflateColumn::DateTime" is completely bypassed.  Instead, use an input parser to create a DateTime object. For instance, if your user
       input comes as a 'YYYY-MM-DD' string, you can use "DateTime::Format::ISO8601" thusly:

	 use DateTime::Format::ISO8601;
	 my $dt = DateTime::Format::ISO8601->parse_datetime('YYYY-MM-DD');

DESCRIPTION

       This module figures out the type of DateTime::Format::* class to inflate/deflate with based on the type of DBIx::Class::Storage::DBI::*
       that you are using.  If you switch from one database to a different one your code should continue to work without modification (though note
       that this feature is new as of 0.07, so it may not be perfect yet - bug reports to the list very much welcome).

       If the data_type of a field is "date", "datetime" or "timestamp" (or a derivative of these datatypes, e.g. "timestamp with timezone"), this
       module will automatically call the appropriate parse/format method for deflation/inflation as defined in the storage class. For instance,
       for a "datetime" field the methods "parse_datetime" and "format_datetime" would be called on deflation/inflation. If the storage class does
       not provide a specialized inflator/deflator, "[parse|format]_datetime" will be used as a fallback. See DateTime::Format for more
       information on date formatting.

       For more help with using components, see "USING" in DBIx::Class::Manual::Component.

   register_column
       Chains with the "register_column" in DBIx::Class::Row method, and sets up datetime columns appropriately.  This would not normally be
       directly called by end users.

       In the case of an invalid date, DateTime will throw an exception.  To bypass these exceptions and just have the inflation return undef, use
       the "datetime_undef_if_invalid" option in the column info:

	   "broken_date",
	   {
	       data_type => "datetime",
	       default_value => '0000-00-00',
	       is_nullable => 1,
	       datetime_undef_if_invalid => 1
	   }

USAGE NOTES

       If you have a datetime column with an associated "timezone", and subsequently create/update this column with a DateTime object in the
       DateTime::TimeZone::Floating timezone, you will get a warning (as there is a very good chance this will not have the result you expect).
       For example:

	 __PACKAGE__->add_columns(
	   starts_when => { data_type => 'datetime', timezone => "America/Chicago" }
	 );

	 my $event = $schema->resultset('EventTZ')->create({
	   starts_at => DateTime->new(year=>2007, month=>12, day=>31, ),
	 });

       The warning can be avoided in several ways:

       Fix your broken code
	   When calling "set_time_zone" on a Floating DateTime object, the timezone is simply set to the requested value, and no time conversion
	   takes place. It is always a good idea to be supply explicit times to the database:

	     my $event = $schema->resultset('EventTZ')->create({
	       starts_at => DateTime->new(year=>2007, month=>12, day=>31, time_zone => "America/Chicago" ),
	     });

       Suppress the check on per-column basis
	     __PACKAGE__->add_columns(
	       starts_when => { data_type => 'datetime', timezone => "America/Chicago", floating_tz_ok => 1 }
	     );

       Suppress the check globally
	   Set the environment variable DBIC_FLOATING_TZ_OK to some true value.

       Putting extra attributes like timezone, locale or floating_tz_ok into extra => {} has been DEPRECATED because this gets you into trouble
       using DBIx::Class::Schema::Versioned.  Instead put it directly into the columns definition like in the examples above. If you still use the
       old way you'll see a warning - please fix your code then!

SEE ALSO

       More information about the add_columns method, and column metadata, can be found in the documentation for DBIx::Class::ResultSource.
       Further discussion of problems inherent to the Floating timezone: Floating DateTimes and $dt->set_time_zone

AUTHOR

       Matt S. Trout <mst@shadowcatsystems.co.uk>

CONTRIBUTORS

       Aran Deltac <bluefeet@cpan.org>

LICENSE

       You may distribute this code under the same terms as Perl itself.

perl v5.14.2							    2011-08-19				 DBIx::Class::InflateColumn::DateTime(3pm)