Provided by: libdbix-class-schema-loader-perl_0.07045-1_all 
NAME
DBIx::Class::Schema::Loader - Create a DBIx::Class::Schema based on a database
SYNOPSIS
### use this module to generate a set of class files
# in a script
use DBIx::Class::Schema::Loader qw/ make_schema_at /;
make_schema_at(
'My::Schema',
{ debug => 1,
dump_directory => './lib',
},
[ 'dbi:Pg:dbname="foo"', 'myuser', 'mypassword',
{ loader_class => 'MyLoader' } # optionally
],
);
# from the command line or a shell script with dbicdump (distributed
# with this module). Do `perldoc dbicdump` for usage.
dbicdump -o dump_directory=./lib \
-o components='["InflateColumn::DateTime"]' \
-o debug=1 \
My::Schema \
'dbi:Pg:dbname=foo' \
myuser \
mypassword
### or generate and load classes at runtime
# note: this technique is not recommended
# for use in production code
package My::Schema;
use base qw/DBIx::Class::Schema::Loader/;
__PACKAGE__->loader_options(
constraint => '^foo.*',
# debug => 1,
);
#### in application code elsewhere:
use My::Schema;
my $schema1 = My::Schema->connect( $dsn, $user, $password, $attrs);
# -or-
my $schema1 = "My::Schema"; $schema1->connection(as above);
DESCRIPTION
DBIx::Class::Schema::Loader automates the definition of a DBIx::Class::Schema by scanning
database table definitions and setting up the columns, primary keys, unique constraints
and relationships.
See dbicdump for the "dbicdump" utility.
DBIx::Class::Schema::Loader currently supports only the DBI storage type. It has explicit
support for DBD::Pg, DBD::mysql, DBD::DB2, DBD::Firebird, DBD::InterBase, DBD::Informix,
DBD::SQLAnywhere, DBD::SQLite, DBD::Sybase (for Sybase ASE and MSSSQL), DBD::ODBC (for
MSSQL, MSAccess, Firebird and SQL Anywhere) DBD::ADO (for MSSQL and MSAccess) and
DBD::Oracle. Other DBI drivers may function to a greater or lesser degree with this
loader, depending on how much of the DBI spec they implement, and how standard their
implementation is.
Patches to make other DBDs work correctly welcome.
See DBIx::Class::Schema::Loader::DBI::Writing for notes on writing your own vendor-
specific subclass for an unsupported DBD driver.
This module requires DBIx::Class 0.08127 or later, and obsoletes the older
DBIx::Class::Loader.
See DBIx::Class::Schema::Loader::Base for available options.
METHODS
loader
The loader object, as class data on your Schema. For methods available see
DBIx::Class::Schema::Loader::Base and DBIx::Class::Schema::Loader::DBI.
loader_class
Argument: $loader_class
Set the loader class to be instantiated when "connection" is called. If the classname
starts with "::", "DBIx::Class::Schema::Loader" is prepended. Defaults to "storage_type"
in DBIx::Class::Schema (which must start with "::" when using
DBIx::Class::Schema::Loader).
This is mostly useful for subclassing existing loaders or in conjunction with
"dump_to_dir".
loader_options
Argument: \%loader_options
Example in Synopsis above demonstrates a few common arguments. For detailed information
on all of the arguments, most of which are only useful in fairly complex scenarios, see
the DBIx::Class::Schema::Loader::Base documentation.
If you intend to use "loader_options", you must call "loader_options" before any
connection is made, or embed the "loader_options" in the connection information itself as
shown below. Setting "loader_options" after the connection has already been made is
useless.
connection
Arguments: @args
Return Value: $new_schema
See "connection" in DBIx::Class::Schema for basic usage.
If the final argument is a hashref, and it contains the keys "loader_options" or
"loader_class", those keys will be deleted, and their values value will be used for the
loader options or class, respectively, just as if set via the "loader_options" or
"loader_class" methods above.
The actual auto-loading operation (the heart of this module) will be invoked as soon as
the connection information is defined.
clone
See "clone" in DBIx::Class::Schema.
dump_to_dir
Argument: $directory
Calling this as a class method on either DBIx::Class::Schema::Loader or any derived schema
class will cause all schemas to dump manual versions of themselves to the named directory
when they are loaded. In order to be effective, this must be set before defining a
connection on this schema class or any derived object (as the loading happens as soon as
both a connection and loader_options are set, and only once per class).
See "dump_directory" in DBIx::Class::Schema::Loader::Base for more details on the dumping
mechanism.
This can also be set at module import time via the import option "dump_to_dir:/foo/bar" to
DBIx::Class::Schema::Loader, where "/foo/bar" is the target directory.
Examples:
# My::Schema isa DBIx::Class::Schema::Loader, and has connection info
# hardcoded in the class itself:
perl -MDBIx::Class::Schema::Loader=dump_to_dir:/foo/bar -MMy::Schema -e1
# Same, but no hard-coded connection, so we must provide one:
perl -MDBIx::Class::Schema::Loader=dump_to_dir:/foo/bar -MMy::Schema -e 'My::Schema->connection("dbi:Pg:dbname=foo", ...)'
