tests cleaned a little, added autoloading of on-disk class defs, added currently...

[dbsrgits/DBIx-Class-Schema-Loader.git] / README

NAME
    DBIx::Class::Schema::Loader - Dynamic definition of a
    DBIx::Class::Schema

SYNOPSIS
      package My::Schema;
      use base qw/DBIx::Class::Schema::Loader/;

      __PACKAGE__->load_from_connection(
        dsn                     => "dbi:mysql:dbname",
        user                    => "root",
        password                => "",
        additional_classes      => [qw/DBIx::Class::Foo/],
        additional_base_classes => [qw/My::Stuff/],
        left_base_classes       => [qw/DBIx::Class::Bar/],
        components              => [qw/ResultSetManager/],
        resultset_components    => [qw/AlwaysRS/],
        constraint              => '^foo.*',
        relationships           => 1,
        options                 => { AutoCommit => 1 }, 
        inflect                 => { child => 'children' },
        debug                   => 1,
      );

      # in seperate application code ...

      use My::Schema;

      my $schema1 = My::Schema->connect( $dsn, $user, $password, $attrs);
      # -or-
      my $schema1 = "My::Schema";
      # ^^ defaults to dsn/user/pass from load_from_connection()

      # Get a list of the original (database) names of the tables that
      #  were loaded
      my @tables = $schema1->loader->tables;

      # Get a hashref of table_name => 'TableName' table-to-moniker
      #   mappings.
      my $monikers = $schema1->loader->monikers;

      # Get a hashref of table_name => 'My::Schema::TableName'
      #   table-to-classname mappings.
      my $classes = $schema1->loader->classes;

      # Use the schema as per normal for DBIx::Class::Schema
      my $rs = $schema1->resultset($monikers->{foo_table})->search(...);

DESCRIPTION
    DBIx::Class::Schema::Loader automates the definition of a
    DBIx::Class::Schema by scanning table schemas and setting up columns and
    primary keys.

    DBIx::Class::Schema::Loader supports MySQL, Postgres, SQLite and DB2.
    See DBIx::Class::Schema::Loader::Generic for more, and
    DBIx::Class::Schema::Loader::Writing for notes on writing your own
    db-specific subclass for an unsupported db.

    This module requires DBIx::Class 0.05 or later, and obsoletes
    DBIx::Class::Loader for DBIx::Class version 0.05 and later.

    While on the whole, the bare table definitions are fairly
    straightforward, relationship creation is somewhat heuristic, especially
    in the choosing of relationship types, join types, and relationship
    names. The relationships generated by this module will probably never be
    as well-defined as hand-generated ones. Because of this, over time a
    complex project will probably wish to migrate off of
    DBIx::Class::Schema::Loader.

    It is designed more to get you up and running quickly against an
    existing database, or to be effective for simple situations, rather than
    to be what you use in the long term for a complex database/project.

    That being said, transitioning your code from a Schema generated by this
    module to one that doesn't use this module should be straightforward and
    painless, so don't shy away from it just for fears of the transition
    down the road.

METHODS
  load_from_connection
    Example in Synopsis above demonstrates the available arguments. For
    detailed information on the arguments, see the
    DBIx::Class::Schema::Loader::Generic documentation.

  loader
    This is an accessor in the generated Schema class for accessing the
    DBIx::Class::Schema::Loader::Generic -based loader object that was used
    during construction. See the DBIx::Class::Schema::Loader::Generic docs
    for more information on the available loader methods there.

KNOWN BUGS
    Aside from relationship definitions being less than ideal in general,
    this version is known not to handle the case of multiple relationships
    between the same pair of tables. All of the relationship code will be
    overhauled on the way to 0.03, at which time that bug will be addressed.

AUTHOR
    Brandon Black, "blblack@gmail.com"

    Based on DBIx::Class::Loader by Sebastian Riedel

    Based upon the work of IKEBE Tomohiro

THANK YOU
    Adam Anderson, Andy Grundman, Autrijus Tang, Dan Kubb, David Naughton,
    Randal Schwartz, Simon Flack and all the others who've helped.

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

SEE ALSO
    DBIx::Class