casual-perl talks #1

1. DBIx::Skinny
Ryo Miyake - nekoya -
(id:studio-m)

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3. • nekoya
• id:studio-m
• http://twitter.com/nekoya
• http://wassr.jp/user/nekoya
•

4. DBIx::SKinny
by nekokak

5. SQL
DBIx::Skinny::Manual::JA::Intro

6. • CPAN
• github
• http://github.com/nekokak/p5-dbix-skinny

7. DBI ORM
• SQL
• Row

8. • MyApp::DB, MyApp::DB::Schema

9. • Row DBIx::Skinny::Row
• MyApp::DB::Row::{Table}

10. rule inflate/deflate
inflate/deflate
install_inflate_rule '^.+_at$' => callback {
inflate {
my $value = shift;
return $value;
};
deflate {
my $value = shift;
return $value;
};
};

11. rule inflate/deflate
my $timezone = DateTime::TimeZone->new(name => 'Asia/Tokyo');
install_inflate_rule '^.+_at$' => callback {
inflate {
my $value = shift;
my $dt = DateTime::Format::Strptime->new(
pattern => '%Y-%m-%d %H:%M:%S',
time_zone => $timezone,
)->parse_datetime($value);
return DateTime->from_object( object => $dt );
};
deflate {
my $value = shift;
return DateTime::Format::MySQL->format_datetime($value);
};
};

12. trigger
trigger

13. trigger
install_table 'user' => schema {
pk 'id';
columns qw/id name mail created_at updated_at/;
trigger pre_insert => sub {
my ( $class, $args ) = @_;
$args->{created_at} ||= DateTime->now;
};
trigger pre_update => sub {
my ( $class, $args ) = @_;
$args->{updated_at} ||= DateTime->now;
};
};

14. • inflate/deflate
• trigger
trigger
created_at pre_insert

15. common_trigger (ry

16. trigger
trigger common_trigger
install_common_trigger pre_insert => sub {
my ($self, $args) = @_;
$args->{created_at} ||= DateTime->now;
};
• trigger

17. trigger
install_common_trigger pre_insert => sub {
my ($self, $args, $table) = @_;
my $columns = $self->schema->schema_info
->{$table}->{columns};
$args->{created_at} ||= DateTime->now
if grep {/^created_at$/} @$columns;
};
trigger

18. nekokak YAPC
• http://nekokak.org/presen/yapcasia2009-dbix-
skinny/
github
• http://github.com/nekokak/p5-dbix-skinny/blob/
master/lib/DBIx/Skinny/Manual/JA/

20. DBIx::Skinny::Schema::Loader

21. MyApp::DB::Schema install_table
• pk columns DB
• http://github.com/nekoya/p5-dbix-skinny-schema-
loader

22. : load_schema
package Your::DB::Schema;
use base qw/DBIx::Skinny::Schema::Loader/;
__PACKAGE__->load_schema;

23. : load_schema
package Your::DB::Schema;
use base qw/DBIx::Skinny::Schema::Loader/;
install_table books => schema {
trigger pre_insert => sub {
my ($class, $args) = @_;
$args->{ name } = 'HOGE';
}
};
__PACKAGE__->load_schema;
1;

24. : make_schema_at
publish_schema.pl
use DBIx::Skinny::Schema::Loader
qw/make_schema_at/;
print make_schema_at(
'Your::DB::Schema', # Schema class
{ }, # options
[ 'dbi:SQLite:test.db', '', '' ] # connect info
);

25. : make_schema_at
$ perl publish_schema.pl > Your/DB/Schema.pm
• DBIC
• Skinny Schema 1
•

26. make_schema_at
my $tmpl = << '...';
# custom template
install_utf8_columns qw/jpname title content/;
install_common_trigger pre_insert => sub {
my ($self, $args) = @_;
$args->{created_at} ||= DateTime->now;
};
...

