GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  DBIX::CLASS::DYNAMICDEFAULT (3)

.ds Aq ’

NAME

DBIx::Class::DynamicDefault - Automatically set and update fields

CONTENTS

SYNOPSIS



  package My::Schema::SomeTable;

  __PACKAGE__->load_components(qw/DynamicDefault ... Core/);

  __PACKAGE__->add_columns(
          quux          => { data_type => integer },
          quux_plus_one => { data_type => integer,
                             dynamic_default_on_create => \&quux_plus_one_default,
                             dynamic_default_on_update => quux_plus_one_default, },
          last_changed  => { data_type => integer,
                             dynamic_default_on_create => now,
                             dynamic_default_on_update => now, },
  );

  sub quux_plus_one_default {
      my ($self) = @_;
      return $self->quux + 1;
  }

  sub now {
      return DateTime->now->epoch;
  }



Now, any update or create actions will set the specified columns to the value returned by the callback you specified as a method name or code reference.

DESCRIPTION

Automatically set and update fields with values calculated at runtime.

OPTIONS

    dynamic_default_on_create



  dynamic_default_on_create => sub { ... }

  dynamic_default_on_create => method_name



When inserting a new row all columns with the dynamic_default_on_create option will be set to the return value of the specified callback unless the columns value has been explicitly set. The callback, that’ll be invoked with the row object as its only argument, may be a code reference or a method name.

    dynamic_default_on_update



  dynamic_default_on_update => sub { ... }

  dynamic_default_on_update => method_name



When updating a row all columns with the dynamic_default_on_update option will be set to the return value of the specified callback unless the columns value has been explicitly set.

Columns will only be altered if other dirty columns exist. See always_update on how to change this.

    always_update



  always_update => 1



When setting always_update to 1 dynamic_default_on_update callbacks will always be invoked, even if no other columns are dirty.

AUTHOR

Florian Ragwitz <rafl@debian.org>

LICENSE

This software is copyright (c) 2008 by Florian Ragwitz.

This is free software; you can redistribute it and/or modify it under the same terms as perl itself.

Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 DBIX::CLASS::DYNAMICDEFAULT (3) 2012-04-14

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.