Dancer2::Plugin::DBIC(3p)

NAME
Dancer2::Plugin::DBIC - DBIx::Class interface for Dancer2 applications

VERSION
version 0.0100

SYNOPSIS
    use Dancer2;
    use Dancer2::Plugin::DBIC;

    get '/users/:user_id' => sub {
        my $user = schema('default')->resultset('User')->find(param 'user_id');

        # If you are accessing the 'default' schema, then all the following
        # are equivalent to the above:
        $user = schema->resultset('User')->find(param 'user_id');
        $user = resultset('User')->find(param 'user_id');
        $user = rset('User')->find(param 'user_id');

        template user_profile => {
            user => $user
        };
    };

    dance;

DESCRIPTION
This plugin makes it very easy to create Dancer2 applications that interface with databases. It automatically exports the keyword "schema" which returns a DBIx::Class::Schema object. It also exports the keywords "resultset" and "rset". You just need to configure your database connection information. For performance, schema objects are cached in memory and are lazy loaded the first time they are accessed.

This plugin is a thin wrapper around DBICx::Sugar.

CONFIGURATION
Configuration can be done in your Dancer2 config file. This is a minimal example. It defines one database named "default":

    plugins:
      DBIC:
        default:
          dsn: dbi:SQLite:dbname=some.db

In this example, there are 2 databases configured named "default" and "foo":

    plugins:
      DBIC:
        default:
          dsn: dbi:SQLite:dbname=some.db
          schema_class: MyApp::Schema
        foo:
          dsn: dbi:mysql:foo
          schema_class: Foo::Schema
          user: bob
          password: secret
          options:
            RaiseError: 1
            PrintError: 1

Each database configured must at least have a dsn option. The dsn option should be the DBI driver connection string. All other options are optional.

If you only have one schema configured, or one of them is named "default", you can call "schema" without an argument to get the only or "default" schema, respectively.

If a schema_class option is not provided, then DBIx::Class::Schema::Loader will be used to dynamically load the schema by introspecting the database corresponding to the dsn value. Remember that you need DBIx::Class::Schema::Loader installed to take advantage of that.

The schema_class option, should be a proper Perl package name that Dancer2::Plugin::DBIC will use as a DBIx::Class::Schema class. Optionally, a database configuration may have user, password, and options parameters as described in the documentation for "connect()" in DBI.

You may also declare your connection information in the following format (which may look more familiar to DBIC users):

    plugins:
      DBIC:
        default:
          connect_info:
            - dbi:mysql:foo
            - bob
            - secret
            -
              RaiseError: 1
              PrintError: 1

FUNCTIONS

  schema
    my $user = schema->resultset('User')->find('bob');

The "schema" keyword returns a DBIx::Class::Schema object ready for you to use. If you have configured only one database, then you can simply call "schema" with no arguments. If you have configured multiple databases, you can still call "schema" with no arguments if there is a database named "default" in the configuration. With no argument, the "default" schema is returned. Otherwise, you must provide "schema()" with the name of the database:

    my $user = schema('foo')->resultset('User')->find('bob');

  resultset
This is a convenience method that will save you some typing. Use this only when accessing the "default" schema.

    my $user = resultset('User')->find('bob');

is equivalent to:

    my $user = schema->resultset('User')->find('bob');

  rset
    my $user = rset('User')->find('bob');

This is simply an alias for "resultset".

SCHEMA GENERATION
There are two approaches for generating schema classes. You may generate your own DBIx::Class classes and set the corresponding "schema_class" setting in your configuration as shown above. This is the recommended approach for performance and stability.

It is also possible to have schema classes dynamically generated if you omit the "schema_class" configuration setting. This requires you to have DBIx::Class::Schema::Loader installed. The "v7" naming scheme will be used for naming the auto generated classes. See "naming" in DBIx::Class::Schema::Loader::Base for more information about naming.

For generating your own schema classes, you can use the dbicdump command line tool provided by DBIx::Class::Schema::Loader to help you. For example, if your app were named Foo, then you could run the following from the root of your project directory:

    dbicdump -o dump_directory=./lib Foo::Schema dbi:SQLite:/path/to/foo.db

For that example, your "schema_class" setting would be "Foo::Schema".

SEE ALSO

•   DBICx::Sugar

CONTRIBUTORS

•   Alexis Sukrieh <sukria@sukria.net>

•   Dagfinn Ilmari Mannsåker <<https://github.com/ilmari>>

•   David Precious <davidp@preshweb.co.uk>

•   ennio <<https://github.com/scriplit>>

•   Fabrice Gabolde <<https://github.com/fgabolde>>

•   Franck Cuny <franck@lumberjaph.net>

•   Steven Humphrey <<https://github.com/shumphrey>>

•   Yanick Champoux <<https://github.com/yanick>>

AUTHOR
Naveed Massjouni <naveed@vt.edu>

COPYRIGHT AND LICENSE
This software is copyright (c) 2013 by Naveed Massjouni.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.