27. make_schema_at
print make_schema_at(
'Mock::DB::Schema',
{
before_template => $before,
},
[ 'dbi:SQLite:test.db', '', '' ]
);
• after_template

28. table_template
• install_table
• TT table, pk, columns
install_table [% table %] => schema {
pk '[% pk %]';
columns qw/[% columns %]/;
};

29. DBIx::Skinny::
InflateColumn::DateTime

30. DBIx::Skinny::InflateColumn::DateTime
• _at, _on DateTime inflate/deflate
• created_xx, updated_xx
inspired
DBIx::Class::InflateColumn::DateTime::Auto
(hidek++)
http://blog.hide-k.net/archives/2006/08/
dbixclassauto_i.phpdbixclassauto_i.php

31. DBIx::Skinny::InflateColumn::DateTime
• MySQL
• timestamp now()
• insert select
• Perl
• …

32. DBIx::Skinny::InflateColumn::DateTime
package Your::DB::Schema;
use DBIx::Skinny::Schema;
use DBIx::Skinny::InflateColumn::DateTime;
install_table table1 => {
pk 'id';
columns qw/id name created_at updated_at/;
};
install_table table2 => {
pk 'id';
columns qw/id name booked_on created_on updated_on/;
};

33. Ark::Plugin::Authentication::
Store::DBIx::Skinny

34. Ark by typester
• Catalyst
• http://typester.stfuawsc.com/slides/yapsasia2009-
ark/
• Ark
• Ark + Skinny

35. package MyApp;
use Ark;
use MyApp::Models;
use_model 'MyApp::Models';
use_plugins qw{
Session
Session::State::Cookie
Session::Store::Memory
Authentication
Authentication::Credential::Password
Authentication::Store::DBIx::Skinny
};

36. config 'Plugin::Authentication::Store::DBIx::Skinny' => {
model => 'db',
table => 'members',
user_field => 'name',
};
• DBIC
•

37. DBIx::Skinny::AR

38. DBIx::Skinny::AR
• Any::Moose
• ActiveRecord
• http://github.com/nekoya/p5-dbix-skinny-ar

39. DBIx::Skinny::AR
• Model
• DB

40. DBIx::Skinny::AR
DBIC
• Row use base 'DBIx::Class'
• Model DB
• DBIC
• pixis …

41. DBIx::Skinny::AR
DBIx::Skinny (ry

42. DBIx::Skinny::AR
package MyApp::DB;
use DBIx::Skinny;
package MyApp::DB::Schema;
use DBIx::Skinny::Schema;
install_table books => schema {
pk 'id';
columns qw/id author_id title/
};

43. • MyApp::DB::Schema MyApp/DB.pm
• MyApp::DB
use DBIx::Skinny setup => {
dsn => 'dbi:SQLite:test.db',
username => '',
password => '',
};
MyApp::DB->connect($conf->{ database });

44. DBIx::Skinny::AR
package MyApp::AR;
use Any::Moose;
extends 'DBIx::Skinny::AR';
__PACKAGE__->setup('MyApp::DB');
1;

45. package Mock::Book;
use Any::Moose;
extends 'Mock::AR';
use Carp;
has 'id' => (
is => 'rw',
isa => 'Undef | Int',
);
has 'author_id' => (
is => 'rw',
isa => 'Undef | Int',
);

46. has 'title' => (
is => 'rw',
isa => 'Str',
traits => [qw/Unique/],
);
__PACKAGE__->belongs_to('author');
1;

47. find
my $book = MyApp::Book->find(1);
my $book = MyApp::Book->find({ title => ‘hoge’ });
my $books = MyApp::Book->find_all;
my $latests = MyApp::Book->find_all(
{ author_id => $author_id },
{ order_by => { id => 'desc' } }
);

48. Relationships
• belongs_to
• has_one
• has_many
• many_to_many

49. Relationships
• $book->author
•
has 'author' => (
is => 'ro',
isa => 'MyApp::Author',
clearer => 'clear_author',
lazy => 1,
default => sub { … }
);

50. Relationships
DB
• $book->author->clear_author
• $book->author->reload

51. Trait::Unique
has 'title' => (
is => 'rw',
isa => 'Str',
traits => [qw/Unique/],
);
•
•
• SQL

53. • perldoc DBIx::Skinny
•
• SQLite
•

54. IRC
#dbix-skinny at perl.org ( irc.perl.org )
#perl-casual at Freenode ( irc.freenode.net )

55. Skinny Skinny
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