# Or as a class method, as long as you get it done *before* defining a
# connection on this schema class or any derived object:
use My::Schema;
My::Schema->dump_to_dir('/foo/bar');
My::Schema->connection(........);
# Or as a class method on the DBIx::Class::Schema::Loader itself, which affects all
# derived schemas
use My::Schema;
use My::OtherSchema;
DBIx::Class::Schema::Loader->dump_to_dir('/foo/bar');
My::Schema->connection(.......);
My::OtherSchema->connection(.......);
# Another alternative to the above:
use DBIx::Class::Schema::Loader qw| dump_to_dir:/foo/bar |;
use My::Schema;
use My::OtherSchema;
My::Schema->connection(.......);
My::OtherSchema->connection(.......);
make_schema_at
Arguments: $schema_class_name, \%loader_options, \@connect_info
Return Value: $schema_class_name
This function creates a DBIx::Class schema from an existing RDBMS schema. With the
"dump_directory" option, generates a set of DBIx::Class classes from an existing database
schema read from the given dsn. Without a "dump_directory", creates schema classes in
memory at runtime without generating on-disk class files.
For a complete list of supported loader_options, see DBIx::Class::Schema::Loader::Base
The last hashref in the "\@connect_info" can specify the "loader_class".
This function can be imported in the usual way, as illustrated in these Examples:
# Simple example, creates as a new class 'New::Schema::Name' in
# memory in the running perl interpreter.
use DBIx::Class::Schema::Loader qw/ make_schema_at /;
make_schema_at(
'New::Schema::Name',
{ debug => 1 },
[ 'dbi:Pg:dbname="foo"','postgres','',
{ loader_class => 'MyLoader' } # optionally
],
);
# Inside a script, specifying a dump directory in which to write
# class files
use DBIx::Class::Schema::Loader qw/ make_schema_at /;
make_schema_at(
'New::Schema::Name',
{ debug => 1, dump_directory => './lib' },
[ 'dbi:Pg:dbname="foo"','postgres','',
{ loader_class => 'MyLoader' } # optionally
],
);
The last hashref in the "\@connect_info" is checked for loader arguments such as
"loader_options" and "loader_class", see "connection" for more details.
rescan
Return Value: @new_monikers
Re-scans the database for newly added tables since the initial load, and adds them to the
schema at runtime, including relationships, etc. Does not process drops or changes.
Returns a list of the new monikers added.
naming
Arguments: \%opts | $ver
Controls the naming options for backward compatibility, see "naming" in
DBIx::Class::Schema::Loader::Base for details.
To upgrade a dynamic schema, use:
__PACKAGE__->naming('current');
Can be imported into your dump script and called as a function as well:
naming('v4');
use_namespaces
Arguments: 1|0
Controls the use_namespaces options for backward compatibility, see "use_namespaces" in
DBIx::Class::Schema::Loader::Base for details.
To upgrade a dynamic schema, use:
__PACKAGE__->use_namespaces(1);
Can be imported into your dump script and called as a function as well:
use_namespaces(1);
KNOWN ISSUES
Multiple Database Schemas
See "db_schema" in DBIx::Class::Schema::Loader::Base.
ACKNOWLEDGEMENTS
Matt S Trout, all of the #dbix-class folks, and everyone who's ever sent in a bug report
or suggestion.
Based on DBIx::Class::Loader by Sebastian Riedel
Based upon the work of IKEBE Tomohiro
AUTHORS
Caelum: Rafael Kitover <rkitover@cpan.org>
Dag-Erling Smørgrav <des@des.no>
Matias E. Fernandez <mfernandez@pisco.ch>
SineSwiper: Brendan Byrd <byrd.b@insightcom.com>
TSUNODA Kazuya <drk@drk7.jp>
acmoore: Andrew Moore <amoore@cpan.org>
alnewkirk: Al Newkirk <awncorp@cpan.org>
andrewalker: André Walker <andre@andrewalker.net>
angelixd: Paul C. Mantz <pcmantz@cpan.org>
arcanez: Justin Hunter <justin.d.hunter@gmail.com>
ash: Ash Berlin <ash@cpan.org>
blblack: Brandon Black <blblack@gmail.com>
bphillips: Brian Phillips <bphillips@cpan.org>
btilly: Ben Tilly <btilly@gmail.com>
domm: Thomas Klausner <domm@plix.at>
gugu: Andrey Kostenko <a.kostenko@rambler-co.ru>
hobbs: Andrew Rodland <arodland@cpan.org>
ilmari: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
jhannah: Jay Hannah <jay@jays.net>
jnap: John Napiorkowski <jjn1056@yahoo.com>
kane: Jos Boumans <kane@cpan.org>
mattp: Matt Phillips <mattp@cpan.org>
mephinet: Philipp Gortan <philipp.gortan@apa.at>
moritz: Moritz Lenz <moritz@faui2k3.org>
mst: Matt S. Trout <mst@shadowcatsystems.co.uk>
mstratman: Mark A. Stratman <stratman@gmail.com>
oalders: Olaf Alders <olaf@wundersolutions.com>
rbo: Robert Bohne <rbo@cpan.org>
rbuels: Robert Buels <rbuels@gmail.com>
ribasushi: Peter Rabbitson <ribasushi@cpan.org>
schwern: Michael G. Schwern <mschwern@cpan.org>
spb: Stephen Bennett <spb@exherbo.org>
timbunce: Tim Bunce <timb@cpan.org>
waawaamilk: Nigel McNie <nigel@mcnie.name>
... and lots of other folks. If we forgot you, please write the current maintainer or RT.
COPYRIGHT & LICENSE
Copyright (c) 2006 - 2015 by the aforementioned "AUTHORS" in DBIx::Class::Schema::Loader.
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
SEE ALSO
DBIx::Class, DBIx::Class::Manual::Intro, DBIx::Class::Tutorial,
DBIx::Class::Schema::Loader::Base