1. + In this presentation I will walk through DBIx::Class
which helps you get started
DBIX::CLASS
WALK THROUGH

2. ~ Sheeju Alex ~

3. DBI BACKGROUND
+ Perl Database Interface Module
+ High level layer to interact with databases

4. DBI BACKGROUND
+ Awesome module which can connect to any database you
ask
+ Uniform interface to handle different types of databases

5. + Is an ORM (Object Relational Mapper)
+ SQL => Object
DBIX::CLASS
+ Database tables becomes Object
+ Table data and relationships between tables become object
methods

6. + Alternatives?
DBIX::CLASS
+ DBIx::Class or Rose::DB::Object (Perl)
+ Hibernate (Java)
+ Yii/Zend (PHP)

7. + Founded by Matt S. Trout (mst)
+ Website:
DBIX::CLASS
http://www.dbix-class.org/

8. + Benefits?
DBIX::CLASS
+ No more writing SQL
+ Make your coding easier
+ Cross DB: Majority of code should run on all databases
+ SQL statements are executed when it is needed (perfoma)

9. + User Role Mangement Example
DBIX EXAMPLE: GENERATE SCHEMA

10. + dbicdump
DBIX EXAMPLE: GENERATE SCHEMA
dbicdump -o dump_directory=./lib DBIxTest::Schema
dbi:Pg:dbname=dbix_test sheeju
"{quote_char=>q{"}, quote_field_names=>{0}, name_sep=>{.} }"

11. + make_schema_at using simple perl script
DBIX EXAMPLE: GENERATE SCHEMA
#!/usr/bin/env perl
use FindBin;
use Getopt::Std;
use Data::Dumper;
use lib "$FindBin::Bin/../lib";
use DBIx::Class::Schema::Loader 'make_schema_at';
our ($opt_F, $opt_d);
getopts('Fd');
make_schema_at('DBIxTest::Schema',
{
debug => !!($opt_d),
really_erase_my_files => !!($opt_F),
dump_directory=>"$FindBin::Bin/lib",
overwrite_modifications=>1,
preserve_case=>1,
},
['dbi:Pg:dbname=dbix_test','sheeju','sheeju',
{'quote_char' => '"', 'quote_field_names' => '0', 'name
],
);

12. + DBIxTest/Schema.pm
DBIX EXAMPLE: GENERATE SCHEMA
use utf8;
package DBIxTest::Schema;
# Created by DBIx::Class::Schema::Loader
# DO NOT MODIFY THE FIRST PART OF THIS FILE
use strict;
use warnings;
use base 'DBIx::Class::Schema';
__PACKAGE__->load_namespaces;
1;

13. + Result/User.pm (User Object or User Table)
DBIX EXAMPLE: GENERATE SCHEMA
package DBIxTest::Schema::Result::User;
use base 'DBIx::Class::Core';
__PACKAGE__->table("User");
__PACKAGE__->add_columns(
"Id",
{
accessor => "id", data_type => "integer", is_auto_increment => 1, is_nullable => 0,
sequence => "User_Id_seq",
},
"Name",
{ accessor => "name", data_type => "varchar", is_nullable => 0, size => 255 },
"Email",
{ accessor => "email", data_type => "varchar", is_nullable => 0, size => 255 },
"PasswordSalt",
{ accessor => "password_salt", data_type => "bytea", is_nullable => 0 },
"PasswordHash",
{ accessor => "password_hash", data_type => "bytea", is_nullable => 0 },
"Status",
{ accessor => "status", data_type => "varchar", default_value => "Active", is_nullable => 0, size => 64 },
);
__PACKAGE__->set_primary_key("Id");
__PACKAGE__->add_unique_constraint("User_Email_key", ["Email"]);
__PACKAGE__->has_many(
"user_roles",
"DBIxTest::Schema::Result::UserRole",
{ "foreign.UserId" => "self.Id" },
);
__PACKAGE__->many_to_many("roles", "user_roles", "role");

14. + Result/Role.pm
DBIX EXAMPLE: GENERATE SCHEMA
package DBIxTest::Schema::Result::Role;
use strict;
use warnings;
use base 'DBIx::Class::Core';
__PACKAGE__->table("Role");
__PACKAGE__->add_columns(
"Id",
{
accessor => "id", data_type => "integer", is_auto_increment => 1, is_nullable => 0,
sequence => "Role_Id_seq",
},
"Name",
{ accessor => "name", data_type => "varchar", is_nullable => 0, size => 255 },
);
__PACKAGE__->set_primary_key("Id");
__PACKAGE__->has_many(
"user_roles",
"DBIxTest::Schema::Result::UserRole",
{ "foreign.RoleId" => "self.Id" },

15. + Result/UserRole.pm
DBIX EXAMPLE: GENERATE SCHEMA
package DBIxTest::Schema::Result::UserRole;
use strict;
use warnings;
use base 'DBIx::Class::Core';
__PACKAGE__->table("UserRole");
__PACKAGE__->add_columns(
"UserId",
{
accessor => "user_id", data_type => "integer", is_foreign_key => 1, is_nullable
},
"RoleId",
{
accessor => "role_id", data_type => "integer", is_foreign_key => 1, is_nullable
},
);
__PACKAGE__->set_primary_key("UserId", "RoleId");
__PACKAGE__->belongs_to(
"role",
"DBIxTest::Schema::Result::Role",

16. + Schema creations
DBIX EXAMPLE: SCHEMA
use DBIxTest::Schema;
my $schema = DBIxTest::Schema->connect( "DBI:Pg:dbname=dbix_test",
"sheeju", "sheeju", { RaiseError => 1, PrintError => 1, 'quote_char' => '"', 'quote

17. + C: Create
DBIX EXAMPLE: CRUD
+ Create/Insert Record
my $user_01 = $schema->resultset('User')->create(
{
Name => 'JohnSample',
Email => 'john@sample.com',
PasswordSalt => 'sheeju',
PasswordHash => 'sheeju',
Status => 'Active',
}
);

18. + R: Read
DBIX EXAMPLE: CRUD
+ Read All records
my $all_users = $schema->resultset('User')->all;
+ Select/search query
$active_users = $schema->resultset('User')->search({"Status" => "Active"});
+ JOIN and Search query
$active_users = $schema->resultset('User')->search(
{"user_roles.RoleId" => 1},
{"join" => "user_roles"});

19. + U: Update
DBIX EXAMPLE: CRUD
+ Update User Email
$user_01->update({Email => 'sheeju@exceleron.com'});
+ Update with Join
$active_users = $schema->resultset('User')->search(
{"user_roles.RoleId" => 1},
{"join" => "user_roles"});
$active_users->update({Status => 'InActive'});

20. + D: Delete
DBIX EXAMPLE: CRUD
+ Delete Record
$user_01->delete;
my $user = $schema->resultset('User')->search(
{ Email => 'jeremy@purepwnage.com' }
)->first;
$user->delete if($user);

21. DBIX EXAMPLE: METHODS YOU LIKE
+ find_or_create
+ update_or_create
+ $schema->deploy

22. RESULT VS RESULTSET
+ Result = Row
+ ResultSet = Query Plan ($user->active)

23. Sheeju Alex
THANKS!
Happy Coding :)
Exceleron Inc
Lead Product Developer
sheeju@exceleron.com