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DBIx::Class::Helper::Row::SubClass - Convenient subclassing with DBIx::Class

DBIx::Class::Helper::Row::SubClass(3pm) User Contributed Perl Documentation DBIx::Class::Helper::Row::SubClass(3pm)

NAME

DBIx::Class::Helper::Row::SubClass - Convenient subclassing with DBIx::Class

SYNOPSIS

 # define parent class
 package ParentSchema::Result::Bar;
 use strict;
 use warnings;
 use parent 'DBIx::Class';
 __PACKAGE__->load_components('Core');
 __PACKAGE__->table('Bar');
 __PACKAGE__->add_columns(qw/ id foo_id /);
 __PACKAGE__->set_primary_key('id');
 __PACKAGE__->belongs_to( foo => 'ParentSchema::Result::Foo', 'foo_id' );
 # define subclass
 package MySchema::Result::Bar;
 use strict;
 use warnings;
 use parent 'ParentSchema::Result::Bar';
 __PACKAGE__->load_components(qw{Helper::Row::SubClass Core});
 __PACKAGE__->subclass;
or with DBIx::Class::Candy:
 # define subclass
 package MySchema::Result::Bar;
 use DBIx::Class::Candy
    -base => 'ParentSchema::Result::Bar',
    -components => ['Helper::Row::SubClass'];
 subclass;

DESCRIPTION

This component is to allow simple subclassing of DBIx::Class Result classes.

METHODS

subclass

This is probably the method you want. You call this in your child class and it imports the definitions from the parent into itself.

generate_relationships

This is where the cool stuff happens. This assumes that the namespace is laid out in the recommended "MyApp::Schema::Result::Foo" format. If the parent has "Parent::Schema::Result::Foo" related to "Parent::Schema::Result::Bar", and you inherit from "Parent::Schema::Result::Foo" in "MyApp::Schema::Result::Foo", you will automatically get the relationship to "MyApp::Schema::Result::Bar".

set_table

This is a super basic method that just sets the current classes' table to the parent classes' table.

CANDY EXPORTS

If used in conjunction with DBIx::Class::Candy this component will export:
join_table
subclass
generate_relationships
set_table

NOTE

This Component is mostly aimed at those who want to subclass parts of a schema, maybe for sharing a login system in a few different projects. Do not confuse it with DBIx::Class::DynamicSubclass, which solves an entirely different problem. DBIx::Class::DynamicSubclass is for when you want to store a few very similar classes in the same table (Employee, Person, Boss, etc) whereas this component is merely for reusing an existing schema.

AUTHOR

Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com> This software is copyright (c) 2017 by Arthur Axel "fREW" Schmidt.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
2017-07-03 perl v5.24.1